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7/29/2019 A3 Stair Balustrade Technical Data Sheet
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A3
Appendix3
Treads
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Appendix3
Treads
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This is a reerence guide tostandard treads used in theArden Elements range. Manycustom staircases will demandtheir own unique tread design.Also, new developmentsin architectural ooring
materials and slip-resistantstrips naturally ensure thattread specications are in acontinual state o evolution.
This appendix can be used inconjunction with other Ardentechnical data sheets to aidin the specication process.Most tread designs listedhere are specied to workwith other Arden staircaseor stringer elements. It is ourhope that it may be usedby architects to help withpreliminary tread specicationearly in the design process.
As with all aspects ostaircase design, treadspecications may need to bealtered to meet site-specicrequirements.
STT-1
Solid timber tread
165
rise
Nominal
250
Going
42
Treadthickness
280
Tread
widt
h
R6
Gap between treads mustnot excede 125mm
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STT-2
Solid timber tread with non-slip strip
STTR-1
Solid timber tread with riser board
160
Rise
Nomi
nal
275
Going
Gap between treads mustnot excede 125mm
Rebated non-slip strip
300
Tread
widt
h
R6
42
Treadthickness
Rebated non-slip strip
Applied nosing bonded to treads.This reduces tread to tread gap
to less than 125mm.
End of nosingbevilled to treadfor open edged
stair design.
120
60
180
rise
Nominal
300
Trea
dwidth
32
19
STT-3
Solid timber tread with non-slip stripand applied nosing with bevelled endsor mono-stringer application
19
Riserthic
kness
32
Tread
thick
ness
180
rise
Nomi
nal
Expressed Joint
270
Going
R6
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Several standard solid timbertread (STT) specications areshown, some incorporatingslip-resistant strips and/orapplied nosings. Solid timbertreads with risers (STTR)also show options or either
vertical or raked riser boards.Laminated timber treads(LTT) involve a compositeconstruction and may beselected or greater thicknessor stability. Alternatively theymay be required due to thespecication o rubber or vinylon the top surace, and/or toallow or the incorporation ostructural steel supports thatare xed to stringers. Some
o these designs incorporateapplied edge trim as well asnosings. Laminated timbertreads with risers (LTTR) maybe designed with the bottomaces o the treads to bevisual or non-visual. The stackblock tread (SBT) is a specialdesign that represents amethod o cladding a stringerin order to create an illusion ostacked blocks. The diagramsshowing reconstituted stone
treads (RST) and ceramic tilecovered treads (CTT) illustratetypical ways o approachingthis kind o oor surace ontreads.
STTR-2
Solid timber tread with riser boardand non-slip strip over nosing
270
Going
32
Tread
thickn
ess
Rebated non-slip stripoverlaps nose to reduce wear.Strip also conceals screw heads.
Expressed Joint
180
rise
Nominal
19
Riserthic
kness
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19
Riserthi
ckness
270
Going
180
rise
Nominal
32
Tread
thickn
ess
Rebated non-slip strip
STTR-3
Solid timber tread with riser boardand non-slip strip back rom nosing
STTR-4
Solid timber tread with raked riserboard
STTR-5
Solid timber tread with riser boardand applied nosing
Expressed Joint
Rebated non-slip stripoverlaps nose to reduce wear.Strip also conceals screw heads.
Raked riser
84.0
270
Going
180
rise
Nomina
l
32
Tread
Thick
ness
19
Rise
r
Thick
ness
270
Going
180
rise
Nominal
32
Tread
thi
ckness
19
Riser
thickn
ess
42
Nosin
g
depth
19
Nosin
g
thickn
ess
Shown with returnnosing for exposed edge
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LTT-1
Laminated timber tread
LTT-2
Laminated timber tread with non-slipstrip and resilient insert
LTT-3
Laminated timber tread withembedded support plate
275
Going
53
Tread
thickn
ess
300
Tread
widt
h
173
rise
Nominal
MDF or ply core
Dress wood 19mm"picture frame" nosing
Dress wood veneertop and bottom
Dress wood veneertop and bottom
MDF or ply core
Dress wood19mm "pictureframe" nosing
Rebated non-slip strip
250
Going
170
rise
Nomina
l
Resilient insert forhigh traffic stairs
53
Tread
thickn
ess
30
Overl
ap
180
Ri
se
Nomi
nal
270
Going
62
Tread
thickness
300
Tread
width
Full width steel supportplate connects tostringers on each side
3 piece tread is assembledaround steel tread plate
LTT-1
Laminated timber tread
LTT-2
Laminated timber tread with non-slipstrip and resilient insert
LTT-3
Laminated timber tread withembedded support plate
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3 piece tread is assembledaround steel tread plate
Full width steel supportplate connects tostringers on each side
270
Going
180
ri
se
Nomi
nal
30
Overl
ap
62
Trea
d
thick
ness
Rebated non-slip strip
LTT-4
Laminated timber tread withembedded support plate and non-slipstrip
LTT-5
Laminated timber tread withembedded SHS supports
LTT-6
Laminated timber tread with non-slipstrip olded tread plate and ull widthresilient insert
180
ri
se
Nomi
nal
67
Tread
thi
ckness
270
Going
360
Tread
widt
h
40mm SHS supports strengthentread and attach to stringer
MDF or ply core
Dress wood veneertop and bottom
Dress wood 19mm"picture frame" nosing
270
Going
180
ri
se
Nomi
nal
MDF or ply core
75
front
ofsta
ir
Visualth
ickne
ss
Folded steel tread platetypically welded to steelstringer at sides
Resilient insert forhigh traffic stairs
Non-slip strip
Dress wood nosing bonded to core
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LTT-1
Laminated timber tread
LTT-2
Laminated timber tread with riserboards visual sot with non-slip strip
LTTR-3
Laminated timber tread with riser
boards non-visual sot
LTTR-2
180
rise
Nominal
270
Going
62
Trea
d
thick
ness
62
Riser
thick
ness
MDF orply core
Dress wood topveneer and riser
R6
Dress wood end cappingfor exposed edge stair
Dress wood bottom veneerfor stairs with visible underside
180
rise
Nominal
270
Going
62
Trea
d
thick
ness
62
Riser
thick
ness
Dress wood end cappingfor exposed edge stair
Dress wood topveneer and riser
Dress wood bottom veneerfor stairs with visible underside
MDF orply core
Rebatednon-slip
strip
180
rise
Nominal
MDF orply core
Dress wood topveneer and riser
270
Going
47
Trea
d
thick
ness
47
Riser
thick
ness
R6
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LTTR-4
Laminated timber tread withembedded support plate and non-slipstrip
SBTT-1
Stack block tread interior
SBTT-2
Stack block tread exterior
180
ri
se
Nomi
na
l
Dress wood topveneer and riser
MDF or ply core
270
Going
47
Riser
thickn
ess47
Tread
thickn
ess
Rebated non-slip strip
180
rise
Nominal
Going 270
Rebatednon-slip strip
Steel stringer withtread & soffitsupport plates.
Soffit, treads and side returnscompletely enclose stringer
13
18
180
rise
Nomina
l
270Going
Shadow lines on returns
and riser boards visuallyseperate treads to create"Stack Block" appearance
10
170
10
Rebatednon-slip strip
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RST-1
Reconstituted stone tread weldedsteel support
RST-2
Reconstituted stone tread reinorcedconcrete support
CTT-1
Ceramic tile covered tread reinorcedconcrete support
180
rise
Nominal
300
Tread
widt
h
270
Going
Reconstituted stone tread
Non-slip ribs
Welded steel support plate40
20
65
115
180
rise
Nominal
Non-slip ribs
Reconstitutedstone tread
Folded steel trough containsthe reinforced concrete
Rebar
Reinforcedconcrete
270
Going
1.2mm zinc annealedsteel snap cover soffit.
Powder coated tocustomer requirements
40
94
180
rise
Nominal
Folded steel troughpowder coated to suit
Non-slip strip
Rebar
Reinforcedconcrete
Ceramic Tiles
Grout
270Go
ing
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complianceArden is a BSA licensed contractor or carpentry, joinery, glass, glazing
and aluminium as well as structural metal abrication and erection. Arden
supplies a Form 16 (Licensed Contractor) on all projects. In design and
construct contracts, a Form 15 (Design Engineer) certication is supplied
upon request. Please see specic product technical data sheets to check
level o compliance with relevant codes and standards.
For all commercial applications, it is important that sufficient spacefor the stairwell cavity be allowed to satisfy Australian Standardsand BCA requirements.
The ootprint is primarily driven by the oor to oor rise, as well as the
staircase conguration chosen. However, stringer and balustrade style design
may increase the amount o space required. Allowing too small a cavity can
restrict the design options o the staircase. Also, points at where the staircase
interacts with other structures are best addressed early in the design cycle.
Consultation with Arden early on will help ensure that these design issuescan be addressed in a cost-efective manner.
About this document
Intellectual property is copyright Archstairs
Pty Ltd unless otherwise agreed in writing. All
rights to the document are retained. Any useo the document by clients or third parties,
unless specically authorised by Archstairs
Pty Ltd, are at their own risk and the userreleases and indemnies Archstairs Pty Ltd
rom and against all loss or damage arising
rom such use.
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phone (07) 3267 6100 | fax (07) 3267 6500 | email [email protected]
www.arden.net.au