A3 Stair Balustrade Technical Data Sheet

7/29/2019 A3 Stair Balustrade Technical Data Sheet

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A3

Appendix3

Treads


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Appendix3

Treads

A3

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


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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Appendix3

Treads

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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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Treads

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19

Riserthi

ckness

270

Going

180

rise

Nominal

32

Tread

thickn

ess


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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Appendix3

Treads

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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


MDF or ply core

Dress wood19mm "pictureframe" nosing


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


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


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 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


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 bottom veneerfor stairs with visible underside

MDF orply core

Rebatednon-slip

strip

180

rise

Nominal

MDF orply core


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


MDF or ply core

270

Going

47

Riser

thickn

ess47

Tread

thickn

ess


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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Treads

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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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Appendix3

Treads

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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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A3 Stair Balustrade Technical Data Sheet

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