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7/27/2019 ROMTECH Product Guide.pdf
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Product Guide
Specialist supplier of construction solutions
7/27/2019 ROMTECH Product Guide.pdf
2/72www.rom-tech.co.uk
Specialist supplier of construction solutions
Welcome to the new ROMTECH Product & Service Guide
Since our inception in 2000 ROMTECH has become the UKs leading specialist in
Ground Engineering construction products.Our success is built on an unwavering commitment to:
Outstanding service levels
Customer or site support and problem resolution
Increased site efficiency
and most importantly
The growing necessity to reduce on-site risk.
Working closely with our customers we continue to develop innovative products, whilst striving to improve
site safety and enhance on-site productivity through temporary works solutions and creative thinking.
We have focused our expertise on Ground Engineering, from Piled Foundations to TunnellingSystems. Our objective is to resolve problems or difficulties faced in design or on-site, converting
these into opportunities and solutions for our customers.
Health and Safety
With increasing demands for risk removal from the working environment, we have pro-actively
developed a range of products which are calibrated to provide high levels of site safety and
operational efficiency. Our aim is to provide ROMTECH customers with the confidence and
assurance that our products are manufactured in accordance with the highest standards and are
supported by dynamic levels of service.
These include:
Radical LOLER compliant off load systems. Eliminating climbing on vehicles both at our plantand on site
Temporary works innovations which significantly increase site productivity and safety, such as
the non intrusive SAFE-SPLICE system for the safe connection of pile cages. This has been
successfully utilised on many major prestigious UK projects
Our specialist expertise also includes:
Close liaison with site engineers utilizing 25-years experience operating within the piling sector
Recently introduced soil nails and DCP ground anchors
Prefabricated ground beams
As-built CAD drawings
Please call us if theres a project you have in mind.
Tony StumpfManaging DirectorROMTECH Ltd
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Projects were proud to have been associated with:
Wembley National Stadium
Kings Cross Northern Ticket Hall
White City Retail Development, West LondonCTRLs 230, 240, 310, 320 & 430 & 440
Terminal 5 - Heathrow Airport
Contents
Piling
Piling 7-27
Geotechnical
Geotechnical 33-51
Additional Information
Depot location 71Index 72Terms & Conditions 73
Reinforcement
Shape Codes 4
Weights and Areas of Reinforcement 5
Standard Fabric Chart 6
Prefabrication 28
Lenton / Ancon / MBT Couplers 29-30
The ROMTECH Shear Ladder System 31
Groundworks
Groundworks 53-70
Tunnelling and Mining
Tunnelling and Mining 52
Formwork Accessories
Tie Bar System 32
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ReinforcementStandard Fabric
PilingIntroduction
Reinforcement ChartsWeights and Areas of Reinforcement
s-sectional Areas of Groups of Bars (mm2)
s-sectional Areas for Specific Spacings in mm2/ Metre Width
ghts for Groups of Bars (kg/metre run)
ght per m2 in one direction (Add both directions for t otal m2 weight)
ize Number of Bars (millimetres) *Denotes non-preferred sizes
75 100 125 150 175 200 225 250 275 300
m* 377 283 226 188 162 141 125 113 103 94
m 670 503 402 335 287 251 223 201 183 168
m 1047 786 628 524 449 393 348 314 285 262
m 1508 1131 905 754 646 565 503 452 411 377
m 2681 2011 1608 1340 1149 1005 894 801 731 670
m 4189 3142 2513 2094 1795 1571 1396 1257 1143 1047
m 6545 4909 3927 3272 2805 2454 2182 1963 1785 1636
m - 8042 6434 5362 4596 4021 3574 3217 2924 2681
m - - 10053 8378 7181 6283 5587 5027 4571 4189
m* - - - 13090 11220 9617 8727 7854 7140 6545
ize Number of Bars *Denotes non-preferred sizes
1 2 3 4 5 6 7 8 9 10
m * 0.222 0.444 0.666 0.888 1.11 1.332 1.554 1.776 1.998 2.22
m 0.395 0.79 1.185 1.58 1.975 2.37 2.765 3.16 3.555 3.95
m 0.616 1.232 1.848 2.464 3.08 3.696 4.312 4.928 5.544 6.16
m 0.888 1.776 2.664 3.552 4.44 5.328 6.216 7.104 7.992 8.88
m 1.579 3.158 4.737 6.316 7.895 9.474 11.053 12.632 14.211 15.79
m 2.466 4.932 7.398 9.864 12.33 14.796 17.262 19.728 22.194 24.66
m 3.854 7.708 11.562 15.416 19.27 23.124 26.97 30.832 34.686 38.54
m 6.313 12.626 18.939 25.252 31.565 37.878 44.191 50.504 56.817 63.13
m 9.864 19.728 29.592 39.456 49.32 59.184 69.048 78.912 88.776 98.64
m* 15.413 30.826 46.239 61.652 77.065 92.478 107.891 123.304 138.717 154.13
ize Number of Bars (millimetres) *Denotes non-preferred sizes
75 100 125 150 175 200 225 250 275 300
m* 2.960 2.220 1.776 1.480 1.269 1.110 0.987 0.888 0.807 0.740
m 5.267 3.950 3.160 2.633 2.257 1.975 1.756 1.580 1.436 1.317
m 8.213 6.160 4.928 4.107 3.520 3.080 2.738 2.464 2.240 2.053
m 11.840 8.880 7.104 5.920 5.074 4.440 3.947 3.552 3.229 2.960
m 21.050 15.790 12.630 10.530 9.023 7.895 7.018 6.316 5.742 5.262
m 32.880 24.660 19.730 16.440 14.090 12.331 10.960 9.864 8.967 8.220
m 51.390 38.540 30.830 25.690 22.020 19.270 17.128 15.420 14.015 12.850
m - 63.130 50.500 42.090 36.070 31.570 28.058 25.250 22.956 21.040
m - - 78.910 65.760 56.370 49.320 43.840 39.460 35.869 32.880
m* - - - 102.750 88.070 77.060 68.502 61.650 56.047 51.380
ize Number of Bars *Denotes non-preferred sizes
1 2 3 4 5 6 7 8 9 10
m 28.3 56.5 84.8 113 141 170 198 226 255 283
m 50.3 100 151 201 251 302 352 402 452 503
m 78.5 157 236 314 339 471 550 628 707 785
m 113.1 226 339 452 566 679 792 905 1718 1131
m 201.1 402 603 804 1005 1206 1407 1608 1810 2011
m 314.2 628 942 1257 1571 1885 2199 2513 2827 3142
m 490.9 982 1473 1963 2454 2945 3436 3927 4418 4909
m 804.2 1608 2413 3217 4021 4825 5630 6434 7238 8042
m 1257.0 2513 3770 5026 6283 7540 8790 10053 11310 12566
m* 1963.5 3927 5890 7854 9812 11781 13744 15708 17671 19635
Standard Sizes (4800mm x 2400mm)
BSReference
Mesh SizeNominal Pitchof Wires
WireSizes
Cross SectionalArea perMetre Width
NominalWeight perM2 Sheets
per tonne(approx)
SheetWeight(kg
Sheets perBundle
SquareMetres pertonneMain Cross Main Cross Main Cross (Kg)
Square
A 393 200mm 200mm 10mm 10mm 393mm2 393mm2 6.16 15 70.96 18 162.34
A 252 200mm 200mm 8mm 8mm 252mm2 252mm2 3.95 22 45.50 28 253.16
A 193 200mm 200mm 7mm 7mm 193mm2 193mm2 3.02 29 34.79 34 331.13
A 142 200mm 200mm 6mm 6mm 142mm2 142mm2 2.22 40 25.57 46 450.45
Structural
B 1131 100mm 200mm 12mm 8mm 1131mm2 252mm2 10.90 8 125.57 10 91.74
B 785 100mm 200mm 10mm 8mm 785mm2 252mm2 8.14 11 93.57 14 122.85
B 503 100mm 200mm 8mm 8mm 503mm2 252mm2 5.93 15 68.31 18 168.63
B 385 100mm 200mm 7mm 7mm 385mm2 193mm2 4.53 20 52.19 24 220.75
B 283 100mm 200mm 6mm 7mm 283mm2 193mm2 3.73 24 42.97 30 268.10
Long
C 785 100mm 400mm 10mm 6mm 785mm2 70.8mm2 6.72 13 77.41 16 148.81
C 503 100mm 400mm 8mm 5mm 503mm2 49.0mm2 4.34 20 50.00 26 230.41
C 385 100mm 400mm 7mm 5mm 385mm2 49.0mm2 3.41 26 39.28 30 293.26
C 283 100mm 400mm 6mm 5mm 283mm2 49.0mm2 2.61 34 30.07 32 383.14
Wrapping
D49 100mm 100mm 2.5mm 2.5mm 49.1mm2 49.1mm2 0.77 129 7.76 50 1298.70
Flying End Fabric
To BS 4483 Type 2 wire profilein both A & B Types
Particularly beneficial:
Where standard fabric is specified as a structural reinforcement
In thin topping slabs on permanent metal & precast decking
Availlable in Types:
A Range B Range
A393 B1131
A252 B785
A193 B503
A142 B385
All with splices to enableminimum lapping40 x bar dia.
Even when staggering laps, you cannot avoidat least a 3 layer build up.
No congestion, even where 4 sheets meet.
Flying End Fabric Nested Lap
Standard Fabric Congestion at Laps 8
4
Dont compromise on coverFabric without the overlap congestion 4
Also available in a T12 on T12 format
Our Role in the Piling Market
ROMTECH is the UKs premier supplier of pile reinforcement.
This includes:
Factory manufactured pile cages to BS 7123
Cage Former Systems for the rapid, accurate site steelfixing optionto UK CARES Technical Approval Document TA5/5010 : 2005
Loose rebar, rings and helical to BS 4449:2005
LOLER Compliant offload / stillage system to avoidworking at height on the trailer deck.
Safe Splice Safety orientated Pile Cage fasteningsystem for the Rotary Piling Technique
All factory prefabricated pile cages conform to UK CARES AssessmentSchedule 10 by which we mean that we design the fillet welds between bandsand cage rebars to give an acceptable factor of safety for cage lif ting andinstallation. We inspect finished cages in order to ensure cage complianceagainst this temporary works design.
All factory tackwelds comply with UK CARES Assessment Schedule 6ensuring against rebar embrittlement so reducing site liability during piletrimming.
ROMTECH produces CAD drawings of rebar cages prior to contractsstarting. This enables prior approval of the actual cage to be used, as well as
being a works instruction, a site inspection instruction and finally an as-builtrecord of the steel components within the pile.
We at ROMTECH are used to working between the late arrival of designinformation and the unremitting deadline of imminent c age delivery.
Whichever ROMTECH product option is selected, our aims are to ensureproduct compliance with the latest Health and Safety Legislation, high siteproductivity and freedom fr om metallurgical defects; the whole packagepresenting itself as a cost-effective solution.
Should future sites demand solutions which are beyond the scope of ourexisting product lines, then we would work with site to either modify theseor develop fresh solutions. We regularly attend sites and carry out toolboxtalks to personnel and compile Method Statements in order to ensure correctproduct usage.
Finally, ROMTECH is well-versed and experienced at operating within such ademanding environment. We offer one-stop shopping for all your existing pilereinforcement needs along with a unique service to develop new product linesand so meet the challenges of the future.
Steve Render BSc (Eng) MSc CEng MICETechnical Director
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Accurate, rapid assembly
Lifting bands and fillet welds for robustness in transport and safe site lifting
Integral, non-detachable skid spacers to positively centre the cages and ensure cover
For Pile Trimming, debonding isofoam and integral splitter tube can be supplied on the cages
Cage detail drawing available on request
Cage factor of safety lifting calculation available on request
Offsite, pre fabrication eliminates cage price inflation due to sub-contract steelfixer claims
No site steelfixer means less cranaege and significantly reduced supervision and liability on site Health and Safety
ROMTECH requires four working days notice from call-off to site delivery for cages of this type
Manufacture of Market-typical Cages
Manufacture of Larger Cages
PilingFactory Prefabricated Pile Cages
One-Piece and Conventionally-Spliced Cages
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Mechanically Spliced Cages
Close positional control of all longitudinal and
circumferential cage components through use of machine
ensures excellent quality
Lifting bands and welds designed to resist lifting stresses.
All such welds to UK CARES Appendix 10 and BS 7123
Range of helical wrap from H06 to twin H16 at any pitch
Minimum five working days notice from call off to delivery
Loads scientifically packed and strapped for optimal
load preservation
Consignment ready for immediate installation inside the pile
bore on arrival
Just in time delivery for cases of zero site storage
Full cage manufacturing drawings available for approval
prior to build, for site inspection and site as-built records
Lifting F/O/S calculations available on request
Quality controlled tight tolerance band and blue-printing in
manufacture permits ease of subsequent site splicing
Erico-Lenton calibrated torque wrenches supplied to site
Integral spacers, and debonding isofoam available
Works templating of integral sonic or inclinometer pipes for
rapid, accurate site connections
PilingFactory Prefabricated Pile Cages
Cage in Manufacture
Cages Stacked on Transport
Cage Splicing On Site
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In-house detailing and scheduling along with dedicated component quality inspection for highly accurate specification.
Couplers attached and torqued to one end of each cage section in the works
Integral, heavy duty, large footprint skid spacers attached in factory for preservation of side cover
Short, Mechanically-Spliced, Coupled PileCages for Low Head Room Piling Applications
Quality controlled tight tolerance band and blue-printing in
manufacture permits ease of subsequent site splicing
Erico-Lenton calibrated torque wrenches supplied to site
Integral spacers, for pile trimming, debonding isofoamavailable
Works templating of integral sonic or inclinometer pipes for
rapid accurate site connections
Splicing Upper and Lower Cages Using Torque Wrench
Cages Stacked On-Site Prior to Piling
PilingFactory Prefabricated Pile Cages
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Safety-Oriented Pile-CageFastening System
Piling Health and SafetySafe Splice System
Simple, Rapid installation using mechanical wrench
Operators hands kept clear of cage through socket extension
ROMTECH design service integral with cage supply
Pile cage fittings factory welded to BS 7123 in compliance with UK CARES Certificate no. 871001
Bolt Range and corresponding test strength availability is :-
ROMTECH recently supplied a large diameter piling contract which used conventionally spliced pile cages. The use of
Bulldog grips was prohibited because of the hazards of manually fitting them with operators hands passing inside both the
trapped-off and suspended pile cages. Safe-Splice is a patented system which we have developed as a much safer
alternative to U-bolts.
*Based on Grade 8.8 steel
Bolt Size [mm]* M16 M20 M24 M27 M30
Proof Test Strength Per Bolt [kN] 60 80 100 130 170
SWL per Bolt [kN] 20 25 33 43 56
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ROMTECH can detail composite rebar or threadbar cages containing a central bar for factory prefabrication to ensure
LOLER Compliant cage splicing over the casing
Patented sequential splicing system allows initial connection of central bars without compromising the subsequent splicing
of outer cage bars
Proprietary rebar or threadbar coupler options available
Demountable central bar support system eases cage/bar splicing by allowing longitudinal relative movement between cage
and central bar
Anti-FlotationTension Mini-Piles
Mechanically spliced version
Threaded bars awaiting sequential installation Threaded rebar cages with integral central bars
awaiting installation
Lowest cage being threaded onto highest central bar Cage to cage connection being made, includingcentral bar splice
PilingComposite Tension Pile Cages
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PilingRenewable Energy
Pipe Installation Formers Rotary Piling Option
Renewable Energy Geothermal Pile Cages
Cage manufacture CFA Option
Pile cages detailed for economy with maximum rigidity in order to support the pipework through the stress of forced installation
Pipework available in metal or plastic with high pressure-rated connections
Mechanical pipe-to-bar connectors to avoid detachment and buoyancy of pipework
Rigid sheathing of u-bends for pipe protection and concrete flow through cage during installation
Cage / pipe assembly being
lifted prior to installation
Cage installation demonstrating
anti-buoyancy and robustness of
pipe fittings
Rigid former body allows gripping of flexible plastic pipes in
spaced apart formation either by wire tying or clamps
Effective bundling permits ease of pipe installation from the
horizontal over the edge of the casing
Rigid spacers can be of any cover dimension and will centralise
the pipe bundle effectively
Cage almost down to depth
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PilingPiling Cage Accessories
ROMTECH ThreadbarCages & Accessories
Components Site assembly of Anchor Pile Cages
ROMTECH Threadbar is available in the following grades:-
RT550 = 500/550 grade
RT800 = 670/800 grade
RT1050 = 900/1050 grade
-
-
-
Individual stock or cut to length
threadbar and nuts, bearing plates
and couplers
Non welded lifting eye for
RT1050 grade bars
Site based test pile set up showing
RT1050 ties to anchor piles
All coupler, nut and bearing plate accessories available
Factory sawn-to-length bar service availability = 2 days
Transport charge negated if called-off with ROMTECH Cages
Factory PrefabricatedAnchor Pile cages
RT1050 grade circular cage using
patented, non-welded clamped cage formers
ROMTECH factory-prefab
anchor pile cages overcomesite welding issues on high
strength threadbar and
ensure accuracy of fit with
testing rig
Factory assembly through
CARES approved welding for
RT550 and RT800 and cage
formers for the non-weldable
RT1050
Cage lifting points built in
Robustness avoids transport
damage and ease of
installation
RT1050 grade rectangular cage using template
bracing and u-bolts
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Renewable Energy Wind Turbines
Completed Structure
Deep, slender tension piles in this application benefit
from the congestion relief within the pile cage of high
strength threadbar
ROMTECH factory welded threadbar (RT550 and RT800
grades) and rebar cage options available
Threadbar size range from 15mm 75mm
ROMTECH patented clamped cage formers for factory or
site assembly of non-weldable threadbar cages (RT1050)
Fewer cage joints make for economies in cage fabrication
Rebar option also available
PilingRenewable Energy
Finished Piling
ROMTECH cage-head fittings facilitate effective pile
trimming and promote the easy connection between pilesand pile cap
ROMTECH pile cage technology for the most effective
cage assembly solution
Cage lifting made scientifically safe through ROMTECHexpertise on placement of lifting points
Factor of safety calculations available based on proven
test results
Rebar replacement option using threadbar to avoid
congestion and provide greatly enhanced tensile strength
Cage Lifting and Installation
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Piling Health and SafetySafe Site Offloading
LOLER-Compliant BulkOffloading System
Heavy duty Version
Light Duty Version
The systems are currently used successfully for factory prefab pile, beam and column cages as well as bundled stock rebar
We would recommend the system for use with:
Structural Steelwork Sections
Scaffold Tubes and Battens
Precast Concrete Elements, including Precast Driven Piles
Bundles of Mesh
CFA Auger Sections
All frames are proof tested, stamped and cer tified by an independent LOLER- registered lif ting specialist as well as being
the subject of a patent application
The cradle system can be supplied in the customers corporate colours
This is a cradle based system which avoids the need to work at height while offloading elongated bulk prefabricatedproduct on site.
-
-
-
-
-
Heavy System = 24.0 tonnes SWLand crane offload
Cradle lifting points which are at shoulder height can be connected to offloading appliance by operator who is alongside
trailer. There is no need for him to climb onto the trailer deck
The cradles safely contain the load during the lift and act as a structural stillage, keeping the product stack safe and clean
Individual product can then be safely lifted out of the cradle
Light System = 1.0 tonne to 4.0 tonne SWL
with back-acter, HIAB or telehander offload
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Pile Cage AssemblyDrawings
CUSTOMER:
DRAWN BY: A CORBETT DRAWING No: 01003891c
DATE: 03/07/03
CONTRACT: WEMBLEY STADIUM
Dwg. TITLE: DETAIL OF 28T40 x 1350mm O/D x 14.0m
PREFAB CAGE - TS1-C Top
PILING REINFORCEMENTWatling Street Business Park
Watling Street A5, Norton Canes,Near Cannock, Staffs. WS11 3XG
Tel: 01543 364300 Fax: 01543 364321
CHECKED:
Reinforcement to B.S.4449 :1997. & B.S.4482 : 1985.
Bending and cutting of reinforcement to B.S.4466 : 1989 & B.S.8666 :2000.
All rebar is factory welded to B.S.7123 : 1989 as certified by UKCARES scheme No.871001
First and Last links to have all bars welded. Other links to have a minimum of 4 No barswelded.
Where spacers are supplied loose, they are to be welded to all bars in 4-bar cages /
alternate bars in 8-bar cages, at least.
Spacer groups centres should not exceed 3 metres.
For piles with horizontal loads, cages should be designed by an engineer.Top & Bottom Ring - Minimum 2.1 Turns
REVISION: a Helical extended to top of cage
BS EN ISO 9002
APPROVED:
DATE: 04/07/03 - NAME: A CORBETT
PRODUCTCERTIFICATION
002
U K A S
b Updated for Manufacture
09/07/03 - NAME: A CORBETT
c Sonic Tubing Added to Cages
11/07/03 - NAME: A CORBETT
d
- NAME:
28T40 Bars (01)
13,80070No. Turns T16 Helical @ 200mm C/C (02) (PAIRED)
14,000 Overall
A
A
100
1,3
50O/D
Band Welder - Name / Signature
Cast No - Helix / Rings
Cast No - Bar
PLEASE NOTE:
1 - 30 Cages: Please check first, middle and last cage
30 - 100 Cages: Please check first, last and random 2
100+ Cages: Please check every 50 Cages
PRODUCT CODE: P2887xxx E972
Requisition - xxx
QUANTITY: 1 No
DELIVERY: xxxx
SPECIAL INSTRUCTIONS
MACHINE WRAPPED
100 2,000 2,000 2,000 2,000 2,000
Welded Band
Lifting Points
7No 75 x 20 MS Welded
Bands (03) (1238mm O/D)
3No. T12 Spacer Groups
(75mm Cover)
1No. T10 Round Spacer
Group (75mm Cover)
Section 'A' -'A'
Welded Band
Lifting Points
2No. Lifting Points
Per Welded Band
4No. Sonic Tube
Stirrups to suit
60.3mm O/D Tubing
PLEASE ENSURE THAT ALL SONIC TUBE STIRRUPS LINE UP.
2,000
1No. T12 Ringx 3.1 Turns to be
Tack Welded Internally and
Removed once cage is wrapped
100
1,900
6,500
STS1
SS1
6,500
SS2 SS1 SS1W W W
PilingTechnical Support
ROMTECHs AutoCad Detailing Facility Routinely:
Defines the exact cage format by producing a working drawing using customer contract documents. This usually takes place a
few days prior to delivery of the relevant cage type and enables all parties to progress forward from the original contract rebar
drawing/schedule stage.
The drawing will cover the scheduled main and transverse reinforcing bars and cage dimensions but can also include lifting
points, skid spacer locations, debonding isofoam, sonic coring/inclinometer pipes and couplers. Where clamped cage
formers are used, the drawing will state the recommended torque setting.
ROMTECH Drawing Service Typical Examples
Factory Machine Welded Pile Cages (Conventional Splice)ROMTECH:
works with the customer to obtain
Clients approval of the ROMTECH
drawing
issues the pile cage drawings along
with any necessary component
drawings to ROMTECHs Works for
cage manufacture
issues the cage drawing for factory
welded cages to site for inspection of
delivered consignments, for ongoingreference and for submission to the Client
offers a revision service for drawingupdates
maintains a long term database
for completed drawings for use bycustomers and their Clients for the
purpose of as-built records
issues the cage drawing for site-assembled cages to site for the
steelfixing and site inspection of
completed cages
6,000 Overall
500 5,25021No. T10 Rings @ 250mm C/C (02)
200
200
O/D
6T16 (01)
2No. T10 Rings (03)
2.1 Turns - Welded
Band
2No. T10 Spacers
Groups (75mm Cover)
50
- NAME:
b
- NAME:
c
- NAME:
d
- NAME:
PLEASE NOTE:
1 - 30 Cages: Please check first, middle and last cage
30 - 100 Cages: Please check first, last and random 2
100+ Cages: Please check every 50 Cages
TOP OF CAGE (ALL BARS TO BE LEVEL)* WEIGHT OF CAGES = 0.068 TONNES* FACTOR OF SAFETY FOR LIFTING = 49.65 ALL BANDS TO BE WELDED TO BOTHSIDES OF ALL REBAR
CAGE LIFTING POINTS SHOWN THUS -
Cast No - Bar
Cast No - Helix / Rings
Band Welder - Name / Signature
CUSTOMER:
DRAWNBY: A CORBETT DRAWING No: 01004285
DATE: 02/09/03
CONTRACT: WEST END CAR PARK
Dwg. TITLE: DETAIL OF 6T16 x 6m x 200mm O/D
PREFAB CAGE PILING REINFORCEMENTWatlingStreet Business Park
WatlingStreet A5, NortonCanes,NearCannock, Staffs. WS113XG
Tel: 01543364300 Fax: 01543364321
CHECKED:
Reinforcement toB.S.4449:1997. & B.S.4482:1985.
Bendingandcutting of reinforcement toB.S.4466: 1989& B.S.8666:2000.Allrebaris factory welded toB.S.7123: 1989 as certifiedby UKCARES schemeNo.
871001
First andLast links tohave allbars welded. Otherlinks tohavea minimumof 4 Nobarswelded.
Wherespacers aresuppliedloose, they areto beweldedto allbars in4-barcages /
alternatebars in8-bar cages, at least.
Spacergroups centres shouldnot exceed3metres.
Forpiles withhorizontalloads, cages shouldbe designedby anengineer.
Top& BottomRing- Minimum2.1Turns
REVISION: a
BS EN ISO 9002
SPECIAL INSTRUCTIONS
TRESTLE MANUFACTURE
PRODUCT CODE: P2888251 H625
QUANTITY: 114 No
DELIVERY: Monday 8th September
APPROVED:
DATE:
Factory Trestle Welded Pile
Cages (One cage per pile)
10 No. T10 Spacer Groups
x 75mm Cover
PLEASE NOTE:BOTTOM OF BARS ON TOP CAGE, AN D TOP OF BARS ON BOTTOMCAGE TO BE PAINTED YELLOW.
LIFTING POINTS TO BE PAINTED RED ON THE INSIDE OF THE TOPBAND.
Iso Foam to
Each Bar (2225mm
Length)
27,900 Overall
2,925
13,950
10,800
37No. T16 Rings @ 300mm C/C
1,700 12,300
42No. T16 Rings @ 300mm C/C
175
13,950
8T50 (03)
8T50 (04)
8T40 (01)
8T40 (02)
5 No. T16 Loose
Rings Not Welded
See drg. 01001816a
3No. T16 Rings
as Stent drg. No.MM0009/SB/015
2,100
2 ,1 00 2 ,1 00 500
500 2,300 2,300 2,300 2,300 2,300 1,650
13,950 13,650
P13.5 Couplers
6No. 75 x 20 MS Welded Bands
1813mm O/D
2,825 2,100 2,225
6No. 75 x 20 MS Welded Bands
1803mm O/D
Band Welder - Name / Signature
Cast No - Helix / Rings
Cast No - Bar
TOP OF CAGE (ALL BARS TO BE LEVEL) ALL BANDS TO BE WELDED TO BOTHSIDES OF ALL REBARALL BARS PART THREADED TO RECEIVE LENTONP13.5 COUPLER OR SIMILAR APPROVED
PLEASE NOTE:
1 - 30 Cages: Please check first, middle and last cage
30 - 100 Cages: Please check first, last and random 2
100+ Cages: Please check every 50 Cages
- NAME:
d
- NAME:
c
13/05/03 - NAME: A CORBETT
b Foam Length Updated
12/05/03 - NAME: A CORBETTDATE:
APPROVED:
PRODUCT CODE: P288XXXX E282
QUANTITY: 1 No
1st DELIVERY DATE:
SPECIAL INSTRUCTIONS
BS EN ISO 9002
a Cage Updated for Sacrificial CageREVISION:
Reinforcement to B.S.4449 :1997. & B.S.4482 :1985.
Bending and cutting of r einforcement to B.S.4466 : 1989 & B.S.8666 :2000.
All rebar is factory welded to B.S.7123 : 1989 as certified by UKCARES scheme No.871001
First and Last links to have all bars welded. Other links to have a minimum of 4 No bars
welded.Where spacers are supplied loose, they are to be welded to all bars in 4-bar cages /
alternate bars in 8-bar cages, at least.
Spacer groups centres should not exceed 3 metres.
For piles with horizontal loads, cages should be designed by an engineer.Top & Bottom Ring - Minimum 2.1 Turns
CHECKED:
Tel: 01543 364300 Fax: 01543 364321
Watling Street A5, Norton Canes,Near Cannock, Staffs. WS11 3XG
Watling Street Business ParkPILING REINFORCEMENT
Dwg. TITLE: DETAIL OF 16T50/40 x 27.9m x 1935mm
O/D PREFAB CAGE TYPE BA(2)
CONTRACT: KINGS CROSS TICKET HALL
DATE: 17/04/03
DRAWING No: 01003301bDRAWN BY: A CORBETT
CUSTOMER:
1No. 75 x 20 MS Welded Band
1943mm O/D
30018
16
6
16
Qty
54mm Isofoam x 2000mm Long
75x20 MS Band x 1813mm O/D
50mm - 40mm Lenton Coupler
75x20 MS Band x 1803mm O/D
T16 x 1935mm O/D Rings
T40 Bars @ 13650mm
T50 Bars @ 13950mm
Description
Materials List
6
87
8
T40 Bars @ 13950mm 8
75x20 MS Band x 1943mm O/D 1
LENTON COUPLERS SHOWN BOXEDTHUS -
CAGE LIFTING POINTS SHOWNTHUS -
Factory Machine Welded
Pile Cages (Coupled)
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Loose Cage Componentsfor Site Steelfixing
PilingPile Cage Site-Assembly Packages
Full overlap and structural welded
lap types
Exceptional accuracy for zero
complaints from steelfixers
Wire to BS 4482 in 6mm to 16mm
sizesBS 4449 material in size range
6mm to 25mm
No tails to infringe cover zone
O/D range 100mm to 3000mm
Wire to BS 4482 in sizes 6mm to 16mm
O/D range 100mm to 2000mm
For correct specification see attached
Helical chart
Closed format or pre-pitched.
Permits rapid, accurate cage assembly
Stiffens cage and provides lifting points
for scientifically safe lift operations
Streamlines cage for CFA installation
Non-detachable, rigid integral spacers
to BS 7973:2001Eliminates the need for site weldingand its liabilities
Overlap Rings Cage FormersHelicals
20kg Catch-weight coils
16 S.W.G. Black-annealed material
Exceptional pliability for zero
steelfixer complaints
Deoxidised-coated to avoid agehardening
Tie-Wire
Factory butt-welded strip for
continuous helical construction
Wide dimensional range to suit all
cage types
Mild Steel or High Tensile materialoption
Lifting Bands
Stock lengths to BS 4449
Special Stock lengths up to 18.0m
Cut-to-length bars
Cut-and-bent bars
Erico Lenton Male Taper-threaded bars
Rebar to BS 4449
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Cage O/D R6 H6 R8 H8 R10 H10 R12 H12 H16
100 RINGS RINGS 150 RINGS RINGS RINGS
200 RINGS RINGS RINGS
250 RINGS RINGS RINGS
300 RINGS RINGS RINGS
350 RINGS RINGS RINGS
400 RINGS RINGS
450 RINGS RINGS500 RINGS550
RINGS
600 RINGS650 RINGS700 RINGS750 RINGS800 RINGS850 RINGS900 RINGS950 RINGS1000 RINGS1050 RINGS
PilingHelicals Chart
Notes
Table is for guidance only.
Key: Not Possible Helicals Not Recommended
Helicals
ROMTECH can make helicals from R6 to H12 for cage O/D up to 1050mm and in
H16 for larger cage O/Ds as indicated by:
ROMTECH can make helicals of O/D ranging from 100mm to 2000mm.
The range shown can be pulled out to pitch on site.
Helicals can be made to pitch for smaller O/D but rings should preferably be specified.Where helicals are made to pitch, steelfixers recommend that the overall axial length should not exceed 1.5m 2.0m.
Helicals made to pitch will incur an extra charge per tonne production cost over ROMTECHs normal selling price.
It should be noted that helicals made to pitch are extremely bulky and are likely to incur extra carriage costs.
Rings
Rings should be specified for smaller O/Ds rather than helicals. ROMTECH can make rings in bar sizes 6mm to 25mm.
ROMTECH can make rings in O/D size from 100mm to 3000mm.
Rings can be made overlapped or welded.
When ordering overlapped rings, the lap is generally defined as 40 x dia. of the bar specified.
Welded rings will generally have a lap of 50mm unless specified otherwise. Note: lap may need a structural weld.
When ordering closed pitch helicals, please state the wire size, finished O/D, Number of turns & pitch of helical when pulled open.
ROMTECH will calculate the O/D size of helical to allow for shrinkage, to finish up with your final O/D when pulled out to pitch.
1.
2.
1.
2.
3.
4.5.
6.
7.
1.
2.
3.
4.
5.
Recommended No. of Turns Per Helical
Diameter Max No. Of Turns
6mm 40
8mm 35
10mm 30
12mm 20
16mm 10
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Simple Wire-Tied Version of theCage Former System
Any cover dimension available on factory pre-set, rigid,
integral spacers. These are non-detachable to ensure
side cover
Cage Formers transform both rapidity and accuracy of
Steelfixing
Main bars locked in correct Circumferential locations when
tied-off to rings and adjacent to welded spacers
Factory welded Construction Imparts Stiffness to finished
cage for safety-assured cage lift.
Streamlined spacers and robustness of cage permits ease
of installation even under cage vibration as in the case of
CFA technique
Large footprint spacer ensures correct cage centralisation
and concrete cover compliance
Safe means of bolting a central bar (or bars) into a top
cage for simultaneous installation into same pile bore and
avoidance of telescoping as in DCIS work
Single lift/installation avoids the need to install cage and bar
separately along with the time penalties and risks of cage-refusal (CFA technique) that this entails
Certified Test Strengths and Factor-of-Safety calculations for
cage lift, so ensuring high degree of safety for composite cage
Centralisation of single bar within pile bore
Located Rebar options = H12 to H50.
Pile size options = 150mm to 1200mm.
Quantity of spacer legs = 3No to 12No dependent on barweight and pile size
All cover dimensions available
Multiple bar capability available
Attachment by tie-wire or grub-screw
PilingFactory-Built Pile Cage Components for
On-Site Assembly
Lantern Spacers
Cage/Bar Splice Units
Light Duty Cage Formers
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Clamped Cage Former Systemfor Site-Assembly
This system is a scientifically safe means of site assembling pile cages where an alternative to traditional site welding
is required. (certified to UK CARES technical approval document TA5/5010:2005)
Cage formers contain rebar locator stubs to ensure highly accurate circumferential settings to main cage bars
Twin-ring construction gives rigid box-like nature to cage formers ensuring robustness of finished pile cage
Integral mechanical clamps, when torqued at 80Nm, provide scientific cage lifting points (typical single clamp test strength= 120kN) giving high factors of safety during suspension of cage
Built-in anti-racking supports permit cage stability during site lifting operation
Rigid, integral cover spacers supplied to any cover dimension reduce workload of piling crew
Five grades of spacer footprint available according to cage weight and piling application
All ROMTECH skid spacers comply with the heavy-duty structural test requirements of BS 7973:2001
Template-like nature of formers allow rapid, highly accurate cage steelfixing operation
Clamp test strengths available on request
Economic cogency of cage former solution enhanced by supplementary locator rings and ladder spacers
Specified by Railink Engineering on all CTRL projects from early 2001
Cage fabrication drawings produced automatically to assist site steelfixing. Cage lifting calculations and method statements
available on request.
Heavy-Duty Cage Formers
PilingFactory-Built Pile Cage Componentsfor On-Site Assembly
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Pre-Assembled Ladder Spacers
PilingFactory-Built Pile Cage Components for
On-Site Assembly
Rigid assembly with very large spacer footprints for
low contact pressure so maintaining concrete cover
dimension.
Centralises heavy pile cages.
Easily attached to completed pile cages.
Any cover dimension available at shor t notice.
Developed for/Specified on all CTRL projects.
Design service available.
Three sizes of very large spacer-footprints for
centralising very heavy diaphragm wall panel and
ensuring correct concrete cover.
Product rapidly applied to completed rebar panels on
site using tie wire.Spacers are available in five grades of footprint size.
All ROMTECH skid spacers comply with the heavy-duty
structural test requirements of BS 7973:2001
Heavy-Duty Radiussed Ladder Spacer
Heavy-Duty Flat Ladder Spacers
Light to Medium-Duty Wraparound Ladder
Fulfils the radiussed ladder function for cage weights
up to 1.5 tonnes.
Spacers streamlined to suit cage installation in CFA piles.
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Pile-Trimming Accessories
PilingPile Cage Accessories
High yield or mild steel lifting eye fabricated to suit yourpile diameter/ cut-off level.
Bar sizes H12 to H25 available.
Non-drill option available through version with integralsplitter tube.
Factor of Safety Calculations for lifting of pile head
available.
Detail drawings available.
Full tube size-range available for all rebar and sonic coring tube sizes.
Standard stock lengths of 2.0m available.
Only low water-absorptive foam material used.
Can be supplied loose or attached to prefab cages manufactured
by ROMTECH.
Satisfies established minimum 9mm wall thickness requirement.
Cable ties and fixing tape also available.
Rebar cage detail drawing available.
Grade EPS 70 expanded Polystyrene Composite Tips for easyextraction of material (if encast beneath cut off level).
EPS70 Composite tips
Fabricated Lifting Eyes for head extraction
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Additional Pile-HeadReinforcement Units
Supports additional bearing, bursting and shear stresses which can arise as a function of testing the pile head
Prefab cap unit allows ease of site installation
Internal/external helical wire size range from 6mm to 20mm in order to resist required magnitude of bi-axial tension
Jig-built construction for highly accurate dimensions
Prevents un-cured flared head spalling when trafficked
Provides enhanced corbel strength to flared head in its connection with overlaying structure. Available in five different wire
diameters for this purpose and to suit different loading conditions
Head unit configuration either as pure head reinforcement or to fulfil this function plus additionally reinforcing pile-shaft
below. Heavier versions can both reinforce the flared head and replace the pile cage altogether
Optional integral cover spacers to splayed sides for easy attainment of correct concrete cover
Flared Head Reinforcement Units
Helical (Anti-Bursting) Test Pile Cap
PilingPile Cage Accessories
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Effective Temporary-WorksSupport of Cage Within Pile Bore
PilingPiling Accessories
Mobilises soil bearing capacity to provide massive toe-support to heavy pile cages during installation
Prevents cage dropping during installation or casing-extraction so avoiding the liabilities of low cages and the unscheduled
need for expensive repair couplers
Simple, scientific, torque-controlled integral clamps are rapid and easy to work with, so avoiding the need to site-weld the
feet to the cage whilst making the feet secure
Use of integral clamp allows feet to be detached from previously fitted-out cages in order to telescope the foot to alter itsprojection below the cage to allow for changing toe bearing
Projection of cage foot through bottom-end concrete of pile has been deemed acceptably durable on CTRL projects,Terminal 5 Heathrow and other prestigious contracts due to the anaerobic nature of the environment at the base of the pile
Design service available
Heavy Duty, Clamped-on Cage Feet
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ROM ShearLadder System
PilingPiling Accessories
For the easy, scientifically
safe installation of single rebar
centrally within the pile bore
Rebar size range
= 16mm to 50mm
Threadbar size range
= 15mm to 75mm
LOLER compliance throughtesting/certification by
independent lifting specialist
Recommended torque wrenchsetting = 80Nm
DCIS/Rotary version releasableremotely within pile casing once
rebar is down to depth
Method statement availableon request
Looks like a cage former except
that the rings squeeze down to
clamp onto either the four arises
of the plunge column or thewhole of the permanent liner
Clamping action provided by
double-strand tying wire forlight applications and grade
8.8 bolts for heavier versions
Avoids material damage andsite liability by eliminating site
welding
Rigid Integral skid spacers to
the structural requirements of
BS 7973 are available in five
footprint sizes and any cover
dimension
Positive centralization of
enclosed item with the pile bore
Detail Design Service available
CFA Reusable Shackle DCIS/Rotary Remote Rebar Shackle
Plunge Column Spacer unit Permanent Liner Spacer unit
Special Spacers andLifting Shackles
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PilingPiling Accessories
ROM ShearLadder SystemPile CasingSafety Covers
Low weight, factory-welded mesh construction gives adequate
protection to operators during hours of site operation
Dished profile prevents dislodgement off the casing and
permits stacking for ease of transport and storage
Heavy welded rebar construction permits site trafficking
during working hours. This means that the product cannot
be dislodged by a manual lift, so making it suitable for
casing protection during hours of site closure
Cover has integral lifting points to allow the safe use ofcranaege in off-loading and deployment
Design and detailing service available for determination of
mesh size and bar diameter to suit imposed loading, for
depth of perimeter welded band and strength/quantity of
lifting points
Mat covers completed pile bore to prevent hidden trip hazard
Rigid welded construction easily supports a persons weight
Flush fitting of mesh grillage to outer link avoids sharp
points and edges
Optional Hi-Viz corner flashes
Low weight of mat permits ease of lifting and transport
Three mats sizes cover pile bore diameter range of 300mm
to 1200mm
Heavy Duty Version
CFA Pile Bore Mats
Light Duty Version
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ROMTECHPrefabrication Service
ROMTECH offers a complete offsite reinforcement prefabrication service which
produces finished cage or mat assemblies delivered, ready for placing in positionon site.
The prefabricated units are detailed by ROMTECH in conjunction with the customer
to ensure compatibility on site. Assemblies can be Mig welded, clamped or wire
tied with additional reinforcement if required to ensure that the integrity of the
assembly is maintained during transportation and placing on site.
Quality AssuranceAll ROMTECH prefabrication facilities, materia ls and welders are fully CARES
approved. Our facilities, materials and operatives are independantly audited on a
regular basis to ensure the correct procedures are complied with.
Key BenefitsRemoves steel fixing from the critical path
Continuity of manufacture regardless
of weather conditions
Costly site fixing becomes cost effective
placing of prefabricated units
Improved safety from reductionsin movement of loose bar
Assemblies supplied with labels andlocation plan for ease of identification
Typical Items from ROMTECHGround beams, pile caps, piles, diaphragm wall cages, columns, capping beams,
heavy diameter one way / two way mats etc.
ROMTECH would welcome the opportunity to discuss your requirements.
ReinforcementPrefabrication
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Product Line
The most widely used mechanical splicing system in the world. With experience of over 30 years, LENTON products providea complete line of full tension and compression mechanical splices. LENTON couplers are the slimmest couplers on the
market for tension and compression.
For a full range of couplers contact your depot on Tel: 0870 011 3610 or Fax: 0870 011 4568
Couplers - A12
LENTON standard couplers are
designed to splice the the same diameterbars where one bar can be rotated and is
not restricted in its axial direction.Product Code To suit bar Diameter
12 A12 12mm
16 A12 16mm
20 A12 20mm
25 A12 25mm
32 A12 32mm
40 A12 40mm
50 A12 50mm
Standard Couplers -A12
Transition couplers are designed to
splice different diameter bars whereone bar can be rotated and is not
restricted in its axial direction.
Transition Couplers - R11
To suit bar Diameter Pack Size
12/16mm 1
16/20mm 1
20/25mm 1
25/32mm 1
32/40mm 1
40/50mm 1
TransitionCouplers - R11
Product CodeTo suit
bar Diameter Pack Size
25 P13.5 25mm 1
32 P13.5 32mm 1
40 P13.5 40mm 1
50 P13.5 50mm 1
Position Couplers - P13.35 The Positional style coupler P13.35can be used when neither bar can be
rotated and when the ongoing baris free to move in its axial direction.
If the ongoing bar is restricted in its axial direction then a P13 type coupler
is required. Contact your nearest ROMTECH depot for detailed information.
Positoin
Couplers - P13.35
Reinforcement ConnectionLenton Couplers
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The benefits of using reinforcing bar couplers to accelerate the speed of construction, increase productivity and simplify the design
of reinforced concrete are widely recognised. The Ancon range includes tapered, threaded and mechanically bolted couplers.
For a full range of couplers contact your depot on Tel: 0870 011 3610 or Fax: 0870 011 4568
Tapered ThreadStandard Product Code Bar Diameter
TTS12 12mm
TTS16 16mm
TTS20 20mm
TTS25 25mm
TTS32 32mm
TTS40 40mm
TTS50 50mm
Tapered Thread StandardAncon Tapered Thread Standard couplers aredesigned to suit the majority of applications
which call for the joining of reinforcing bars.
The couplers are normally supplied fitted to
the end of threaded bar, requiring only the
engagement and tightening of the adjoining
bar on site. Ancon specifies the use of atorque wrench in order to achieve correct
and consistent installation.
Tapered ThreadPositional
The Ancon Tapered Thread Positional coupler
is designed to be used in applications in which
neither bar can be rotated. Having a degree ofadjustability, the Positional coupler can also
be used as a closer between two fixed bars.
The couplers are normally supplied fitted to
the end of threaded bar, requiring only the
engagement and tightening of the adjoining baron site. In order to ensure correct and consistent
installation, Ancon Building Products specifies
the use of a torque wrench.
Product Code Bar Diameter
TTP12 12mm
TTP16 16mm
TTP20 20mm
TTP25 25mm
TTP32 32mm
TTP40 40mm
TTP50 50mm
Tapered Thread Positional
Tapered ThreadTransition Product
Code
To suit bar
Diameter
TTT12/16 12mm
TTT16/20 16mm
TTT20/25 20mm
TTT25/32 25mm
TTT32/40 32mm
TTT40/50 40mm
Tapered Thread StandardThe Ancon Tapered Thread Transition couplerconnects reinforcing bars of different diameters.The coupler comprises an internally threadedsleeve with two right hand threads both of whichare tapered towards the middle of the coupler.The diameter of each thread corresponds to theappropriate bar size. The couplers are normallysupplied fitted to the end of threaded bar,requiring only the engagement and tighteningof the adjoining bar on site. In order to ensure
correct and consistent installation, Ancon BuildingProducts specifies the use of a torque wrench.
MBT Coupler
The MBT ET Series of couplers provides
an effective method of joining reinforcing
bars which requires neither bar endpreparation to form threads, nor bar
rotation. They can be used to connect
onto insitu bars and will join imperial,
plain round or deformed reinforcing bars.
Product Code To suit bar Diameter
MBTET 12 12mm
MBTET 16 16mm
MBTET 20 20mm
MBTET 25 25mm
MBTET 32 32mm
MBTET 40 40mm
MBTET 50 50mm
MBT Coupler
Reinforcement ConnectionAncon Couplers
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ROM ShearLadder System
Used to resist punching shear in flatslab construction where a slab is
suspended on either columns or piles
Simple to fix
Time savings in placing
Variable link diameters, centresand heights
Supports top layer of reinforcement
Concrete covers ensured
Easy to specify
Complies with the requirementsof BS 8110
Placing Sequence
Step 3
Step 2
ROMTECH ShearLadder System
Bottom layers of reinforcement fixed in
position (B2 loose rebars may be fixed afterShear Ladders are placed onto B1 layer).
1.
Shear Ladders are placed onto B1 layer
(recommended) that Shear Ladders are tied
to B1 layer to avoid possible displacement.
2.
Top reinforcement fixed. Shear Ladders can
now act also as support chairs.
3.
Step 1
Shear SystemROMTECH Shear Ladder System
Typical Section
Numbers, diameters and centres of links to
suit engineers design and details.
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Formwork AccessoriesTie Bar System
ROM ShearLadder SystemTie Bar System
Tie Bar is produced from high tensile steel with a screw thread(deformation conforming to ASTMA 618 for reinforcing steel bars).
Wing nut
Plastic cone
Sacrificial plastic tube
ProductCode
Diameter Pack Size Length
15RT6000 15mm 6.0M
15RT7500 15mm 7.5M
20RT6000 20mm 6.0M
Tie Rod
TR(Cutting serviceavailable at extracharge)
ProductCode
Diameter Pack Size
CWN15 15mm 1
CWMF15 15mm 1
CWN20 20mm 1
Wing Nuts
CWN
ProductCode
Style To Suit Dia.
PWP90 Pressed 15mm
HDW Heavy 15mm
HDW20 Heavy 20mm
Waler Plates
PWP90
HDW
ProductCode
Diameter
RTS22 1OOM Pack
RTS26 50M Pack
RTC22 500
TSC26 500
Tie Road Sleeve & Cones
Product
Code
Pack
SizeRPLUG 75N 7.5 Kg
Romplug - Tie Holder
ProductCode
Diameter
RTCN15 15mm
RTWB15 15mm
RTCN20 20mm
RTWB20 20mm
Connectors/Water Barrier
TRWB
TRCN
TRS
TRC
RPLUG
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ROM ShearLadder SystemIntroduction
ROMTECH Geotechnical is a specialist division of ROMTECHthat supplies and offers technical support for
Geotechnical products.
ROMTECH provides a broad range of products and services for
soil nailing, rock bolting, anchor, mini & micro piling applications.
Our services are rapidly expanding to suit market needs,customer requirement and expectations, including:
ROMTECH fully threaded bar and accessories
(grade 550, 800 and 1050)
ROMTECH hollow bar self drill soil nails and anchors(also known as injection anchors)
XpandX is a unique mechanical anchoring system for soil
nailing and rock bolting which gives instant pull-out load
without grouting
All our systems have a comprehensive range of accessoriesand specifications to meet the most demanding challenges.
Our manufacturing capability enables us to manufacture
special items specific to our customers requirements.
Combined with our research and development policy this
means that we are able to continually update and improve
our products.
In addition to this commitment we also carry comprehensive
stocks of black, galvanised and stainless steel products.
Regardless of the size of your project it is our policy to offer the
best technical support and service to ensure our customers
get the most appropriate and cost effective solution.
Our growing portfolio and customer base has established
ROMTECH as a leading Geotechnical supplier. Combined
with the expertise of the piling and tunnelling divisions, our
innovative product design and specialist skills are the driving
force of quality and service to the industry.
Hollow Bar self drilling solutions
Soil nailing
Mini and micro piling
Mining and tunnelling
Tie Rods
Pre-stressed soil and rock anchors
Post tensioning systems
Formwork ties
GeotechnicalIntroduction
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GeotechnicalGround Anchors
Ground Anchors and Piles can be used to provide Global
Stability in an Earthworks structure. They (unlike Soil Nails)
are actively loaded from the onset. Temporary uses include
tie backs to sheet piles, and temporary works stabilisation of
open excavations during contract period.
Installed on a grillage, lightly-loaded, with a short shank
length and without pre-tensioning. Hollow self drill option
is quick and easy to install (drill, flush and grout in one
operation). Harder drill bit (eg. Tungsten Carbide Button Bits)
are also available. The product is also suitable for connecting
friable surface material to hard substrate.
Ground Anchors Rock Bolting
Stabilises existing structures through
underpinning where installation access (bothhorizontal and vertical) is limited. Principle is
that of single central bar and ability to couple
this. Other applications include the upgradingof strip footings, stanchion bases and Network
Rail power gantry bases.
Micro Piling
Stabilise shallow depth ex-foliated rockface
by tying back to the stable rock above, inpreparation work for N.A.T.M. technique.
Hollow bar format provides conduit for
grouting. Exposed ends can be used to bolt onand support further reinforcement layers.
Spile Applications
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GeotechnicalSelf - Drill Hollow Bar - Key Dimensions & DesignData
Hollow Bar Technical Data
Typical Thread Bar Couplers &Termination Accessories
Typical Hollow Thread Bar
ROMTECHs Hollow Bar system is a continuously threaded left handed steel bar which can be drilled and grouted into loose,
unstable and collapsing ground. The steel is a hollow configuration to allow for simultaneous drilling and grouting, a technique
designed for eliminating the need for pre-casing, therefore increasing the installation rate.
Produced from hollow steel tubular raw material, the bar is cold rolled into a standard ISO rope thread during which the
formation of steel is enhanced, providing the yield strength. The rope thread provides an appropriate surface between the bar
and the grout, therefore enabling a strong, resilient bond to be created.
ROMTECH Self Drill Hollow Bar provides effective solutions for rock bolting, ground anchoring, micro piling, soil nailing and
spiles applications.
R25 R32 R32 R38 R51 R63 R76 R89 R103
Max Diameter over Threads (mm) 25 32 32 38 51 63 76 89 103
Internal Diameter (mm) 13 20 15 15 28 43 56 69 83
Effective Cross Sectional Area of Bar (mm) 325 447 560 780 1200 1660 2080 2450 2920
Ultimate Strength (kN) 200 280 405 530 838 1100 1380 1600 1980
Tensile Yield Strength (kN) 160 230 335 440 693 909 1140 1280 1636
Steel Grade Yld/Ult (N/mm) 515 515 598 564 577 547 548 522 560
E Modulus (N/mm) 200,000 190,000 190,000 190,000 180,000 180,000 170,000 170,000 170,000
Weight (kg/m) 2.30 3.51 4.40 6.12 9.50 13.32 16.33 19.24 22.93
Thread Type R R R R R R R R R
Steel Quality S355 Fe55 Fe55 Fe55 28MnB5 28MnB5 S355 S355 S355
Bar Lengths (m) 3.0m, 4.0m
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ROM ShearLadder SystemROMTECH HollowBar System
Self Drill Hollow Bar Systems can be installed into a range ofdifferent media:
Cohesive soils such as clays
Granular Material sand & gravel
Friable fill material rubble, infantile or weathered rock, boulders
Existing structures basement walls, slabs and strip footings
Applications include:
Soil Nails for surface stabilisation of embankments & cuttings for road& rail projects
Permanent or temporary ground anchors for global stabilisation ofsimilar works, sheet pile tie backs, mini piles for underpinning & localstabilisation of existing foundations
Coastal defence walls & slabs
Wall anchoring (concrete, modular, crib and gabion)
Hard or soft green finishes
Black, galvanised and stainless steel products for all environments
Roof bolts or spiles for mining & tunnelling applications
Typical projects:
Highway and railway embarkments
Coastal defence walls and slopes
Temporary support for basement work
Mining and tunnelling
Rock netting and overburden stabilisation
1.
2.
3.
4.
GeotechnicalSelf - Drill Hollow Bar
Shotcrete or
GeogridBorehole GroutGrout Bulb
RetroflushDrill Bit
ROMTECHHollow Bar
Centre StopCoupler
Formed BearingPlate
Galvanized Top
Section
Domed
Galvanised Nut
RetroflushDrill Bit
BoreholeGrout
CentreStop
Coupler
GroutBulb
PlateAnchorage
LoadBearing
Hex,Nuts
Pile Head
Anti-Flotation Tension Minipile
Soil Nail Threadbar For Surface Slope Stabilisation
HollowBar
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Clay
Available in 42mm 200mm
Suitable for soft clay
type soil
Triple Edge with Widia*
Available in 51mm 150mm
Suitable for chalks, marls
and mudstones
Triple Edge
Available in 51mm 150mm
Suitable for chalks, marls
and mudstones
Cross Cut with Widia*
Available in 42mm 130mm
Suitable for
limestone, moderate
rock and concrete
Cross Cut
Available in 42mm 130mm
Suitable for gravel,
sandstone, limestone and
most ground conditions
Button Bit with Widia*
Available in 42mm 150mm
Suitable for limestone and
hard rock, boulders and
through concrete slabs.
Button Bit
Available in 42mm 150mm
Suitable for gravels,sandstone and soft rocks.
Reducing Couplers
Drill bits can be manufactured
as required, however
reducing couplers are also
available for adopting a larger
drill bit thread onto asmaller bar.
GeotechnicalSelf - Drill Hollow Bar - Drill Bits
Drill Bit options
Drill bit type all sizes are mm 25/13 32/20 32/15 38/15 51/28 63/43 76/56 89/69 103/83
Clay - 76 76 130 130 130 130 130 130
- 100 100 180 180 180 180 180 180
- 130 130 - - - - 230 230
Cross cut (2 grades*) 42 51 51 64 90 90 102 130 150
- 76 76 76 102 102 115 - -
- 95 95 95 115 115 - - -
Button bits (2 grades*) 42 51 51 76 90 90 100 130 150
- 76 76 90 115 115 115 - -
Triple edge bit - 51 51 76 76 90 115 130 150
*Widia means hardened leading edges for heavy duty use only.
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GeotechnicalInjection Adapters
ROM ShearLadder SystemROMTECH Geotechnical supplies a comprehensive rangeof components and installation equipment
Standard rotaryinjection adapter
Light to medium duty injection
adapter ideal for hand held
equipment and light to medium
duty applications using drilling rigs.
Comprehensive range of adaptersto suit a wide range of input and
output configurations.
Generally available ex stock.
High Pressureinjection adapter
For use in all applications and
particularly where grout is being
injected at high pressures.
Comprehensive range of adapters
to suit a wide range of input andoutput configurations.
Generally available ex stock.
Shank adapter
For use with hand held rigs whereopen holing is necessary. Use end
injection adapter to inject grout.
Generally available ex stock.
End injection adapter
Fits directly on the end of the barwhen open holing installation has
been used.
Generally available ex stock or can
be modified and manufactured to
order.
ROM Shear
Ladder SystemROMTECH Hollow Bar Self Drilling test EquipmentROMTECH Geotechnical supplies components for stressing and testing soil nails either to buy or to hire. The photograph
below shows a typical layout, but we can also supply specialist equipment such as electric pumps, various jacking columns
and specially manufactured frames to your specification.
The anchor traction tests are made with a hydraulic cylinder (6) which is set under pressure by a hydraulic manual pump (9).
The relative force is indicated on a manometer in tons.More exact values (5%) can be obtained using an additional dynamometer box. The entire system is easily to transport,
simple to handle and needs neither compressed air not current.
Preparation
The contact surface on the rock should be plane and
right-angled to the rod. As surface and equalizersserve the plate (3) and the metallic set of wedges (2).
Coupler
Wedges
Plate
Jacking column
Anchor/soil nail
Hydraulic load cylinder (300 600kN)
Washer
Nut
Manual pump
1.
2.
3.
4.
5.
6.
7.
8.
9.
1 2 3 4 5 6 7 8
9
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SSL TODRAW
GeotechnicalSolid Threadbar Applications
Anchoring and soil nailing
Good tension and shear characteristics
Bar diameters from 16mm - 75mm (RT550 and RT800)
Bar diameters from 18mm - 75mm (RT1050)
Galvanised and epoxy coatings available
Double corrosion protection specification available
Anchored or soil nailed slopes and walls
Tie rods for retaining walls, sheet piling and foundations
Micro and mini piling
Tension and compression applications
Comprehensive range of couplers and accessories
Bar diameters from 16mm - 75mm (RT550 and RT800)
Galvanised and epoxy coatings availableDouble corrosion protection specification available
Applications include ground beams, slabs and tanks
Tunnelling and mining
Anchoring, doweling and roof bolts
Roof bolts
Resin, OPC or expansion shell anchorage
Bar diameters from 16mm - 75mm (RT550 and RT800)
Bar diameters from 18mm - 75mm (RT1050)
Galvanised and epoxy coatings available
Various specialist accessories loops etc.
Post tensioning systems
Prestressed or post tensioned applications
Post bonded or debonded to suit
Permanent strengthening of weak structures
Temporary bracing during refurbishment
Bar diameters from 18mm - 75mm (RT1050)
Temporary Works Anchor Piles - Pile testing
Much higher load capacity than rebar through both high
grade material and larger diameter bars
Grades availability 550N/mm2
to 1050N/mm2
Bar size range = 15mm to 75mm
Congestion relief through fewer, larger bars
Economic cage fabrication through fewer rebar joints
Factory welded fabrication available in 550 and 800 grades.
1050 grade to use patented ROMTECH clamping techniques
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GeotechnicalSolid Threadbar Applications
Tie backs
Due to the high variety of steel qualities and diameters, our
threadbar system can fulfil the requirements of the different tierod construction designs in an optimal way. Main applications
of tie rods are bracing for embankments, sheet-pile, shed-roof
and frame structures, as well as tie back retaining walls.
Pre-stressed Soil and Rock Anchors
Anchors are elements which introduce compression forces intothe ground through tension members. For this, the anchorage
head conducts the forces into the grouted body, which
transfers the load safely into the surrounding material.
Main areas of applications of Pre-stressed soil and rock
anchors are slopes, embankments, excavations as well as
cavern and tunnel construction.
Anchor with single and double corrosionprotection components:
Threadbar
Dome Nut
Anchor PlatePipe Socket
Smooth Sheathing
Cement Grout
Spacer
Injection and Protection Cap
Corrosion Grease
Vent Cap
Corrugated Sheathing
End Cap
Post Tensioning SystemThere has been a continuous development of the threadbar
product into the various post tensioning applications inherentin glued, segmental bridge construction. Such techniques
using various methods of cantilevering and incremental
launching rely on the post tensioning bars for the longitudinal
and transverse connection of segments both in the temporary
and permanent sense.
The ease of installing and stressing threadbar lends itself to
applying a triaxial stress field to the concrete. This, as a means
of crack control makes threadbar a prime candidate for
marine applications.
Installed by Dawson-Wam
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GeotechnicalSolid Threadbar Applications
ROM ShearLadder SystemApplications
In general the RT550 and RT800 are ideal for soil nailing applicationsbecause they have an excellent range of accessories and the most
beneficial yield properties.
RT1050 is widely regarded as the best grade for post-tensioning andother applications where exceptional tensile strength coupled with good
elasticity is required.
Other grades have various properties which make them ideal for general
reinforcement and formwork ties.
1.
2.
3.
Notes:
Grade (yield/Ultimate)
Nomdia (mm)
Yield load(kN)
Ult (kN) (m/tonne) Weight(Kg/m)
ElongationAgt (%) A10 (%)
RT550 (500/550)Geotechnical andreinforcing
12 57 62 1123.6 0.89
6 10
16 100 110 632.9 1.58
20 160 175 404.9 2.47
25 245 270 259.7 3.85
28 310 340 207.0 4.83
32 405 440 158.5 6.31
40 630 690 101.3 9.87
50 980 1080 64.9 15.40
63.5 1760 2215 40.2 24.86 5 10
RT800 (670/800)Geotechnical,tunnelling andmining
18 170 195 510.2 1.96
5 10
22 250 300 340.1 2.94
25 330 390 259.7 3.85
28 410 490 207.0 4.83
30 475 565 180.2 5.55
35 640 770 132.5 7.55
43 980 1170 86.9 11.51
57.5 1740 2080 49.1 20.38
63.5 2120 2540 40.2 24.86
75 2960 3535 28.8 44.68
RT1050 (950/1050)Post-tensioning
18 230 255 510.2 1.96
5 7
26.5 525 580 223.2 4.48
32 760 850 153.1 6.53
36 960 1070 120.9 8.27
40 1190 1320 97.9 10.21
47 1650 1820 70.9 14.10
57 2155 2671 47.7 20.95
65 2780 3447 36.9 27.10
75 3690 4572 27.9 35.90
RT1100 (900/1100)Formwork ties
15 159 195 694.4 1.44
4 720 283 345 390.6 2.56
26.5 461 568 223.2 4.48
15 175 190 709.2 1.413 7
20 310 345 398.4 2.51
Cold rolled S850
Formwork ties
15 140 170 666.7 1.50
5 1020 245 280 384.6 4.60
26.5 385 490 217.4 4.60
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GeotechnicalSolid High Yield RT550 & RT800 Threadbar
Recommended Component Details
RT550 continuous threaded bar
Left hand thread Hot rolled, ribbed
Steel grade 500/550 N/mm2 with10% elongation
Special Coatings
Galvanized to various specifications available on request
Epoxy coatings to ASTM A934/A934M and A775/A775M available on request thickness u + 250 microns
1.
2.
ROMTECH Threadbar System
Anchor Components 1 Coupler Detail for Connection in Tension orTension and Compression
Anchor Components 2 Coupler Detail using Visible Contact Coupler forConnection in Compression only
Bearing Plate
Coupler Spacers
Load Bearing Hemispherical nut
Grout
RT800 continuous threaded bar
Right hand thread Hot rolled, ribbed
Steel grade 670/800 N/mm2 with 10% elongation
Applications
Soil NailsSheet Pile Tie Backs
Threadbar Pile Cages
Holding Down Bolts
Temporary Anchors
Permanent AnchorsMicropiles
Rock Bolts
Factory Weldable to BS 7123 and EN / ISO / 17660
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GeotechnicalROMTECH Solid High Yield RT1050 Threadbar
RT1050 continuous threaded bar
Right hand thread Hot rolled, ribbed
Steel grade 950/1050 N/mm2 with 7% elongation
Special coatings
Galvanising to various specifications available on request
Exopy coatings to ASTM A934/A934M and A775/A775M available on request thickness u = 250 microns
1.
2.
Dynamic Coupler Detail for Tension andCompression for RT1050
*Dynamic coupler can be locked in place using lock nut,shrink sleeve or proprietary locking adhesive
ApplicationsGround anchors
Tie Bars
Post tensioning
Permanent strengthening of weak
structures
Temp bracing during refurb
Form ties
Anchor pile cages (clamped non- welded
cage former system)
Tension piles to wind turbine foundation
Dynamic Coupler* RT 1050 only
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GeotechnicalCorrosion Protection
Suggested Component Details
DCP system consists of:
Bar and couplers where necessary
Internal spacers fixed to the bar to centralize it in the HDPE
sheathing
Inner cement grout
HDPE or PVC corrugated sheathing
End caps for grout feeding and air venting
External spacers fixed to the external sheathing to ensure a
minimum of 10mm grout cover
External grout and vent tubes as required depending on
ground conditions and bar inclination)
External cement grout
Storage instructions
Care should be taken at all times to ensure that the units are
not damaged either by bending or mishandling
Storage of the nails and components should be in a properly
covered and protected areaThe manufactured components should be stored
horizontally at all times
Finished units should never be stacked, but should be properly
supported on timber racks to ensure they do not deflect
Handling and site transport
Care should be taken when transporting the nails to the
fabrication yard and from the yard to the borehole. The nails
should be adequately supported (bracing or support at a
maximum distance of 1.5 - 3.0m depending on diameter of
bar) so as not to damage the pre-grouting.
To avoid bending the bar by lifting it, check carefully and if
necessary, reduce distance of support.
During transport, the nails should be laid flat on suitable
transport and with supports between the layers of nails.
Care should be taken not to knock the nails so as to avoid
the pre-grouting cracking.
The nails can be lifted and transported by crane with a brace
of lifting device on the air-sided end of the bar (ring nut etc.).
Take care that by lifting the bar does not bend and the enddoes not slip on the ground.
1.
2.
3.
4.
1.
2.
3.
4.
ROMTECH can manufacture Anchor Head details to
ensure corrosion protection at termination for any
application size and specification.
ROMTECH offers a wide variety of corrosion protection systems to suit all ground conditions and applications from temporary
anchors to Permanent Anchors
GalvonisingEpoxy coating
Single Corrosion Protection
Double Corrosion Protection
Anchor head details
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Tunnelling and MiningTunnelling and Mining
Lattice Girders
ROMTECH Lattice Girders* are offered in a comprehensive
range of sizes to suit all sprayed concrete linings.
Any configuration or bespoke design can be accommodated to
suit the proposed tunnelling sequence or method of operation.
Our lattice girders are designed to produce a minimum shadow
profile to provide effective sprayed concrete encapsulationand are manufactured to ensure dimensional accuracy of the
finished components.
ROMTECH Lattice Girders have been used on a number of
prestigious projects in the UK including Heathrow Express,Jubilee Line, North Downs Rail Tunnel, Dublin Port Tunnel.
*ROMTECH Lattice Girders are also manufactured under
license in Australia and the USA.
Segmental Cages
ROMTECH Segment Cages are specifically designed to suit
the particular requirements of each precast manufacturer
and can be assembled from machine made Kwikfix
resistance welded mesh and ladders and / or loose bar.
We provide fast production on purpose made jigs for accuracyand simplicity to ensure accuracy of +/- 5mm tolerance.
ROMTECH Segment Cages have been used on a number of
prestigious projects in the UK including the Channel Tunnel,
Copenhagen Metro, Heathrow Express, Heathrow Airside
Road Tunnel, London Ring Main and various other water andsewerage tunnels.
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GroundworksIntroduction
Introduction
ROMTECH Groundworks Incorporating Modern Methods of Construction
ROMTECH Groundworks are in the business of providing Total Package Engineered Solutions to the Construction Industry.
To this end our many products offer significant savings over traditional methods of construction and include:
Our service includes:
A fast response to any enquiry received
A professional, friendly and customer focused manner of conducting day to day business
The continuous development of new and innovative products to solve construction problems
Full take-off and quantification of products from drawings and schedules received
Full in-house engineered support to the end user
Electronic ordering
Single invoice per site per month
Building on and strengthening existing and new account relationships through partnering
By the continuous development, retention and expansion of our existing team of dedicated, customer focused professionals,
we aim to become the first people contractors contact when they have a project to begin.
Prefabrication Beamform Permanent Formwork Clay Heave Protection
Thermaflor Accessories
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GroundworksPrefabrication
ROMTECH Groundworks offer a complete off site CARES Approved(steel & welding Appendix 6) prefabrication service on
All cages are labelled for ease of identification, and are supplied with a layout drawing for accuracy and speed of placement.
Splice bars are loose-tied inside the relevant cage
Prefabrication offers a reduction in the need for skilled labour, which can lead to a reduction in programme, a reduction in
waste caused by unforced errors, and an improvement in site Health and Safety.
A key benefit of ROMTECH prefabrication is that semi - skilled site operatives are able to instal l cages in a few hours ratherthan the normal 1-2 days of the loose rebar option.
Deliveries can be phased to an agreed programme: this being particularly useful in tight or restricted sites. Colour coded
labels can be factory fitted for easy site identification of delivered components.
Using customers General Arrangement (GA) and Reinforced Concrete (RC) drawings and
schedules, we identify the opportunities for rebar prefabrication where appropriate. By
liaising with The Engineer, we are able to provide alternative solutions which offer commercial
cogency in terms of programme and site productivity. In addition, fewer prefabricatedcomponents of known weight & size, mean fewer, better organised site operations, leading to
significant benefits in site Health and Safety.
Such objectives are achieved for groundbeams by detailing for maximum prefab cage length
with a minimum of loose rebar cage to cage connections. The provision of factory welded
skid spacers provides soffit support to beam cages off the blinding and avoids the site fittingof separate spacer units. The colour coding of prefab beam elements, as depicted on theROMTECH layout plan, offers the possibility of rapid, accurate site - installation. In addition,
the LOLER - compliant cage offload system allows the consignment to be removed without
the need to climb onto the vehicle deck.
ROMTECH Shear Ladders avoid the usual sausage link detail which requires loose rebar
upper and lower reinforcement layers in two way spanning suspended slabs. This producttherefore permits the use of heavy prefabricated mesh layers above and below while
furnishing both an adequate punching shear resistance in the finished slab and an effective
means of spacing upper and lower mesh around the column head.
In the case of retaining walls and suspended slabs, ROMTECH can offer the options of
various bar diameters and centres, staggered bar locations and flying ends within itsindividual prefabricated mesh or mattress units. The main site benefits of these features are
a reduced site installation period, an alleviation of congestion at laps and a reduction of the
working at height element.
Prefabrication
Ground beams,
Pile caps
Pad foundations
Toe beams
Shear Ladders
Retaining walls.
1.
2.
3.
4.
5.
6.
4 5 6
321
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GroundworksBeamform
Developed in the mid nineties by Construction professionals, Beamform is manufactured from high density expanded polystyrenewhich ensures robustness for back filling purposes. In excess of one million units have been successfully installed to date.
This simple, one component system, is an ideal solution for numerous formwork applications and utilises unskilled labour with
no specialist plant requirements.
Beamform is ideally suited for use with ROMTECH prefabricated cages and offers significant time savings on construction
program cycles, with minimum waste, when compared to traditional methods and other sacrificial systems.
Available Ex-stock, delivered to site palletised, Beamform is supplied in heights ranging from 350mm to 750mm in 50mm
increments and may be stacked where depths of pilecaps or beams exceed the maximum unit height.
Beamform by nature is light but strong, allowing easy positioning by one unskilled person, who will be able to install in excess
of 250m per day, safely and quickly. The correct installation is helped by the tongue/grooved ends for the self location of
adjacent units; this complying with Best Practice Guidelines relating to formwork.Formwork must have a continuous line and shape before, during and after the concrete pour
The inherent strength of Beamform allows the excavated material from site to be reinstated as backfill, rather than importing
material at an additional cost.
Since Beamform is installed after the reinforcement, specified cover is achieved by the use of Grippa Plate Spacers
which clip on to the links. Once backfilled safe, unimpeded access for all other trades working on site results. The speed ofinstallation ensures that open trenches, subject to adverse weather conditions become a thing of the past.
Although initially being designed for use below ground on sites with ring beams and pile caps, the versatility of Beamform has
meant that users have enjoyed the same benefits above ground, on toe beam rafts, pad foundations, stepped footings, radius
beams, unreinforced foundations (to save otherwise wasted concrete) and reinforced concrete slabs.
A simple formwork solution for concrete groundbeams & pile caps.
Ideally suited for use with prefabricated beam cages
Reinforcement cages placed prior to Beamform
Lightweight easily positioned by one man
No specialist equipment required
Safe to handle
Easy to estimate quantities
Available ex-stock
Manufactured in one metre lengths from high density EPS
Beamform
Standard PackCommon base measurement of 1.0m x 1.2m. To a maximum height of2.4m (including pallet) Stretch wrapped and marked with contents.
Product AppraisalAn independent product appraisal by Gardiner & Theoboldconcludes that Beamform is half the cost (labour and materials)
and 10 times quicker to install than traditional timber formwork.
BeamformPermanent Formwork
Height Product Code Pack Size
350mm BF35 64
400mm BF40 48
450mm BF45 48
500mm BF50 48
550mm BF55 32
600mm BF60 32
650mm BF65 32
700mm BF70 32
750mm BF75 32
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GroundworksBeamform
Method statements are available on request for all applications ofthis easy to use, versatile formwork system, but general use in a
groundbeam situation would incorporate the following steps.
Blind bottom of trench.
Place spacer bars onto cured blinding. Lift prefab cages into
place and connect cage ends using integral loose tie bars.
Clip on Grippa Plate spacers to ensure the correct side cover.
Offer Beamform units up to spacers. Units will self locate against
each other with tongue/grooved ends, cutting units to suit where
necessary (save off-cut for use elsewhere where possible).
Backfill behind units to hold in place, leaving safe unimpededaccess for following trades.
Pour concrete.
For new users, we offer