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dRaInagE and SERvIcE ductS
501 (05/01) Pipes for drie for Serieds
geerl
1 (11/06)WherethetermdrainisusedinthisSeriesit
shallbedeemedtoincludethetermssewerandpiped
culvert.
TheContractorshalldesignthepipedculvertslistedin
Appendix1/10inaccordancewiththerequirementsof
Clause106.
Series8000(MCHW5.8.2)appliestotheinstallationby
trenchlesstechniquesofhighwaydrainage,service
ducts,sleevesandculvertswithinternaldiametersuptoandincluding900mmnominalinternaldiameteror
width.
2 (11/04)Alldrainsconstructedofpipesaswellas
pipedculvertsuptoandincluding900mminternaldiametershallcomplywiththisSeriesandany
additionalrequirementsinAppendix5/1.Drains
constructedusingpipesexceeding900mminternaldiameteraswellasboxandpipedculvertsshallcomply
withSeries2500.UnlessotherwisedescribedinAppendix5/1onlyonetypeofpipeshallbeusedwithinanyindividualdrainorserviceductbetween
consecutivechambers.TheContractorshallensurethat
plasticspipesarenotsubjecttodeteriorationduetosunlightduringtheperiodbetweenmanufactureand
installationintheground.
Pipes for drie
3 Pipesfordrainageshallbeselectedfromthe
alternativesinTable5/1andshallcomplywiththe
standardsandparticularrequirementstherein.TheContractorshallshowthatthepipesheselectshave
hydraulicflowcapacityequaltothatadoptedinthe
hydraulicdesignofthesystemasdescribedinAppendix5/1.Pipesandfittingsotherthanthose
includedinTable5/1shallbepermittedprovidedthat
theyholdacurrentBritishBoardofAgrmentRoadsandBridgesCertificate(orequivalent)statingthatthey
areasuitablealternativefortheusagespecifiedin
Table5/1.Oncompletionofthewholeofthedrainageworks,theContractorshallprovidetheOverseeing
Organisationwithascheduleshowingdetailsofallpipe
typesused,includingquality,jointsandnameofmanufacturer.
corre Seel Pipes
4 Corrugatedsteelpipesshallbemanufacturedfromeither:
(i) boltedsegmentalplatepipescomplyingwith
sub-Clause6ofthisClauseandhavingplatethicknessesasdescribedinAppendix5/1;or
(ii) (05/06)galvanizedsteelsheetsuitableforlock
seamfabricationcomplyingwithBSEN10327gradeDX51D+Z600,or
aluminiumcoatedsteelsheetcomplyingwith
AASHTOspecificationM274-87(2004).
Corrugatedsteelpipescomplyingwith(ii)aboveshall
bemanufacturedfromsteelofminimumthickness
1.25mmunlessotherwisedescribedinAppendix5/1.
5 (11/03)WheredescribedinAppendix5/1corrugatedsteelpipesshallbeprovidedwithadditionalprotection
ofhotappliedbitumencomplyingwithAASHTO
specificationM190-95(2000),oranequivalentcoatingsystem.
6 Boltedsegmentalplatepipesshallmeetthe
followi1ngrequirements:
(i) (11/03)Steelfortheplatesshallcomplywith
BS1449:Part1.1,Grade3orGrade4,
ConditionHR.
(ii) Afterforming,thedepthofthecorrugations
shallbewithinatoleranceof6%andthe
pitchofthecorrugationswithinatoleranceof4%ofthenominaldimensions.Plates
shallhaveaminimumlipof45mmbeyond
eachendcrest.Cutedgesshallbefreefromnotches,gouges,rustorburrs.
(iii) (11/06)Boltsandnutsforconnectingplates
shallcomplywithBSENISO4014,
BSEN4017andBSENISO4032,forBSENISO898-1andBSEN20898-2,
ISO898-2propertyclass8.8,nominalsize
M20;orwithBS4395:Part2,nominalsizeM20;orwithBSENISO898-1and
BSEN20898-2,ISO898-2propertyclass
10.9.
(iv) Whenalltheplateshavebeenassembled,the
nutsshallbetightenedagainstadomed
washer.Thetighteningshallberepeatedifnecessarytoachievethetorque
recommendedbythemanufacturer.
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Volume1 Series500SpecificationforHighwayWorks DrainageandServiceDucts
(v) Steelplateshallbegalvanizedincompliance
withClause1909.Platesshallbegalvanized
afterformingthecorrugationsandcompletingallnecessarycutting,punching
anddrilling.Unitsinwhichthezinccoatinghasbeenburnedbyweldingorotherwisedamagedinfabrication,transportorhandling
atSiteshallbemadegoodincompliance
withClauses1907and1908.Boltsandnutsshallbegalvanizedincompliancewith
Clause1909.
Amendment-May2006 3
taBLE 5/1:(05/05)Pipes for drie
Meril use Sr Prilr Reqiremes
Vitrifiedclay Fouldrains BS65orBSEN295
NormalpipesasdefinedinBS65
Surfacewaterdrains BS65or
BSEN295
Normalorsurfacewaterpipesas
definedinBS65
Filterdrains BS65
BSEN295
Unperforated,notexceeding2.0minlength
withspigotandsocketopenjoints
OR
Perforatedwithflexiblemechanicaljoints
Concrete(WithPortlandcement
orsulfate-resistingcementwhen
requiredinAppendix5/1.
Supersulfatedcementshallnot
beused)
Foul&surfacewaterdrains
notexceeding900mm
internaldiameter
BS5911-1and
BSEN1916(Ordinary
reinforcedor
unreinforced)
BS5911-5
Surfacewaterdrainsnot
exceeding900mminternal
diameter
BS5911-110 Forusewithjointscomplyingwith
sub-Clause504.4
Filterdrains BS5911-114(Porous
withogeeorrebated
joints)
BS5911-110 Unperforatednotexceeding2minlength
withopenjointsorcastellatedrebatedjoints
withthetotalslotareabetweencastellations
beingatleast1000mmpermetrelengthof
pipeOR
Perforatedwithcircularholesnotgreater
than10mmnorlessthan3mmindiameter
Glassreinforcedplastics(GRP) Foul&surfacewaterdrains BS5480 ClasstobeasspecifiedinAppendix5/1
Iron Foul&surfacewaterdrains BS437(Castiron)
BSEN598(Ductile
iron)
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taBLE 5/1: (11/06) Pipes for drie (oie)
Meril use Sr Prilr Reqiremes
Thermoplasticssolidwallpipes
andfittingsnotexceeding
900mmdiameter
Unplasticisedpolyvinyl-chloride
(PVC-U)
Polypropylene(PP)
Polyethylene(PE)
Foul&surfacewater
drains
BS4660orBS5481
orBSEN1401
(PVC-U)
BSEN1852-1(PP)
BSEN12666-1(PE)
SeetheUKnationalforwardtotherelevantBS
EN.Thegradeappropriateforusewithout
structuralcalculationsshallbeusedi.e.SN8for
PP&PEandSN4(SDR41)forPVC-U
Filterdrains BS4660or
BS5481or
BSEN1401(PVC-U)
BSEN1852-1(PP)
BSEN12666-1(PE)
Perforatedwithnotlessthan1000mmofholes
permetrelengthofpipe.Theperforationsshall
notreducethepipestiffnessbymorethan5%.
Circularperforationsnotgreaterthan10mmnor
lessthan3mmindiameterorrectangularslots
notgreaterthan4mmnorlessthan0.6mmin
width
Thermoplasticsstructuredwallpipeandfittingsnotexceeding
900mmdiameter
Surfacewaterdrains Clause518 Unperforatedwithwatertightjointsandwithapipestiffnessclass,creepratioandimpact
resistanceasdescribedin
Appendix5/1
Filterdrains Clause518 Perforatedwithnotlessthan1000mm2ofholes
permetrelengthofpipe.Theperforationsshall
notreducethepiperingstiffnessbymorethan
5%.Circularperforationsnotgreaterthan10
mmnorlessthan3mmindiameteror
rectangularslotsnotgreaterthan4mmnorless
than0.6mminwidth
Subsoilfielddrains BS4962or
Clause518
Corrugatedsteel Surfacewaterdrains,filter
drainsnotexceeding
900mminternaldiameter
AASHTO
specification
M36M-01exceptas
otherwiserequiredin
sub-Clauses501.4,
5and6
Alldrainsexceeding900mminternaldiametershallcomplywithSeries2500.
Pipes for Serie ds
Amendment-November2009 4
7 (11/09)Pipesforserviceducts,excludingthosein
useinmotorwaycommunicationsinstallations,shallbeselectedfromthealternativesinTable5/2andshallcomplywiththestandardsandparticularrequirements
therein.Pipesforuseinmotorwaycommunications
installationsshallcomplywithSeries1500.Pipesforotherserviceductsinstalledusingtrenchlessmethods
shallconformtoSeries8000(MCHW5.8.2).Pipesfor
serviceductsshallhaveasmoothinternalborewithoutanysharpedgestotheendsofpipes.Theyshallcomply
withanyadditionalrequirementsdescribedin
Appendix5/2,andbeof100mminternaldiameterunlessotherwisedescribedtherein.Theiralignment
shallbetestedinaccordancewithsub-Clause509.9.TheuseofpipesandfittingsotherthanthoseincludedinTable5/2shallbepermittedprovidedthattheyholda
currentBritishBoardofAgrmentRoadsandBridges
Certificate(orequivalent)statingthattheyareasuitablealternativetothoselistedinTable5/2.
8 Eachductshallbefittedwithapigmented,stranded
polypropyleneorequivalentrot-proofmaterialdrawropeof5kNbreakingloadandhavingadesignlifeof
notlessthan20years,theendsofwhichshallbeeither
madefasttomarkerblocksasshownonHCDDrawingNumberI1orsecuredinsidechambers.Theendsofa
ductshallbeeithersealedbyremovablestoppers
immediatelyithasbeenlaid,orterminatedinchambersofthetypespecifiedinAppendix5/2.
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5
TABLE 5/2: (11/06) Pipes for Ducts
Material Standard Particular Requirements
Vitrified clay BS 65 or Plain-ended, self-aligning flexible sleeve jointed with internal ends
BS EN 295 radiused to 3 mm minimum
Iron BS EN 598
(Ductile iron)
Glass reinforced plastics BS 5480 Class to be as specified in Appendix 5/2
Thermoplastics solid wall BS 4660 or When pipes BS 3506 (Class C) are used, joints shall comply with
BS 5481 or BS EN 1452-1 to 5 as appropriate
Unplasticised polyvinyl-chloride BS 3506 (Class C) or
(PVC-U) BS EN 1401,
BS EN 1452-1 to 5 as
appropriate class PN10.
Polypropylene (PP) BS EN 1852-1 (PP)
Polyethylene (PE) BS EN 12666-1 (PE)
Thermoplastics single wall BS EN 50086-2-4 Ducts to BS EN 50086-2-4 shall be classified as normal duty,
corrugated have a degree of protection against ingress of foreign objects
(Restricted to ducts buried a classification rating of 3 or 4 and a degree of protection against
minimum of 600 mm below the ingress of water classification rating of 7. Appendix 5/2 shall state
surface) the resistance to bending requirements.
Thermoplastics structured wall BS EN 50086-2-4 and Ducts to BS EN 50086-2-4 shall be classified as normal duty,
Clause 518 have a degree of protection against ingress of foreign objects
classification rating of 3 or 4 and a degree of protection against
ingress of water classification rating of 7. Appendix 5/2 shall state
the resistance to bending requirements.
Pipes for use in motorway communications installations shall comply with Series 1500
502 Excavation for Pipes and Chambers
1 Excavation shall comply with Clause 602 and with
the following:
(i) (05/04)soft spots existing below the bottomof an excavation shall be removed and the
resulting voids backfilled with Type 1
unbound mixture for subbase complyingwith Clause 803 or pipe bedding material
complying with Clause 503, both well
compacted, or ST1 concrete in compliance toClause 2602;
(ii) any additional excavation below the bottom
of an excavation that is required because the
Contractor has allowed the bottom tobecome soft or otherwise unacceptable for
the construction of the pipeline or chambersshall be made good as described in
sub-Clause 1(i) of this Clause;
(iii) any excavation greater than the net volume
required for the Permanent Works below thelevel of any pipe surround shall be made
good as described in (i) above.
2 Unless otherwise described in Appendix 5/1, all
pipes in or under new embankments shall be laid onlywhen the embankment has been formed and compacted
to formation level under paved areas, to finished
earthworks level in other areas, or to a level which willgive a minimum cover of 1.2 m to the pipes, whichever
is the lowest.
503 (11/05) Bedding, Laying and Surrounding
of Pipes
1 Immediately following the excavation of the
trench, the pipes shall be laid and jointed on the pipebed. Pipes shall be laid so that each one is in contact
with the bed throughout the length of its barrel. The
pipes shall be laid at the level and gradients shown onthe Drawings and schedules. The deviation in level
from that specified at any point shall not exceed 20 mmand in addition the algebraic difference of the deviation
in level at any two points on each pipe shall not exceed
30 mm. In the case of socketed or sleeve jointed pipes
the bed shall be cut away and removed at each socket orsleeve to give a clearance of at least 50 mm, or 100 mmfor trenches in material designated as Hard Material, so
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6
that the socket or sleeve does not bear on the bed. Pipesshall be laid on setting blocks only where a concrete
bed or cradle is used.
Pipes and fittings shall be examined for damage and the
joint surfaces and components shall be cleaned
immediately before laying. Measures shall be taken toprevent soil or other material from entering pipes, and
to anchor each pipe to prevent movement before thework is complete.
2 Pipes complying with BS 4962 : 1989 which arecorrugated coilable perforated pipes shall, unless
otherwise permitted in Appendix 5/1, be laid only by
automatic single pass drain laying machines.
3 (11/06) Drainage pipe and bedding combinationsshall be selected from the alternatives described in
Appendix 5/1. The granular material shall consist of
natural and/or recycled coarse aggregate or recycledconcrete aggregate complying with BS EN 13242.
Where recycled coarse aggregate or recycled concreteaggregate is used in this Clause, it shall have been
tested in accordance with Clause 710 and shall not
contain more than 1% other materials (Class X). Pipe
bedding, haunching and surrounding material shall be
as shown on HCD Drawing Numbers F1 and F2, andshall comply with the following:
(i) (05/04) For pipes on beds shown on HCD
Drawing Number F1 as Types B, F and S the
aggregate shall have:(a) (05/04) geometrical requirements in
accordance with Table 5/3;
(b) (05/04) a resistance to fragmentation inCategory LA
50in accordance with
BS EN 13242, clause 5.2 and Table 9;
(c) (11/07) a water-soluble sulfate content of
less than 0.38% of sulfate (as SO3) when
tested in accordance with
BS EN 1744-1, clause 10;
(d) (05/04) all other requirements inCategoryNR
.
(ii) (05/04) For pipes on beds shown on HCD
Drawing Number F1 as Types N and T theaggregate shall comply with the geometrical
requirements of either Table 5/3 or withTable 5/4, and with the fragmentation, water-
soluble sulfate content and other
requirements of (i) above.
TABLE 5/3: (05/04) BS EN 13242, Coarse aggregate
for pipe bedding, haunching and surrounding
material
BS EN 13242, Coarse aggregate (clause 4.3.2)
Category for general grading GC80-20requirements
Category for tolerances at GTNR
(no requirements)
mid-size sieves
Category for maximum values of Gravel - f1.5
fines content Crushed rock, recycled
aggregate - f4
Aggregate size, mm
Nominal pipe diameter, mm
Graded Single sized
Not exceeding 140 - 4/10
Exceeding 140 but not 2/14 or 4/20 4/10, 6/10 or exceeding 400 10/20
Exceeding 400 2/14, 4/20 4/10, 6/14,
or 4/40 10/20 or 20/40
TABLE 5/4: (05/04) BS EN 13242, Fine and all-in
aggregated for pipe bedding, haunching and
surrounding material
BS EN 13242, Fine and all-in aggregate (clause 4.3.3)
Fine All-in
Category for general grading Category Category GA80
requirements GF80
Category for tolerances on GTFNR GT
ANR
manufacturers declared (no requirement) (no requirement)
typical grading
Category for maximum Gravel - f3
values of fines content Crushed rock, recycled
aggregate -f11
Aggregate size, mm
Nominal pipe diameter, mm
Fine All-in
Not exceeding 140 0/10
Exceeding 140 but not 0/1, 0/2, 0/4 0/10 or 0/20
exceeding 400 or 0/6
Exceeding 400 0/10, 0/20 or
0/40
(iii) (11/03) For pipes on beds shown on HCDDrawing Number F1 as Types A and Z
concrete shall be ST4 and ST2, in
compliance to Clause 2602, respectively.Backfilling shall not be carried out until after
the concrete has cured.
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(iv) Exceptforfilterdrainsafurthersurround
abovethebed,haunchandsurround
describedaboveshallbeprovidedtoaheightof300mmabovethetopofthepipe
consistingofClass8lowertrenchfillmaterialasdescribedinTable6/1andincompliancewithSeries600.
(v) UnlessotherwisedescribedinAppendix5/1
thematerialsusedforthebedding,haunchingandsurroundingoffilterdrainsshallcomply
withtheappropriatebedding,haunchingand
surroundingmaterialsspecifiedinsub-Clauses503.3.(i)to503.3.(iv)andwiththe
requirementsforbackfillingspecifiedin
sub-Clause505.3.
4(05/04)
Materialforbedding,haunchingandsurroundingpipesshallnotbedepositedwithin
500mm,oranyotherdistancesdescribedin
Appendix5/1,ofconcrete,cementboundmaterials,othercementitiousmaterialsorstabilisedcapping
formingpartofthePermanentWorksif,whentestedin
accordancewithTRLReport447either:
(i) (11/05)thewater-solublesulfate(WS)contentexceeds1500mgofsulfate(asSO
4)perlitre
(TestNo.1);or
(ii) (11/09)theoxidisablesulfides(OS)content
exceeds0.5%ofsulfate(asSO4)(TestNo.2andTestNo.4);or
(iii) (11/09)the2:1watertosoilextractpreparedforthedeterminationofwater-solublesulfate
in(i)hasapHvalueoflessthan7.2,when
testedusingtheelectrometricmethodofpHdeterminationinaccordancewithBS1377-3.
(11/09)Atleastfivesamplesofeachmaterialshallbe
testedforWS,OSandpHvalue.Themeanofthe
highesttwovaluesshallbeusedforcomparisonwiththelimitingvalues.Thisalsoappliesifsixtonine
resultsareavailable.Iftenormoreresultsareavailable,themeanofthehighest20%oftheresultsshallbeusedforcomparisonwiththelimitingvalues.
5 (11/07)Materialforbedding,haunchingand
surroundingpipesshallnotbedepositedwithin500mm,oranyotherdistancesdescribedin
Appendix5/1,ofmetallicstructuralelementsforming
partofthePermanentWorksif,whentestedinaccordancewithTRLReport447either:
(i) (11/05)thewater-solublesulfate(WS)content
exceeds300mgofsulfate(asSO4)perlitre
(TestNo.1);or(ii) theoxidisablesulfides(OS)contentexceeds
0.06%ofsulfate(asSO4)(TestNo.2andTest
No.4).
(11/05)Atleastfivesamplesofeachmaterialshallbe
testedforWSandOS.Themeanofthehighesttwo
valuesshallbeusedforcomparisonwiththelimitingvalues.Thisalsoappliesifsixtonineresultsare
available.Iftenormoreresultsareavailable,themeanofthehighest20%oftheresultsshallbeusedforcomparisonwiththelimitingvalues.
(11/07)Therequirementsin(i)and(ii)aboveshallnot
applytometallicitemsprotectedbyconcreteand
ancillarymetallicitemssuchasthetopsofchambersandgullies.
6 (05/04)Exceptwherethepipelineistobetestedin
compliancewithClause509beforebackfilling,the
completionofthebedding,haunchingandsurroundingofthepipesistobecarriedoutimmediatelyafter
jointing.Thebed,haunchandsurroundshallbebrought
upequallyonbothsidesofthepipeensuringthatitisincontactwiththeundersideofthepipebarrelandbe
carefullycompactedinlayersnotexceeding150mm
thicknessensuringfullcompactionnexttothetrenchwalls.Pipesshallbemaintainedtolineandlevelduring
thebedding,haunchingandsurroundingoperations.
Wherepipelinesaretobetestedbeforebeingcoveredthebeddinghaunchingandsurroundingmaterialshall
onlybebroughtupsufficientlytosupportthepipeline
andthejointsshallbeleftexposeduntilthetestiscompletedsatisfactorily.
7 (05/04)DuctconstructionshallcomplywiththerequirementsofAppendix5/2.
504 Joii of Pipes
1 Rigidjointsshallmeanjointsmadesolidby
caulkingthesockets,orboltingtogetherflangesintegral
withthepipes.Flexiblejointsshallmeanjointsmadewithdeformableringsorgasketsheldbetweenpipe
spigotsandsockets,sleevesorcollars.
2 Jointsinsurfacewaterdrainsshallbewatertightcomplyingwithsub-Clause3ofthisClauseorpartly
watertightcomplyingwithsub-Clause4ofthisClauseasdescribedinAppendix5/1.Fouldrainsshallhavewatertightjoints.Filterdrainsshallhavejoints
complyingwithsub-Clause6ofthisClause.Ductsneed
nothavewatertightjointsunlessotherwisedescribedinAppendix5/2.
3 (05/01)Watertightjointsshallcomplywiththe
appropriateBritishStandards,themanufacturers
instructionsandthefollowing:
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(i) Rigidjointsshallbeusedonlywhere
permittedinAppendix5/1.Spigotsand
socketsofrigidjointsmaybecaulkedwithtarredropeyarnorequivalentandthesocket
completelyfilledwithmortardesignation(i)complyingwithClause2404,excludinglime;afilletofmortarbeingworkedaroundthe
socketextendingforalengthofnotlessthan
50mmfromthefaceofthesocket.Ironpipeswithopensocketsshallhaverigidjoints
caulkedwithleadwoolorequivalent.
(ii) JointsinPVC-Upipesshallnotbemadewithplasticsolvent.
(iii) Flexiblemechanicaljointsmaybeusedwith
surfacewaterpipescomplyingwithBS65.
(iv) (11/03)JointsforcastironpipestoBS437shallcomplywithBSEN877.
(v) Jointsinthermoplasticsstructuredwallpipe
shallcomplywithClause518.
4 (05/01)Partlywatertightjointsforsurfacewater
drainsshallbetestedinaccordancewithsub-Clause
509.7andshallbeBritishStandardjointsornon-BritishStandardjoints.Pushfitjointsshallhavearegisterto
ensurethatthepipeisfullypushedintothejoint.
Corrugatedsteelpipesoflockseamfabrication,notexceeding900mminternaldiameter,shallbejoinedin
accordancewiththemanufacturersinstructions.Bolted
segmentalplatepipearchesorcircularpipes,not
exceeding900mminternaldiameter,shallbejoinedinaccordancewithsub-Clause501.6(iv)andthe
manufacturersinstructions.
5 Whereaconcretebed,cradle,archorsurroundisusedwithrigidpipeshavingflexiblejoints,jointfiller
boardcomplyingwithClause1015shallbeplacedin
contactwiththeendofthesocketatapipejointandshallextendthroughthefullthicknessoftheconcretein
contactwiththepipe.Suchjointsintheconcretebed,
haunchorsurroundshallbeatintervalsnotexceeding5metresexceptwherethespacingofjointsinthepipe
exceeds5metreswhentheyshallbeateachpipejoint.
6 (05/01)Jointsinpipesforfilterdrainsshallcomply
withtheappropriateBritishStandardandwiththefollowing:
(i) Non-porousandunperforatedconcreteand
claypipeswithspigotandsocket,rebatedorogeejointsshallbelaidwithunsealedjoints
andwithagapof10mmbetweentheendof
thepipeandtheinnerendofthesocketor
rebate.Thepipesshallbesupportedwithtarredropeyarnorequivalentflexible
jointingmaterialwithinthesocketsoverthe
lowerthirdofthecircumferencesothatthere
arenoverticalstepsbetweenonepipeandanother.Suchpipesshallonlybeusedwith
TypeBfiltermaterialasdescribedin
Clause505.(ii) Theendsofperforated,castellatedorporous
concretepipeswithrebatedjointsand
perforatedclaywarepipeswithrebatedorwithflexiblesleevejointsshallbepushed
tightlytogether.Thewidthofslotsmeasured
alongthelengthofthepipelineformedbyjointingcastellatedpipesshallnotexceed
10mm.
(iii) Perforatedorslottedthermoplasticspipeswithspigotsandsocketsorsleevesmaybe
dry-jointedorjointedasdescribedinsub-Clauses3and4ofthisClause.
(iv) Otherperforatedpipesshallbejointedas
unperforatedpipesofthesamematerial.
7 Jointsinpipesforserviceductsshallcomplywith
theappropriateBritishStandardandwiththefollowing:
(i) Pipesforductsshallbejointedsothatnosilt,
grit,groutorconcretesurroundisableto
entertheduct.Pipeswithpush-fitjointsshallhavearegistertoensurethatthepipeisfully
pushedintothejoint.
(ii) (05/05)JointsinpipestoBS3506shall
complywithBSEN1452-1to5as
appropriate.
505 Bkfilli of trehes Filer dris
1 Backfillingshallbeundertakenimmediatelyafter
therequiredoperationsprecedingithavebeen
completed.
2 ExceptwhereotherwisedescribedinAppendix5/1,
trenchesotherthanfilterdraintrenchesshallbebackfilledabovethepipesurroundmaterialdescribedinClause503,withClass1,2,or3generalfillmaterial
complyingwithSeries600.
3 (11/06)FilterdrainsshallbebackfilledasdescribedinAppendix5/1withTypeA,TypeBorTypeCfilter
materialwhichshallconsistofnaturalorrecycled
coarseaggregateorrecycledconcreteaggregatecomplyingwithBSEN13242andthefollowing:
(i) forTypeAandC,gradingrequirementsfor
unboundmixturesinaccordancewith
Table5/5andBSEN13285;(ii) forTypeB,geometricalrequirementsin
accordancewithTable5/5andBSEN13242;
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(iii) aresistancetofragmentationinCategory
LA50
inaccordancewithBSEN13242,
clause5.2andTable9;
(iv) (11/07)awater-solublesulfatecontentofless
than0.38%ofsulfate(asSO3)whentestedinaccordancewithBSEN1744-1,clause10;
(v) allotherrequirementsinCategoryNR
;
Amendment-November2009 9
(vi) benon-plasticwhentestedinaccordance
withBS1377:Part2.
WhererecycledcoarseaggregateorrecycledconcreteaggregateisusedinaccordancewiththisClause,itshall
havebeentestedinaccordancewithClause710andshallnotcontainmorethan1%othermaterials(ClassX).
tble 5/5:(11/05)gri eomeril reqiremes for filer ri meril
type a type B type c
Standard BSEN13285 BSEN13242 BSEN13285
Size,mm 0/20 20/40
Asdescribedin
Appendix5/1
Gradingandoversizecategories GF(withan
additionalsieve)
GC
80-20
Oversizecategory OC80
-
Categoryfortolerancesatmid-sizesieves - GTNR
(norequirement)
Categoryformaximumfines UF3
fNR
(norequirement)
Summarygradingrequirements
Sievesize,mm Percentagebymasspassing
80 - 100
AsdescribedinAppendix5/1
63 - 98-100
40 100 80-99
20 80-99 0-20
10 50-90 0-5
4 30-75 -
2 15-60 -
0.500 0-35 -
0.125 0-4 -
0.063 0-3 -
%insizefraction4/10 5-35 -
2/4 5-35 -
Filtermaterials,whentestedinaccordancewith
sub-Clause509.8shallhavepermeabilityrequirementsasdescribedinAppendix5/1.
WhenTypeAmaterialisusedwithpipesotherthan
porouspipesatleast15%ofthematerialshallbelargerthanthediameterofholeorlargerthan1.2timesthe
widthofslotinthepipe.4 (11/07)Materialforbackfillingtrenchesandfilterdrainsshallnotbedepositedwithin500mm,orany
otherdistancesdescribedinAppendix5/1,ofconcrete,boundmaterials,othercementitiousmaterialsor
stabilisedcappingformingpartofthePermanentWorks
if,whentestedinaccordancewithTRLReport447either:
(i) (11/05)thewater-solublesulfate(WS)content
exceeds1500mgofsulfate(asSO4)perlitre(TestNo.1);or
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(ii) (11/09)theoxidisablesulfides(OS)content
exceeds0.5%ofsulfate(asSO4)(TestNo.2
andTestNo.4);or
(iii) (11/09)the2:1watertosoilextractprepared
forthedeterminationofwater-solublesulfatein(i)hasapHvalueoflessthan7.2,whentestedusingtheelectrometricmethodofpH
determinationinaccordancewithBS1377-3.
(11/09)Atleastfivesamplesofeachmaterialshallbe
testedforWS,OSandpHvalue.Themeanofthehighesttwovaluesshallbeusedforcomparisonwith
thelimitingvalues.Thisalsoappliesifsixtonine
resultsareavailable.Iftenormoreresultsareavailable,themeanofthehighest20%oftheresultsshallbeused
forcomparisonwiththelimitingvalues.
5 (11/07)Materialforbackfillingtrenchesandfilterdrainsshallnotbedepositedwithin500mm,orany
otherdistancesdescribedinAppendix5/1,ofmetallic
structuralelementsformingpartofthePermanentWorksif,whentestedinaccordancewithTRLReport
447either:
(i) (11/05)thewater-solublesulfate(WS)content
exceeds300mgofsulfate(asSO4)perlitre
(TestNo.1);or
(ii) theoxidisablesulfides(OS)contentexceeds
0.06%ofsulfate(asSO4)(TestNo.2andTest
No.4).
(11/05)Atleastfivesamplesofeachmaterialshallbe
testedforWSandOS.Themeanofthehighesttwovaluesshallbeusedforcomparisonwiththelimiting
values.Thisalsoappliesifsixtonineresultsare
available.Iftenormoreresultsareavailable,themeanofthehighest20%oftheresultsshallbeusedfor
comparisonwiththelimitingvalues.
(11/07)Therequirementsin(i)and(ii)aboveshallnot
applytometallicstructuralelementsprotectedby
concreteandancilliaryitemssuchasthetopsof
chambersandgullies.6 (05/04)Backfillingshallbedepositedandcompacted
incompliancewithClause612.Filtermaterialforfilter
drainsshallbedepositedinlayersnotexceeding225mmloosedepth;eachlayerbeingcompactedin
compliancewithTable6/4Method3.
7 (05/04)Materialshallbedepositedinevenlayers
andshallnotbeheapedinthetrenchbeforebeingspread.Spreadingandcompactionshallbecarriedout
evenlywithoutdislodging,distortingordamagingthe
pipe.Powerrammersshallnotbeusedwithin300mm
ofanypartofthepipeorjoint.8 (05/04)Exceptincarriageways,otherpavedareas
andlocationsdescribedinAppendix5/1,backfillof
trenchesshallbebroughtuptogroundlevel.Where
topsoilisatthesurfaceonthelineofthetrenchthe
uppersectionofthebackfillshallbetopsoilofthe
thicknessdescribedinAppendix6/8,orofthesamethicknessandqualityoftopsoilasthesurrounding
groundwherenothicknessisspecified.Fortrenchesincarriagewaysorotherpavedareasthebackfillshallbebroughtuptoformationlevel,orsub-formationlevel
wherecappingisrequired,unlessalowerlevelis
describedinAppendix5/1.Sheetingandotherexcavationsupportsshallberemovedasthefilling
proceedsunlessotherwisedescribedinAppendix6/3.
9 (05/04)Thepositionofserviceductsshallbemarked
whenthetrenchesarebackfilledandpermanentmarker
blocksandlocationpostsprovidedasdescribedinAppendix5/2.
506 coei o Exisi dris chmbers chels
1 WheredescribedinAppendix5/1,existingdrains
shallbeextended,connectedandjointedtonewdrains,
chambersorchannels.Allsuchconnectionsshallbemadeduringtheconstructionofthenewdrainorother
workandtheirpositionsrecordedbytheContractorwho
shallhandtotheOverseeingOrganisationacopyoftherecordoftheconnectionsmadethepreviousday.Where
pipeconnectionsaremadetoexistingbrickconcreteor
stonedrains,chambersorchannels,thepipesshallbewellandtightlybuiltintotheconcrete,brickormasonry
workandbesoplacedastodischargeatananglenot
greaterthan60tothedirectionofflowofthedrainorchannelandwiththeendofthepipecarefullycuttothe
necessaryangle.Wheretheconnectionsarebetween
pipedrains,specialconnectingpipesshallbelaidandjointedasdescribedinAppendix5/1.
2 Beforeenteringorbreakingintoanexistingsewer
ordrain,theContractorshallgivenoticeofhisintentiontodosototheauthorityresponsibleforthepipelineto
whichtheconnectionistobemade.
3 (11/06)Existingdrainsnolongerrequiredshall,as
requiredbyAppendix5/1,besealedwithST2concrete,
incompliancetoClause2602,orremovedandreplacedwithgeneralfillmaterialcomplyingwithClause601
andTable6/1andcompactedincompliancewith
Clause612,orgroutedwitha1:10,cement:pfamix.Thegroutshallusetheminimumquantityofwaterto
ensurethefluiditynecessarytorenderitcapableof
beingpumpedtotheendsofthepipe.Itshallbeusedwithinonehourofmixingbutwhenthemixcontainsa
retardingadmixturethistimemaybeextendedin
accordancewiththemanufacturersinstructions.ThecementshallcomplywithBS197-1andthepulverised-
fuelash(pfa)withBS3892:Part2,finenesstoZoneB
andsulfatecontentnotexceeding1.5%.
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507 (05/01) chmbers
1 (11/03)Chambers,otherthanthoseusedinmotorwaycommunicationsinstallations,shallinclude
manholes,catchpits,inspectionchambers,drawpitsand
walledsoakaways.ChambersshallbeofthetypespecifiedinAppendix5/1,constructedinaccordance
withHCDDrawingNumbersF3toF12andF25toF27
asappropriatetothattype.Chambersforusein
motorwaycommunicationsinstallationsshallcomplywithSeries1500.AllSTconcretereferredtointhis
ClauseshallcomplywithClause2602,unlessotherwise
describedinAppendix5/1.
2 (11/03)FoundationstochambersshallbeofST4
concrete.Channelsforchambersshallbeformedand
finishedsmoothinthefoundationconcreteor
constructedofpreformedhalfcirclechannels,withsidesbenchedinST4concrete,ormortardesignation(i)
complyingwithClause2404excludinglime.
Alternativelyforinspectionchambersnotexceeding1.3metresindepthtoinvert,completeplasticsunitsor
otherunitsinequivalentmaterialsurroundedby
150mmofST4concretemaybeused.
3 BrickworkshallcomplywithSeries2400andbe
builtwithmortardesignation(i)inEnglishbond.The
jointsofbrickworkwhereexposedshallbefinishedasspecifiedforunpointedjointsinClause2412.Theends
ofallpipesshallbeneatlybuiltintothebrickworkand
finishedflushwithmortardesignation(i).
4 (11/04)PrecastconcretechambersshallcomplywithBS5911-3andBSEN1917andtheparticular
requirementsdescribedinAppendix5/1.Castin-situ
concretechambersshallbeconstructedofST4concretecomplyingwithClause2602andtheparticular
requirementsdescribedinAppendix5/1.
5 (11/04)Corrugatedgalvanizedsteelchambersshall
complywithClause501withinsituST4concreteinvertsandprecastconcretecoverslabscomplyingwith
BS5911-3andBSEN1917andtheparticular
requirementsdescribedinAppendix5/1.TheyshallbesurroundedwithwellgradedgranularmaterialClass6M
asdescribedinTable6/1compactedinaccordancewith
Clause612.
6 (11/04)Wherethedepthofinvertofchambers,
excludinginspectionchambers,exceeds900mmbelow
thefinishedsurfaceofthecarriagewayortheadjacentground,manholestepscomplyingwithBSEN13101
shallbebuiltinaccordancewithrelevantSeriesF-HCD
Drawings.Steelworkusedforladders,handholdsandotherfittingsshallcomplywithBS970:Part1andbe
galvanizedincompliancewithClause1909afterfabrication.ThreadedcomponentsshallbegalvanizedincompliancewithClause1909.
7 (11/03)Excavationaroundchambers,exceptthose
describedinsub-Clause5ofthisClause,shallbebackfilledwithgeneralfillmaterialasdescribedin
Table6/1andcompactedincompliancewith
Clause612.Wheremechanicalcompactionisimpracticable,theexcavationshallbebackfilledwith
ST2concrete.Wherethereareprecastconcreteaccess
shaftstoprecastconcretechambers,theshaftsshallbesurroundedbyaminimumthicknessof150mmofST4
concrete,andtheremainingexcavationbackfilledwith
generalfillmaterialasdescribedinTable6/1compactedincompliancewithClause612.
8 Chambersforfouldrainsshallbetestedfor
watertightnessasandwhererequiredinAppendix5/1.
9 (11/09)Chambercovers,gratingsandframesshall
beasdescribedinAppendix5/1andshallcomplywithBSEN124andsub-Clauses10and15ofthisClause.
Thecovershallbeofsuitablematerial,designandconstructiontoachieveanin-serviceskid/slipresistance
potentialsuitablefortheconditionsofuse.Thisshallbe
determinedbytheacceleratedpolishtestmethoddescribedinBS9124.ThePSRVshallbeasstatedin
Appendix5/1.
10 ClassD400unitsandaboveshallincorporateapermanentnon-rockfeatureeithertriangularpoint
suspensionormachinedfaces.
11 (11/03)Boltssuppliedforlooselycouplingseparatesectionsofcoversandgratingsshallbesteelhexagonheaded,complyingwiththerequirementof
BSENISO4016,BSENISO4018and
BSENISO4034andbegalvanizedincompliancewithClause1909.TheyshallnotbelessthansizeM16
completewithhexagonnutandshallbeprovidedwith
meanstopreventunduetighteningofunitsections.
12 UnlessotherwisespecifiedinAppendix5/1,all
covers,gratingsandframesshallbesuppliedinafine
cast(uncoated)condition.WhereacoatingisspecifiedinAppendix5/1,thecoatingshallonlybeappliedwhen
thesurfacesofthecastingareclean,freefromrustanddry.
13 RequirementsforspecialdutycoversforuseincarriagewaysshallbeasdescribedinAppendix5/1.
14 Gratingsforcatchpitchambersshallhavea
minimumwaterwayareaasdescribedinAppendix5/1.
15 Twosetsofliftingkeysshallbedeliveredtothe
OverseeingOrganisationforeachtypeofcover
supplied.Atleasttwokeyways,asdetailedonHCDDrawingNo.F17,shallbeprovidedineachcomplete
cover,oneineachsegmentforsegmentalcovers.Arecessforaprisingbarshallbeincorporatedinmanholecoversunlessothermeansoflooseningthecoverfrom
theframeareprovided.
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16 Framesforchambercoversandgratingsshallbeset
incementmortardesignation(i)complyingwithClause2404oraproprietaryquicksettingmortarof
equivalentstrength.
17 Forallpipelinesexceptthoseconstructedwithcorrugatedpipesthenearestjointtoanychambershall
benotmorethan500mmfromtheinnerfaceofthe
wallandshallnotberestrictedbyanyconcrete.Betweenthisandthenextjoint,thelengthofthe
articulatedpipeshallbeinaccordancewithTable5/6.
taBLE 5/6: Leh of arile Pipe
nomil Pipe dimeer (mm) Leh of Pipe (mm)
450andless 500to750
Greaterthan450 750to1000
18 Wheretheadjustmentorreplacementofexisting
framesandcoversorgratingsisrequired,theunitsshall
betakenupandre-fixedorremovedandreplacedwithnewunitscomplyingwithsub-Clauses9to15ofthis
Clause,orasdescribedinAppendix5/1.Ontakingup
orremovaloftheunit,anyconcreteormortarbeddingshallbebrokenoutandthesurfaceprepared.Where
existingframesandcoversorgratingsaretobe
adjusted,theContractorshalltakeuptheunitandcleanitforre-use.Theadjustedorreplacedunitsshallbelaid
onamortarbedcomplyingwithsub-Clause16ofthis
Clause.Thefinishedthicknessofthemortarbedshallbebetween10mmand25mm.Whererequiredin
Appendix5/1,coversandgratingsshallbebeddedusing
aproprietaryquicksettinghighstrengthmortar.Detailsofsuchmortarshallbetotheapprovalofthe
OverseeingOrganisation.Unlessotherwisedescribedin
Appendix5/1,adjustedorreplacedframesandcoversorgratingsshallbesetflushwiththenewsurface.Any
additionaladjustmentsshallbebymodifyingthe
brickworkincompliancewithsub-Clause507.3orby
usingaframeofasuitabledepth.Oncompletionoftheworks,eachcovershallbeliftedandtheframeand
seatingcleaned.
#508 gllies Pipe Jios
1 (05/06)Gulliesshallbetrapped,untrappedor
sumplessasdescribedinAppendix5/1andbeinaccordancewithHCDDrawingNumbersF13andF14.
AllSTconcretereferredtointhisClauseshallcomply
withClause2602unlessotherwisedescribedinAppendix5/1.
2 Gulliesshallbeconstructedsothatnopartofthe
spoutortraphasacross-sectionalarealessthan2/3rd
thatoftheoutlet.Thedepthofwatersealintrapped
gulliesshallbenotlessthan50mm.
3 (05/05)PrecastconcretegulliesshallcomplywithBS5911-6andclaygullieswithBSEN295.Insitu
concretegulliesshallbeasdescribedinAppendix5/1andconstructedofST4concreteof150mmminimumthickness,usingpermanentorremovableshuttering.
Whereinsituconcretegulliesareformedwith
permanentshuttering,suchshutteringshallhaveacurrentBritishBoardofAgrmentRoadsandBridges
Certificate.
4 Gullygratings,kerbtypegullycoversandframesshallcomplywithBSEN124andthefollowingand
shallbeoftheclassesandsizesdescribedin
Appendix5/1.
5 (05/01)TheuppersurfaceofgullygratingsshallbeflatexceptwhereotherwisedescribedinAppendix5/1.
Slotsingratingsorbetweengratingsandframesshall
notbeorientatedparalleltothedirectionoftrafficexceptwheretheslotsarelessthan150mmlongorless
than20mmwide.Minimumwaterwayareasshallbeas
specifiedinAppendix5/1.UnlessotherwisespecifiedinAppendix5/1,allgratingsandframesshallbesupplied
inafinecast(uncoated)condition.Whereacoatingis
specifiedinAppendix5/1,thecoatingshallonlybeappliedwhenthesurfacesofthecastingareclean,free
fromrustanddry.Framesshallbebeddedonmortar
complyingwithsub-Clause507.16.Brickworkshallcomplywithsub-Clause507.3.
6 (05/04)Backfillingtoprecastgulliesshallbecarriedoutuptosub-formationlevelwithgeneralfillmaterial
Class1,asdescribedinTable6/1compactedin
compliancewithClause612.Wheremechanicalcompactionisimpracticable,thebackfillingshallbein
ST2concrete.Theremainderofthebackfillingshallbe
inappropriatecappingandroadpavementmaterialsexceptthatwheremechanicalcompactionofcappingor
unboundmixtureforsubbaseisimpracticableST2
concreteshallbeused.7 (11/03)Gullyconnectionpipesshallbeeitherflexibleorrigidnotexceeding0.7minlengthwith
flexiblejointsforadistanceof2mfromthegullyand
shallbeinaccordancewithsub-Clause507.17whenenteringchambers.Junctionpipesshallbemanufactured
ofthesametypeandclassofmaterialastheremainder
ofthepipesintherun.Junctionpipeswhicharelaidbutnotimmediatelyconnected,shallbefittedwith
temporarystoppersorsealsandthepositionofallsuch
junctionsshallbeclearlydefinedbymeansofstakesortracingwiresproperlymarkedorlabelled.Saddlesmay
beusedtoformjunctionsonlywherepermittedinAppendix5/1.Nointernalprojectionsgreaterthan5mmwillbepermitted.Saddlesforasbestoscement
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andplasticspipesshallbeinstalledinaccordancewith
themanufacturersrecommendations.Saddleswithclay
pipesshallbejointedwithmortardesignation(i)complyingwithClause2404,excludinglime.Saddles
andpipesshallbesurroundedwithST2concrete.8 (05/01)Wheretheadjustmentorreplacementofexistingframesandgratingsisrequired,theunitsshall
betakenupandre-fixedorremovedandreplacedwith
newunitscomplyingwithsub-Clauses4and5ofthisClause,orasdescribedinAppendix5/1.Ontakingup
orremovaloftheunit,anyconcreteormortarbedding
shallbebrokenoutandthesurfaceprepared.Whereexistingframesandcoversorgratingsaretobe
adjusted,theContractorshalltakeuptheunitandclean
itforre-use.Theadjustedorreplacedunitsshallbelaid
atalevel,unlessotherwisedescribedinAppendix5/1,
6mmbelowtheadjoiningroadsurfaceonamortarbedcomplyingwithsub-Clause507.16.Thefinished
thicknessofthemortarbedshallbebetween10mmand25mm.WhererequiredinAppendix5/1,coversand
gratingsshallbebeddedusingaproprietaryquick
settinghighstrengthmortar.DetailsofsuchmortarshallbetotheapprovaloftheOverseeingOrganisation.Any
additionaladjustmentshallbemadebymodifyingthe
brickworkincompliancewithsub-Clause507.3orbyusingaframeofsuitabledepth.Oncompletionofthe
works,eachgratingshallbeliftedandtheframeand
seatingcleaned.
509 tesi clei
1 DrainsrequiredinAppendix5/1tohavewatertightjointsshallbetestedasdescribedinAppendix1/5in
sections,eg.betweenchambers,bymeansoftheairtest
describedinsub-Clause2ofthisClause.Ifapipelineisrejectedbecauseofafailedairtest,aspartofthe
rectificationwork,awatertestasdescribedinsub-
Clause3ofthisClausemaybecarriedoutasanalternativeacceptabilitytest.Beforetesting,theendsof
thepipelinetobetested,includingthoseofshortbranches,shallbepluggedandsealed.
2 Forthepipelineairtest,airshallbepumpedinby
suitablemeansuntilastablepressureof100mmhead
ofwaterisindicatedinaU-tubeconnectedtothesystem.Theairpressureshallnotfalltolessthan
75mmheadofwaterduringaperiodof5minutes
withoutfurtherpumping,afteraninitialperiodtoallowstabilization.Drainswithtrapsshallbetestedto50mm
headofwaterandthepermissiblelossshallthenbeno
morethan13mmheadofwaterin5minuteswithoutfurtherpumpingaftertheinitialstabilisingperiod.
3 Forthepipelinewatertest,thepipesshallbefilled
withwaterunderaheadofnotlessthan1.2mabovethe
crownofthepipeatthehighendandnotmorethan6mabovethepipeatthelowend.Steeplygradedpipelines
shallbetestedinsectionssothattheabovemaximumis
notexceeded.Thetestshallcommencenotlessthantwohoursafterfillingthetestsectionatwhichtimethelevel
ofwaterattheverticalfeedpipeshallbemadeupto
producetherequired1.2mminimumtesthead.Theloss
ofwaterovera30minuteperiodshallbemeasuredbyaddingwateratregular10minuteintervalstorestore
theoriginalwaterlevelandrecordingtheamountsso
added.Thedrainwillhavepassedthetestifthevolumeofwateraddeddoesnotexceedonelitreperhourper
linearmetreofdrainpermetreofnominalinternal
diameter.
4 (05/01)Allpipelineslessthan350mmdiameter,
excludingserviceductsshallbecheckedbydrawing
througheachcompletedlengthofpipeasphericalmandrelofadiameter10%lessthanthenominalbore
ofthepipesbeingtested.
5 (11/04)DuringtheprogressoftheWorksallexistingchambers,gulliesandroddingeyesshallbekeptclean
andfreefromobstruction.Oncompletionofthewhole
oftheWorks,allchambers,gulliesanddrainsincludingverge/surfacewaterdrainsandfilterdrainsbut
excludingallfinandnarrowfilterdrainsshallbe
flushedfromendtoendwithwaterandleftfreefromobstructions.Catchpitchambersshallbeleftcleanand
freefromsilt.UnlessotherwiserequiredinAppendix90/1(MCHW5.9.3)allcarrier,foulandfilterdrainsbutexcludingall
finandnarrowfilterdrainsshallbesurveyedbyClosed
CircuitTelevision(CCTV)inaccordancewiththerelevantrequirementsofSeries9000(MCHW5.9,Parts
1to5).Furtherguidanceisprovdedin
sub-ClausesNG509.4andNG509.5.
6 Thepipesandfiltermaterialoffilterdrainsshallat
alltimesbeleftcleanandfreefromsiltandobstruction.
7 WheredescribedinAppendix1/5,samplesofone
ormorepartlywatertightjointsforpipelinesuptoandincluding900mmdiametershallbetestedwithahead
ofwaterkeptlevelwiththecrownofthepipe.Thejointwillnotbeacceptediftheflowthroughthejointinlitres
perminuteexceeds20timesthesquareofthenominal
internaldiameterofthepipeinmetres.
8 Permeabilitytestsshallbeasdescribedin
Appendix5/1.
9 (05/01)Serviceductsshallbecheckedbydrawinga
woodenmandrel,asshownonHCDDrawingNumber
I2,throughastheductsarelaidbutwhereasethasto
begiventothelineofductsthewoodenmandrelshallbereplacedbyanironmandrel250mmlongbutofthe
samediameterasthewoodenversion.
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510 Srfe Wer chels driechel Bloks
1 Surfacewaterchannelsanddrainagechannel
blocksshallbeconstructedasdescribedin
Appendix5/3.
2 Surfacewaterchannelsshallcomplywith
Clause1103.
3 DrainagechannelblocksshallcomplywithClause1101.
511 L dris
1 (11/03)Existinglanddrainswhicharepermanently
severedbytheWorksshallbelocatedandconnected
intoanewdrain,pipeorditchallasdescribedinAppendix5/1.ThelengthsremainingwithintheWorks
shallbecleanedoutfromthenewdraintrenchfaceasnecessary.AnypipedisturbedbytheWorksshallbe
re-laidtoensureafreedischargeintothenewdrain.
DisusedendsofinterceptedlanddrainsshallbeadequatelysealedwithST2concreteincompliancewith
Clause2602.
2 Whereanexistinglanddrainisexposedandseveredbytemporarytrenchexcavation,theContractor
shallmarkthepositionofthedrainandrecordit.The
drainshallbedivertedintoanexistingdrainorwatercourse.Alternatively,thenormalfunctioningof
thedrainshallbecontinuedbytheconstructionofa
pipelineorchanneladequatelysupportedacrosstheexcavation,untilpermanentrestorationismadeonthe
originalline.
3 TheContractorshallnotifytheOverseeingOrganisationofanylanddrainwhichisblockedoris
otherwisedefectivewhenthedrainisfirstexposed.
4 Severedmoledrainsshallbeledstraightintonewdrains;alternativelytheyshallwhererequiredin
Appendix5/1beinterceptedbytheconstructionofa
landdrain.Wheretheyhavebeendisturbedmolechannelsshallbecleanedoutandfilledlocallywith
TypeAfiltermaterialorasotherwisedescribedin
Appendix5/1.
512 Bkfilli o Pipe Bys veres oBries
1 (05/04)UnlessotherwisedescribedinAppendix5/1,
fillingtopipebaysandvergesonbridgesshallbewell
gradedgranularmaterialnotexceeding20mmsize
containingnotmorethan3%ofmaterialpassingthe0.063mmsieveandwithauniformitycoefficientof
morethan5.Itshallbelaidandcompactedincompliancewithsub-Clause505.6and7.Thematerial
shallmeetthesulfaterequirementdescribedin
sub-Clauses503.4,503.5,505.4and505.5.
513 Permeble Bki o Erh ReiiSrres
1 UnlessotherwisedescribedinAppendix5/1,
permeablebackingshallconsistofoneofthefollowingmaterialsexceptwhenthefillingadjacenttothe
structureisselectedcohesivematerial(Class7A),
selectedconditionedpulverised-fuelash(Class7B)orchalk:
(i) Aminimumthicknessof300mmofgranular
materialcomplyingwiththerequirementsofClause505forTypeAorTypeCmaterial
and,inaddition,satisfyingthefollowingcriteria:
Pipingratio,definedas
15percentsizeofthedrainagematerial,
85percentsizeofthebackfillmaterial
Permeabilityratio,definedas
15percentsizeofthedrainagematerial,
15percentsizeofthebackfillmaterial
wherethepercentsizeofamaterialisthesizeof
particlecorrespondingtothegivenpercentordinateoftheparticlesizedistributiongraph.
(ii) Porousno-finesconcrete,castinsitu
225mmthickcomplyingwiththerequirementsofClause2603.
(iii) (05/08)Precasthollowconcreteblocks
complyingwiththeBSEN771-3laidin
stretcherbondwithdryjointsin225mmthickwallingwithholesvertical.
2 (11/03)Whenthefillingadjacenttothestructureis
selectedcohesivematerial(Class7A),selected
conditionedpulverised-fuelash(Class7B)orchalk,thepermeablebackingshallbeaminimumthicknessof
300mmof0/4or0/2,CPorMP,sandcomplyingwith
BSEN12620unlessotherwisedescribedin
Appendix5/1.
514 Fi dris
geerl
1 FindrainsshallcomplywiththisClauseandthe
specialrequirementsdescribedinAppendix5/4.
Thetermsthickness,width,heightandcoreshallhavethemeaningsindicatedonHCDDrawingNumberF18
unlessotherwisedescribedinAppendix5/4.
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Thetermfindrainshallmeanaplanargeocomposite
structuredesignedtoperformthesamefunctionasa
narrowfilterdrain.
2 Wherefindrainsaredesignedforlateralentryof
waterfromonesideonlytherequirementsforflowratesinsub-Clauses4and5ofthisClauseshallapplytothe
faceorplanedesignedtoadmitortransmitwater.
3 Thematerialsofwhichthedrainismadeshallbetreatedsothattheyareprotectedfromthedeleterious
effectsofshorttermexposuretoultravioletlight,and
shallberesistanttodegradationbyacids,alkalis,commonchemicals,bacteria,fungiandmoulds
occurringinsoilsandhighwayconstructionmaterials.
AfterexposuretoultravioletlighttheOverseeingOrganisationmayrequireevidencethatthematerials
stillcomplywiththerequirementsofthisClause.The
drainshallbeprotectedfromdamageandultravioletlightandbelabelledtoidentifythegradeand
manufacturerorsupplier.Wherenecessary,theside
intendedforentryofwaterandthedirectionofin-planeflowshallbeidentified.
geoexile
4 Thegeotextileshall:
(i) (11/03)inbothmachineandcross-machine
directions,sustainatensileloadofnotlessthan5.0kN/matbreakandhaveaminimum
failurestrainof10%whendeterminedinaccordancewithBSENISO10319;
(ii) (11/03)haveaminimumpunctureresistance
of1200Nwhendeterminedinaccordance
withBSENISO12236;
(iii) (11/03)haveaminimumtearresistanceof200Nwhendeterminedinaccordancewith
ASTMStandardD4533-91(1996);
(iv) haveasizedistributionofporeopeningssuchthattheapparentopeningsizeO
90when
determinedinaccordancewithBS6906:Part2,orotherappropriatetest,isasstatedinAppendix5/4;
(v) allowwatertoflowthroughit,ineither
direction,normaltoitsprincipalplaneatarateofnotlessthanthatstatedin
Appendix5/4underaconstantheadofwater
of100mmandamaximumbreakthroughheadof50mmwhendeterminedin
accordancewithBS6906:Part3.
composie dri
5 (05/01)Thecompositedrainshall:
(i) haveaflowratethrougheachfaceofthe
drainofmorethan75%ofthevalue
specifiedinsub-Clause4(v)ofthisClauseon
thesideorsideswhereinflowoccurs.This
valuemaybefoundbyeither:
(a) directmeasurementofthecomposite
drainusingamodifiedversionofBS6906:Part3;or
(b) calculationbasedontheflowrate
obtainedbythestandardtestin
BS6906:Part3andthepercentagecontactareaofthedrainagecore
obtainedfromsub-Clause13ofthis
Clauseorotherappropriatemethod;
(ii) havevaluesoflongtermin-planeflowrates
asstatedinAppendix5/4whendetermined
inaccordancewithsub-Clauses14and15of
thisClause.Thevaluesofhydraulicgradientandminimumappliedstressesshallbeas
giveninTable5/7.
taBLE 5/7: (05/01) applie Sresses (kn/m)
Hyrli grie
Hcd dri type 5 6 7 10
Sub-Clause14:
NormalStress
ShearStress
50
10
50
10
50
10
100
10
Sub-Clause15:NormalStress
100
100
100
100
Sub-Clause15:
Hydraulic
Gradient
0.1
1.0
1.0
1.0
0.1
1.0
Jois
6 Findrainsshallbecapableofbeingjointed
longitudinallyorlaterallyintopipesystemsorchambersforinflowandoutflowpurposesandbeselfjointing
eitherdirectlyorthroughpurposemadeattachmentpiecesforformingcontinuousdrainlengths.Allsuchjointsshallbeformedsoastopreventtheingressofsoil
particlesorotherextraneousmaterialintothedrain.
Findrainjointstransversetothedirectionofflowshallhavevaluesofin-planeflowratesnotlessthanthat
requiredbysub-Clause5(ii)ofthisClause.
Findrainjointsparalleltothedirectionofflowandanyexposededgesshallbeprotectedfromtheingressofsoil
byageotextilewrappingwithaminimumoverlapof
150mm.
Pipes
7 (11/06)FordrainType6pipesshallbeperforatedor
porousandcomplywithsub-Clause501.3.Pipes
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complyingwithBS4962:1989shallhaveaminimum
UltimatePipeStiffness(STES)valueof1400N/m2.
FordrainType7pipesshallbeunperforatedthermoplasticspipecomplyingwithBS4660,BS5481,
BSEN1401,BSEN1852-1orBSEN12666-1slottedlongitudinallyalongthetopsurfaceandstressrelieftreated(ifrequired)inaccordancewiththesystem
manufacturerspublishedspecification.
8 (05/01)Pipejointsshallcomplywiththe
requirementsoftherelevantBritishStandardforthepipeusedorClause518.
Bkfill Srro Meril
9 PipesurroundmaterialfordrainTypes6and7shall
complywithsub-Clause503.3(i)or503.3(ii)orTypeA
orCmaterialcomplyingwithsub-Clause505.3.
Wherefindrainsareinstalledinatrenchbackfill
materialshallbetheoriginalas-dugmaterialfromthe
trenchunlessotherwisespecifiedinAppendix5/4.
dimesios
10 (11/03)UnlessotherwisedescribedinAppendix5/4
thedimensionsofthefindrainshallbeasshownon
HCDDrawingsF18andF21.ThepipediametershallbeasstatedinAppendix5/4.Thedrainslopeangle(x),as
shownonDrawingF19,shallbenotgreaterthan15%
fromtheverticalunlessotherwisestatedinAppendix5/4.
Isllio Hli
11 InstallationoffindrainsshallbeasshownonHCD
DrawingNumbersF19toF21.Wherefindrainsare
assembledonsitetheassemblyareashallbecleananddryandfreeofwind-bornepollutants.Anymaterial
whichbecomescontaminatedmustbereplaced.No
geotextileorcorematerialshallbeexposedtodaylight
(oranysourceofultravioletradiation)foraperiodexceedingacumulativetotalof50hours.Anygeotextile
orcorematerialexposedtodaylight(oranysourceofultravioletlight)foraperiodexceedingacumulativetotalof50hoursshallbereplacedunlessitcanbe
demonstratedthatthematerialsofthedrainstillcomply
withtherequirementsofthisClause.
Wherefindrainsarelaidintrench,thetrenchbottom
shallbefreeofirregularitiesandtotherequiredlevels
giveninAppendix5/4.Rockandotherhardprotuberancesshallberemovedandanyexcesscutin
thetrenchbottomfilledandcompactedbacktothe
requiredgradewithsuitableexcavatedorimported
material.Thedrainshallbelaidwiththeappropriatefaceagainst
thesideofthetrenchadjacenttothecarriagewayandin
theappropriatedirection.Thissideofthetrenchshall
havewallssufficientlycleantoenablethefindrainto
comeintoclosecontactwiththewallwhenthetrenchis
backfilledandcompacted.CompactionshallbeinaccordancewithClause612.Findrainsinstalledaspart
ofthePermanentWorksshallbeprotectedfromsurface
water,contamination,andaccidentaldamageduringconstruction.
Thefindrain,pipesurroundandbackfillshallbe
installedsoastocausenodamagetothefindrain.Whereanydamagedoesoccur,thedamagedmaterials
shallbereplacedbynewmaterial.
Aftertheinstallationofthefindrainhasbeencompletedamarkertapeshallbelaidapproximately75mmabove
thefindraininthepositionshownonHCDDrawing
NumbersF19andF20.Thetapesshallbegreenself-colouredPVCorpolytheneplasticnotlessthan0.1mm
thickand150mmwide.
Ieifiio
12 TheContractorshallobtainandmakeavailablethe
followinginformationforeachseparateconsignmentoffindraindeliveredtoSite:
(i) geotextileandcorename,grade/numberand
massperunitarea;
(ii) namesandaddressesofsystemproducer,and
geotextile,coreandpipemanufacturers;
(iii) manufacturingcharacteristicsand
constituentsofgeotextileandcore.Thisshallincludecompositionandtypeofconstituent
filaments,threads,fibres,films,tapesand
othercomponents;
(iv) consignmentnumberanddeliverydate;
(v) acopyofthesitedeliverynote.
tes Meho for he Peree co are of
drie core
13 (i) Thetestdeterminestheareaofonefaceofadrainagecorewhichwillbeincontactwitha
geotextilefilterasapercentage.
(ii) Theapparatusrequiredisasfollows:
(a) loadingdeviceabletoapplya
compressiveloadofatleast2kNand
havingaflatsteelbase;
(b) flatsteelloadingplate200mmx200mm;
(c) printersinkandroller(orpad);(d) sheetofthincompressiblerubber;
(e) planimeter.
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(iii) Thetestprocedureshallbeasfollows.Cut
threerepresentativetestspecimens200mm
x200mm(2mm).Applyinktoone200mmx200mmfaceofaspecimenand
coverwithasheetofplainpaperandathincompressiblerubbersheet.Placethepreparedspecimenintotheloadingdevice
andgraduallyapplytheloadof2kNand
maintainfor5minutes.Releasetheloadandremovethespecimenandseparateitfromthe
paper.Usingtheplanimeterfindthetotal
areaofthepaperwhichhasreceivedanimprint.Repeatforallspecimens.
(iv) Thepercentagecontactarea=
totalareaofimprint
areaoftestspecimen
(v) Thereportshallinclude:
(a) areferencetothismethod;
(b) sampleidentificationdetails;
(c) individualandmeanpercentagecontact
areas;
(d) detailsofanydeviationfromthe
specifiedtestprocedure.
(vi) Alternativemethodsofdeterminingthe
percentagecontactareamaybeemployedwiththepriorapprovaloftheOverseeing
Organisation.
tes Meho for deermii he thikess of Fi
dris uer Speifie norml Sher Sresses
14 (i) (05/01)Thetestdeterminesthethicknessof
thefindrainundersustainednormalandshearstresses.Alongtermthickness(at
100,000hours)iscalculatedbyextrapolation
andashorttermequivalentnormalload
whichproducesthelongtermthicknessis
determined.
(ii) Theapparatusrequiredisasfollows:
(a) asuitablecompressiontestingmachine,whichshallhaveaverticaltravelat
leastthenominalthicknessofthe
specimen.Itshallbecapableofsustainingthenecessaryloadstowithin
1%accuracyforthedurationofthetest;
(b) thecompressiontestingapparatus,whichshallincludeafixedbaseplate
andparallelmoveabletopplatewithflatsteelsurfacewithsufficientfrictiontopermitthedevelopmentoftherequired
shearforces;
(c) ameansofmeasuringthemean
thicknessofthespecimentoanaccuracyof0.01mm.
Asanalternativeto(a)and(b),anappropriateinclined
planeandkentledgesystemmaybeemployedtoproducethenormalandshearloads.
Thetestprocedureshallbeasfollows:
(iii) Cutsixrepresentativespecimensofminimumsize100mmx100mm
symmetricallyaboutthecoredesign.Three
specimensshallbetestedinaccordancewith(v)belowandthreeinaccordancewith(vi)
below.
(iv) Thetestspecimenshallbeplacedsymmetricallyonthebaseplateandcovered
bythetopplate.Themeansofmeasuring
thicknessshallbeattachedandtheinitialthicknessmeasured.
(v) (11/03)Applytheloadsmoothlyandasquicklyaspossibletothetopplate.Thefull
load(normalandshear)shallbeappliedin
lessthan20secondsandsustainedforatleast1000hours.Theappliedstressesshallbe
thosegiveninTable5/7.Atleastfour
measurementsofthicknessshallbemadeduringeachunitoflogarithmictimeafterthe
firstminute.Determinethelongtermthicknessofthespecimenasthethicknessofthespecimenat1000hoursreducedby2T
whereTisthedifferenceinthicknessesof
thespecimenthicknessrecordedat100hoursand1000hours.Repeatthetestonthetwo
otherspecimens.Thetestspecimensshallbe
maintainedataconstanttemperatureof
20C2Cthroughoutthetestperiod.
(vi) Applyincreasingincrementsofnormalload
tothespecimen.Determinetheshortterm
equivalentloadwhichshallbetheloadwhichwhenappliedforaperiodof205
minutesproducesaspecimenthicknessequal
(withinanaccuracyof0.05mm)tothelongtermthicknessofthespecimenobtainedat
(v)above.Repeatthetestontheothertwo
specimens.
(vii) Thereportshallinclude:
(a) areferencetothismethod;
(b) sampleidentificationdetails;
(c) theinitialthicknessofthesample;
(d) theappliedload;
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(e) thethicknessofeachsampleat100and
1000hoursandthemeanofthethree
results;
(f) aplotofpercentagereductionin
thicknessagainstlogarithmictime;
(g) themeanlongtermthickness;
(h) themeanshorttermequivalentload;
(i) anydeviationsfromthespecifiedtest
procedure.
deermii I-ple Flow uer compressie
Loi
15 (05/01)In-planeflowshallbedeterminedinaccordancewithBS6906:Part7exceptthatthe
followingconditionsshallapply:(a) theappliednormalstressshallbethegreater
ofthevaluegiveninTable5/7
(forsub-Clause15)orthemeanshortterm
equivalentstressasdeterminedinsub-Clause14(vi)ofthisClause;
(b) thesampleshallbetestedsuchthatthe
measuredflow(orflows)isinthesamedirectionastheprincipalflow(orflows)
whenthefindrainisinservice;
(c) thefoamrubberoptionofthetestprocedure
shallbeused(detailsofthefoamrubbertobeusedmaybeobtainedfromthe
OverseeingOrganisation);
(d) thehydraulictransmissivityshallbereported
foreachofthehydraulicgradientsemployed.
tes Mehos
16 Notwithstandingtherequirementsof
sub-Clauses13,14and15ofthisClause,variationsin
thetestmethodsspecifiedthereinshallbemadewheredeemednecessarybytheBritishBoardofAgrment
followingconsultationwiththemanufacturer.Allsuchvariationsshallberecordedinthereport.
cerifiio
17 Findrainsandconstituentmaterialsshallhavea
currentBritishBoardofAgrmentRoadsandBridgesCertificatecertifyingtheappropriatephysicalproperties
whentestedinaccordancewiththisClause.
515 nrrow Filer dris
geerl
1 NarrowfilterdrainsshallcomplywiththisClauseandthespecialrequirementsdescribedinAppendix5/4.
ThetermnarrowfilterdrainreferstodrainTypes8or9
indicatedintheHCDDrawingNumberF18.They
consistofaporousorperforatedpipelaidinanarrowtrenchsurroundedbygranularmaterialwherethe
granularmaterialand/orthepipeisenclosedbyalayerofgeotextilefilter.Narrowfilterdrainsandfindrainsperformthesamefunction.
Merils
2 Thegeotextilematerialsusedinthedrainshallbe
storedsothattheyareprotectedfromthedeleterious
effectsofshorttermexposuretoultravioletlight,andshallberesistanttodegradationbyacids,alkalis,
commonchemicals,bacteria,fungiandmoulds
occurringinsoilsandhighwayconstructionmaterials.AfterexposuretoultravioletlighttheOverseeing
OrganisationmayrequireevidencethatthematerialsstillcomplywiththerequirementsofthisClause.Theyshallbeprotectedfromdamageandultravioletlightand
belabelledtoidentifythegradeandmanufactureror
supplier.
3 Thegeotextileusedinnarrowfilterdrainsshallcomplywithallrequirementsofsub-Clause514.4for
geotextilesusedinfindrains.
FordrainType8thegeotextilesurroundtothepipeshallconsistofaprefabricatedcontinuousclosefitting
sock.Alternativelythepipeshallbefirmlywrappedina
singlelayerofgeotextilewithanoverlapofbetween50and75mmandsecuredaroundthepipeinamanner
soastopreventtheingressofsoilparticlesorother
extraneousmaterialandwithoutaffectingthepermeabilityofthewrappedmaterial.Splicesbetween
lengthsofsockorlayershallhaveoverlapswithinthese
dimensionsandbesecurelytied.
FordrainType9thegeotextilesurroundtothegranular
materialshallhaveaminimumoverlapof250mm
including100mmdown-tuck.Splicingoflengthsofgeotextileshallconsistofminimum600mmoverlap
securedwithpinsormechanicalties.Whereanoutletpipepassesthroughthegeotextileaseparatepieceofgeotextileshallbewrappedroundtheoutletpipe,flared
againstthegeotextileinthefilterdrainandsecured.
Wheredrainlengthsareterminatedatchambers,thegeotextileshallbesecuredagainstthechamberwallsby
suitablemeanssoastopreventtheingressofsoil
particlesorotherextraneousmaterialintothedrain.
4 (05/01)Pipesandfittingsshallcomplywithsub-Clauses514.7and514.8.Wherecoilablepipesto
BS4962:1989areusedtheyshallbecapableofbeing
straightenedsoastolieflatwithoutrestraintinthe
trenchbottombeforebackfilling.
5 (11/03)Thegranularmaterialusedfortrenchinfill
shallcomplywiththerequirementsfornon-plasticity,
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LAcategoryandsulfatecontentofsub-Clause505.3
andhaveagradingwithinthelimitsofTable5/8.The
materialwhentestedinaccordancewithsub-Clause509.8shallmeetthepermeabilityrequirements
describedinAppendix5/4.taBLE 5/8:(11/03)nrrow Filer dri: treh
Ifill gri Reqiremes
HCDDrainType 8 9
MaximumParticleSize
mm
40 40
D5Sizemm >0.125 >0.125
D15Sizemm Asstatedin
Appendix5/4
-
D85Sizemm - >HoleDiameteror1.2Times
WidthofSlotin
Pipe
UniformityCoefficient 5to12 5to12orifCu1mm
Dn=Sievesizepassingn%byweightofmaterial
dimesios
6 UnlessotherwisedescribedinAppendix5/4thedimensionsofthenarrowfilterdrainshallbeasshown
onHCDDrawingNo.F18.ThepipediametershallbeasstatedinAppendix5/4.Thedrainslopeangle(x),asshownonDrawingF20,shallbenotgreaterthan15%
fromtheverticalunlessotherwisestatedin
Appendix5/4.
Isllio Hli
7 NarrowfilterdrainsshallbeinstalledasshownonHCDDrawingNumberF20.Beforeduringandafter
installationthegeotextileshallbeprotectedfrom
contamination,damageandexposuretoultraviolet
radiationinaccordancewithsub-Clause514.11.
Theexcavatedtrenchbottomshallbefreeof
irregularitiesandtotherequiredlevelsgivenin
Appendix5/4.Rockandotherhardprotuberancesshallberemovedandanyexcesscutinthetrenchbottom
filledandcompactedbacktotherequiredgradewith
suitableexcavatedorimportedmaterial.DrainType9shallhavetrenchwallssufficientlycleantoenablethe
geotextiletocomeintoclosecontactwiththewallwhen
thegranularmaterialisplacedinsideit.Thedepositionandcompactionofinfillshallbeinaccordancewith
sub-Clause505.4forfilterdrains.
NarrowfilterdrainsinstalledaspartofthePermanentWorksshallnotbeusedforthedisposalofsurfacewater
run-offduringconstruction.Narrowfilterdrains
exposedtosurfacewateringressshallbetemporarily
protected.
Markertapesshallconformandbeinstalledin
accordancewithsub-Clause514.11.
8 TheContractorshallobtainandmakeavailablethe
informationrequiredinsub-Clause514.12inrespectof
thegeotextileandpipe.
cerifiio
9 ThegeotextileshallhaveacurrentBritishBoardofAgrmentRoadsandBridgesCertificatecertifyingthe
appropriatephysicalpropertieswhentestedin
accordancewiththisClause.
516 combie drie Kerb Sysems
(11/04) geerl
1 (11/04)Combineddrainageandkerbsystemslisted
inAppendix1/11shallbetreatedasotherfeaturestobedesignedbytheContractor.Combineddrainageand
kerbsystemsshallconformtoBSEN1433andtothe
specialrequirementsinAppendix5/5.
2 (11/04)Combineddrainageandkerbsystemsshall
besuitablefortheirintendeduseandplaceof
installationintheWorksandasstatedinAppendix5/1.
TheContractorshallprovideevidenceofsuchsuitabilityforthepurposetotheOverseeing
OrganisationinaccordancewithAppendix1/5.
3 (11/04)DesignflowsgiveninAppendix5/5shallbe
accommodatedwithoutsurchargewithinthemain
combineddrainageandkerbsectionandbeneaththe
undersideofanyinletslotsections.
4 (11/04)Whereapplicable,thewidthanddepthof
combineddrainageandkerbsystemunitsshallnot
exceedthedimensionsgiveninAppendix5/5.
5 (11/04)Whenusedadjacenttoporousasphalt
surfacingmaterials,unitsshallincorporatesideentry
inletstopermitdrainageofwaterheldwithintheproousasphalt.Inletsshallcomplywiththerequirementsof
Appendix5/5andshallhavethecapacitytodrain
porousasphalt.
(11/04) clssifiio
6 (11/04)Combineddrainageandkerbsystems,
excludingin-situsystem,shallbeclassifiedasfollowsaccordingtotheirintendeduseandshallbeasstatedin
Appendix5/5:
(i) C250:
(ii) D400;and
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(iii) where,exceptionally,combinedkerband
drainageunitshavetobelocatedinareas
subjectedtolargenumbersofhighspeedheavygoodsvehicles,ClassE600combined
kerbanddrainageunitsshallbeconsidered.(11/04) Wer tihess
7 (11/04)Jointsbetweenunitscomprisingthesystem
andbetweenthechannelandunits,shallbedesignedto
avoidleakageofsurfacewater.Jointsbetweenbridgedeckwaterproofingandcomponentpartspassing
throughthewaterproofingshallbewatertight.Sealants
shallbecompatiblewiththewaterproofingsystem.
(11/04) Isllio Hli
8 (11/04)Combineddrainageandkerbsystemsshall
belaidandjointedinaccordancewiththe
manufacturerswritteninstructions.
9 (11/04)Adjacentcarriageway,footway,vergeor
centralreservetobedding,backing,surroundingor
jointingofcombineddrainageandkerbunitsshallbeinaccordancewiththemanufacturerswritteninstructions.
10 (11/04)Junctions,connectingpipesandotherfittings
comprisingthecombineddrainageandkerbsystemshallcomplywithsub-Clause501.3andshallbeas
describedinAppendix5/5.Thecombineddrainageand
kerbsystemshallincorporatemeasurestoenableroddingoftheoutfallpipeworkandadequateaccessfor
jettingbywaterjettingequipmentintothesystem.
(11/04) clei
11 (11/04)Combineddrainageandkerbsystemsshall
becleanedoutbyappropriatemeansandshallbeleft
cleanandfreefromallobstruction.Thecompleted
combineddrainageandkerbsystemsshallbesurveyedbyClosedCircuitTelevision(CCTV)inaccordance
withtherelevantrequirementsofSeries9000(MCHW
5.9,Parts1to5).
517 Lier drie chel Sysems
geerl
1 (11/04)ThelineardrainagechannelsystemslistedinAppendix1/11shallbetreatedasotherfeaturestobe
designedbytheContractor.Thein-situlineardrainage
channelsystemsshallconform,whereapplicable,tosub-Clauses517.2to517.17andtherequirementsin
Appendix5/6andAppendix1/11asappropriate.The
prefabricatedlineardrainagechannelsystems,whereapplicable,shallconformtoBSEN1433andwiththe
otherrequirementsinAppendix1/5.
2 (11/04)Lineardrainagechannelsystemsshallbe
suitablefortheirintendeduseandplaceofinstallationintheWorks.TheContractorshallprovideevidenceof
suchsuitabilityforthepurposetotheOverseeing
OrganisationinaccordancewithAppendix1/5.
3 DesignflowsgiveninAppendix5/6shallbe
accommodatedwithoutsurchargewithinthemain
channelsectionandbeneaththeundersideofanyinletslotsections.
4 (11/04)Whereapplicable,thewidthanddepthof
lineardrainagechannelsystemunitsshallnotexceed
thedimensionsgiveninAppendix5/6.
5 (11/04)Dimensionsofinletslotsshallcomplywith
thefollowingcriteria:
(i) forprefabricatedlineardrainagechannelsystemstheyshallconformtoBSEN1433;
(ii) forin-situlineardrainagechannelsystems
theyshallconformtoBSEN1433.
6 (11/04)Whenusedadjacenttoporousasphalt
surfacingmaterials,unitsshallalsoincorporateside
entryinletstopermitdrainageofwaterheldwithintheporousasphalt.Inletsshallcomplywiththe
requirementsofAppendix5/6andshallhavethe
capacitytodrainporousasphalt.
(11/04) Weheri Resise
7 (11/04)Markingrelatingtothegradeofweathering
resistancefordrainagechannelsmadeofconcreteshallbeasstatedinAppendix5/6.
(11/04) clssifiio
8 (11/04)lineardrainagechannelsystemsshallbeclassifiedasfollowsaccordingtotheirintendeduseand
shallbeasstatedinAppendix5/6:
(i) C250;
(ii) D400;and
(iii) where,exceptionally,lineardrainagechannel
systemshavetobelocatedinareassubjected
tolargenumbersofhighspeedheavygoodsvehicles,ClassE600combinedkerband
drainageunitsshallbeconsidered.
(11/04) Wer tihess
9 (11/04)Jointsbetweenunitscomprisingthesystem
andbetweenadjacentconstructionandthesystemshall
bedesignedtoavoidleakageofsurfacewater.Whereapplicable,jointsbetweenbridgedeckwaterproofing
andcomponentpartspassingthroughthewaterproofingshallbewatertight.Sealantsshallalsobecompatiblewiththewaterproofingsystem.
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10 (11/04)Junctions,connectingpipesandotherfittings
comprisingthelineardrainagechannelsystemshallcomplywithsub-Clause501.3andshallbeasdescribed
inAppendix5/6.Thelineardrainagechannelsystem
shallincorporatemeasurestoenableroddingoftheoutfallpipeworkandadequateaccessforjettingby
waterjettingequipmentintothesystem.
(11/04) clei
11 (11/04)Thelineardrainagechannelsystemsshallbe
cleanedoutbyappropriatemeansandshallbeleftclean
andfreefromallobstructiononcompletionoftheWorks.Thecompletedlineardrainagechannelsystems
shallbesurveyedbyClosedCircuitTelevision(CCTV)
inaccordancewiththerelevantrequirementsofSeries9000(MCHW5.9,Parts1to5).Furtherguidanceis
providedinsub-ClausesNG509.4andNG509.5.
Mfre Sysems
12 (11/04)ManufacturedsystemsshallconformtoBSEN1433.
I Si Sysems
13 (11/04)In-situsystemsshallcomplywiththerequirementsofsub-Clauses1103.1,1103.3and1103.4.
Theyshallalsocomplywiththerequirementsof
sub-Clause1103.2exceptthattheconcreteshallbe
consideredasplainconcretewithinthetermsofthissub-Clause,irrespectiveoftheinclusionof
reinforcement.
14 (11/04)In-situsystemsshallbeslipformedexcept
forsectionsatgullieswhichshallbehandformed.Full
depthjointsshallbeconstructedattheinterfaceateach
sideofgullieswitha25mmthickfillerboardcomplyingwithClause1015andsealedinaccordance
withClauses1016and1017.
15 (11/04)Thecentralvoidmaybeformedbyaninflatedtubewhichisthenremoved,orbyaninsitu
suitablepipeorsimilarformerfitforthepurpose.Atgullypositionstheinnerformershallbepre-sleevedwithasuitablepipeorsimilarformerfitforthepurpose
whichshallbeofsufficientlengthtooverlapthetwo
jointsoneithersideofthegully.
16 (11/04)Thecentralvoidshallbecheckedinaccordancewithsub-Clause509.4.Verificationofslot
widthsshallbedeterminedbysuitabletemplates.
17 (11/04)ReinforcementshallcomplywithSeries1700.Covertoreinforcementshallbenotlessthan
75mm.
18 (11/04)Triallengthsandtestingofin-situchannelsshallbeundertakeninaccordancewithclauses6and8.6
ofBS5931andtherelevantparagraphsofclause9of
BSEN1433respectively.
518 (05/01) thermoplsis Srre WllPipes Fiis
geerl
1 ThermoplasticsstructuredwallpipeshallcomplywiththisClauseandthespecialrequirementsdescribedinAppendix5/1.
Thetermstructuredwallpipeshallmeanalltypesof
smoothborepipeexceptsolidwallhomogeneouspipe.Typicalformsofconstructionclassifiedasstructured
wallpipesinclude:singlewallexternallystructured
smoothbore,twinwall,foamedcoreandspirallywound.
Thetermfittingshallmeanaproductusedin
conjunctionwiththepipetoformthesystembut
excludinggulliesmanholechambers,inspectionchambersandaccesschambers.
Merils
2 Thematerialsfromwhichthepipeandfittingsare
made,shallbetreatedsothattheyareprotectedfromthedeleteriouseffectsofshorttermexposureto
ultravioletlight,andshallberesistanttodegradationby
acids,alkalis,commonchemicals,bacteria,fungiandmouldsoccurringinsoil,highwayconstruction
materialsandhighwaydrainagesystems.Inaddition,
thematerialsfromwhichthepipeandfittingsaremade,shallnotincorporateanyadditivesinquantitiessufficienttocausemicrobiologicaldegradationorto
impairtheconformitytothechemical,physicaland
mechanicalpropertiesorimpactresistancerequirementsgiveninsub-Clause5ofthisClause.Thespecification
oftherawmaterialshallbeagreedbetweenthe
certificationbody,asdefinedinsub-Clause15ofthisClause,andthemanufacturerandmayincorporate
re-processableand/orrecyclablematerial.Theagreed
specificationshallincorporatetolerancesforeachoftherelevantcharacteristicsdefinedintheappropriateclause
ofprEN13476.TheContractorshallsubmittotheOverseeingOrganisation,priortocommencementoftheWorks,completedinformationsheetsinaccordance
withAppendix5/7.
dimesios
3 Systemsforcarrierdrainageshallbebetween
150mmand900mmnominalinternaldiameter.Pipesfornarrowfilterdrainsshallbe110mmor150mm
nominalinternaldiameter.Pipesforserviceductsshall
havenominalinternaldiametersofbetween50mmand
150mm.Pipesforsub-soildrainageshallincorporate
slotsorholeswithaminimumcrosssectionalareaof1000mm2permetrerunofpipe.
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Volume1 Series500SpecificationforHighwayWorks DrainageandServiceDucts
Theboreofthepipeandfittingsshallbeinaccordance
withthestandardtolerancesfornominalboresgivenin
BSEN476.
appere
4 (05/06)Thesystemshallhaveasmoothboreandbe
freefromanyburs,flashorotherinconsistenciesthatcouldhaveadetrimentaleffectontheperformanceof
thesystem.Pipesandfittingsfordrainageshallbe
externallycolouredeitherterracottaorblack.Thecolour
ofductingpipesshallbeinaccordancewithNational
JointUtilitiesGrouppublicationGuidelinesonthePositioningandColourCodingofUtilitiesApparatus.
AnyvariationinthecolourshallbedescribedinAppendix5/2.
Srre Wll Pipe
5 ThestructuredwallpipeshallhavethepropertiesdefinedinTable5/9.
Amendment-May2006 22
taBLE 5/9:(11/03)Reqiremes for Srre Wll Pipe
Propery Rele Sr Reqireme
General BSENISO2897-1,BSENISO2897-2and
BSISO11922-1
Dimensionstobespecified
Ringstiffness BSENISO9969 6kN/m2minimum.Lowerstiffnessvaluesarepermittedifdesign
calculationstoBSEN1295-1(UKnationalannex),basedonsite
specificinstallationconditions,indicatesatisfactoryperformance.)
CreepRatio BSENISO9967 PVC-U -maximum2.5
PPandPE -maximum4.0
Highvolumelowpressurejetting WRcJettingTestMethod Minimumacceptablefailurepressure137bar.
Longitudinalbending sub-Clause518.11 Pipeswithnominaldiameters350mmtohaveadifferencein
dimensionswhenmeasuredintheverticalaxisoflessthan5%of
thepipelengthandnolocalpermanentdeformationoccursduring
thetest.
Impactresistanceat0C BSEN1411withd25striker
of1kg
Preliminarytesttest10piecesasdescribedinBSEN1411,
droppingthestrikerfromaheightof1m.Ifanytestpiecesfail,
subjectthepipetothefulltestgiveninclause7.3ofBSEN1411
startingthestrikerfromadropheightof400mm.Themeanminus
1.64timesthestandarddeviationmustexceed1m.
Impactresistanceat23C BSEN1411withstrikeras
above
Valuetobederivedfromthesamebatchofpipeasusedinthe
impactresistancetestat0C.TheH50(mean)value-10%tobe
usedastheminimumvalueforqualitycontroltesting.
Alternativelythe0CtestcanbeusedasaQCtestifthe
manufacturerchooses.
Roddingresistance sub-Clause518.12 Pipeswithnominaldiameters350mmtohaveanaveragefailureenergy>3joules
Staticfrictioncoefficient(ducts) TS12-24 Pass
Creepatelevatedtemperature
(ducts)
BSENISO9967 Testtobecarriedoutat45C,creepratiotobelessthan2timesthe
valuestoBSENISO9967.
Resistancetopointloads(ducts) sub-Clause518.13 Noperforationat10%rodtravel
Tensilestrengthofaseam BSEN1979 prEN13476
Fiis
6 ThefittingsforusewithstructuredwallpipeshallhavethepropertiesdefinedinTable5/10.
7/22/2019 UK Specification Highways Series 0500
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Volume 1Specification for Highway Works
Series 500
Drainage and Service Ducts
TABLE 5/10: (11/03) Requirements for Fittings
Property Relevant Standard Requirement
General BS EN ISO 2897-1, Dimensions to be specified
BS EN ISO 2897-2 and
BS EN ISO 11922-1
Ring stiffness (excluding ISO 13967 6 kN/m2 minimum
couplers)
Rodding resistance sub-Clause 518.12 Fittings with nominal diameters 350 mm to have an average failure
energy >3 joules
Strength and flexibility of BS EN 12256 BS EN 12256
fabricated fittings
Impact resistance (drop test) Drop Test to BS EN Fall height 1000 mm at a temperature of 0C. Product less than ND
12061: 1999 300 shall show no damage. Others may fail but must be identified
as handle with care
Watertightness of fabricated BS EN 1053 0.5 bar for 1 minute
fittings
Pipe and Fittings
7 The pipe and fittings shall have the propertiesdefined in Table 5/11.
TABLE 5/11 (11/03) Requirements of the Systems
Property Relevant Standard Requirement
Leaktightness of joints - diameter BS EN 1277 Method 4 Use default values from BS EN 1277
distortion (watertight joints) Condition B Temperature
(23 2)C
Leaktightness of joints - angular BS EN 1277 Method 4 Use default values from BS EN 1277
deflection (watertight joints) Condition C Temperature
(23 2)C
Leakage rate from partially- sub-Clause 509.7 Less than 20 times the square of the ID of the pipe in metres shall
watertight joints flow through the joint in litres per minute
Resistance to wheel loads BS EN 1437 adapted to Less than 5% deformation when loaded to 100 kN (for unequalsuit HA loading conditions branches only)
23Amendment - November 2004
Bedding, Backfill and Surround Material
8 (11/03) All systems shall be installed in accordance
with the pipe and bedding combinations given inAdvice Note HA 40 (DMRB 4.2.5). Other combinations
shall be supported by calculations in accordance with
BS EN 1295-1 UK National Annex. Bedding, backfilland surround materials are classified in Clause 503 and
Clause 505.
Installation and Handling
9 The bedding, surround and backfill shall be
installed so as to cause no damage to the pipes and
fittings. Installation of the pipe and fittings, particularly,procedures for preparation and execution of jointing
operations, shall be in accordance with themanufacturers instructions.
7/22/2019 UK Specification Highways Series 0500
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Volume 1Specification for Highway Works
Series 500Drainage and Service Ducts
Identification
10 The Contractor shall maintain records with the
following information for each separate consignment ofstructured wall pipe or fittings delivered to Site:
(i) system name, ring stiffness grade/numberand size;
(ii) name and address of the system
manufacturer;
(iii) consignment number and delivery date; and
(iv) a copy of the site delivery note.
Test Method for Longitudinal Bending
11 (i) The test specimen shall be a six metre lengthof pipe or the maximum length available
from the manufacturer (if less than sixmetres).
(ii) The apparatus shall include:
(a) two level support blocks at least
250 mm wide and of sufficient height toallow the pipe to sag over its length
without touching the ground;
(b) a means of measuring the vertical
distance between the pipe at the centreof the span and a fixed point of
reference to an accuracy of 0.5 mm.
(iii) The test procedure shall be as follows:
(a) condition the specimen for at least
1 hour at 23C 2C;
(b) set the supports at a distance apart equal
to the length of pipe minus 500 mm;
(c) place the pipe symmetrically on the
supports;
(d) measure the distance between the top of
the supports and the fixed point of
reference, in the vertical axis throughthe centre line of the pipe;
(e) after a period of two minutes measure
the distance between the underside ofthe pipe at mid span and the fixed point
of reference;
(f) record the difference in readings as a
percentage of pipe length.
24Amendment - November 2004
Test Method for Rodding Resistance (Internal
Puncture)
12 (i) The test specimens shall be:
(a) twenty specimens cut from the
structured wall pipe, each specimen tobe 242 mm to 246 mm in length and a
quarter section of the circumference or;
(b) twenty specimens cut from a number ofidentical fittings.
(ii) The apparatus shall include:
(a) a standard drop weight pipe testing
apparatus capable of dropping a tupfrom a height of 1 m;
(b) a 300g tup which can be varied in 30g
multiples with a striker consisting asteel rod 18 mm in diameter with a
9 mm hemispherical end;
(c) a 250 mm x 250 mm box containing dry
Leighton Buzzard sand (Garside quarry)
such that there is at least 100 mm of
sand beneath the test specimen whenbedded down.