Design Element: A3 - Treads

Page 1

Appendix 3 – Treads

A3

design elements


Appendix 3 – Treads

design This is a reference guide to standard treads used in the Arden Elements range. Many custom staircases will demand their own unique tread design. Also, new developments in architectural flooring materials and slip-resistant strips naturally ensure that tread specifications are in a continual state of evolution. This appendix can be used in conjunction with other Arden technical data sheets to aid in the specification process. Most tread designs listed here are specified to work with other Arden staircase or stringer elements. It is our hope that it may be used by architects to help with preliminary tread specification early in the design process. As with all aspects of staircase design, tread specifications may need to be altered to meet site-specific requirements.

Gap between treads must not excede 125mm

A3

R6

Go T re

2

www.arden.net.au

in g

25

w id ad

0

th

28

0

Tread thickness 42

Solid timber tread

Nominal rise 165

STT-1


STT-2

Nominal Rise 160

Solid timber tread with non-slip strip

R6

P3 SST-3a.ipt

Go T

in g

d rea

27

w id

Tread thickness 42

Rebated non-slip strip

5

th

30

0

STT-3

19

32

End of nosing bevilled to tread for open edged stair design.

60

Rebated non-slip strip

T re

ad

wi

30 d th

P4 SSTR-1.ipt

0

STTR-1

R6

Expressed Joint

0

Nominal rise 180

27

Solid timber tread with riser board

A3

in g

Solid timber tread with non-slip strip and applied nosing with bevelled ends for mono-stringer application

120

Nominal rise 180

Applied nosing bonded to treads. This reduces tread to tread gap to less than 125mm.

Go

Appendix 3 – Treads

G Gap between treads must not excede 125mm

T re

th i er R is

ck n

ess

19

th i ad

ckn

e ss

32

A

design elements

3


Appendix 3 – Treads

technical Several standard solid timber tread (STT) specifications are shown, some incorporating slip-resistant strips and/or applied nosings. Solid timber treads with risers (STTR) also show options for either vertical or raked riser boards. Laminated timber treads (LTT) involve a composite construction and may be selected for greater thickness or stability. Alternatively they may be required due to the specification of rubber or vinyl on the top surface, and/or to allow for the incorporation of structural steel supports that are fixed to stringers. Some of these designs incorporate applied edge trim as well as nosings. Laminated timber treads with risers (LTTR) may be designed with the bottom faces of the treads to be visual or non-visual. The stack block tread (SBT) is a special design that represents a method of cladding a stringer in order to create an illusion of stacked blocks. The diagrams showing reconstituted stone treads (RST) and ceramic tile covered treads (CTT) illustrate typical ways of approaching this kind of floor surface on treads.

STTR-2

Expressed Joint

Solid timber tread with riser board and non-slip strip over nosing Go

in g

27

0

Nominal rise 180

A3 Ri

th i ser

ck n

ess

19

ad Tre ess ck n th i 32

Rebated non-slip strip overlaps nose to reduce wear. Strip also conceals screw heads.

4

www.arden.net.au


Solid timber tread with riser board and non-slip strip back from nosing

in g

27

0

Nominal rise 180

Go

R is

er

ck th i

ne

ss

19

P7 SSTR-4.iam

ad Tre ess ck n th i 32

Appendix 3 – Treads

STTR-3

Rebated non-slip strip

STTR-4 Expressed Joint

Solid timber tread with raked riser board

Raked riser .0 °

Nom inal rise 180

84

Go

in g

27

0

P8 SSTR-5.ipt

ad T ren e ss ic k T h 32 s r se es R i ick n h T 19

Rebated non-slip strip overlaps nose to reduce wear. Strip also conceals screw heads.

STTR-5

27

0

g s in s No knes c th i 19

Tread thickness 32

in g

A3

Go

Nom inal rise 180

Shown with return nosing for exposed edge

Solid timber tread with riser board and applied nosing

g s in N o th p de 42

er s R is k n e s c th i 19

design elements

5


Laminated timber tread

Dress wood 19mm "picture frame" nosing Dress wood veneer top and bottom

Nominal rise 173

Appendix 3 – Treads

LTT-1

ad Tre ess ck n th i 5 3

Go Tre

LTT-2 Laminated timber tread with non-slip strip and resilient insert

in g

27

w id ad

5

th

30

0

MDF or ply core

Resilient insert for high traffic stairs Rebated non-slip strip Dress wood 19mm "picture frame" nosing Nominal rise 170

ad T re e ss n k c th i 53

Ov

in g Go 0 5 2

e rl

ap

30

Dress wood veneer top and bottom MDF or ply core

LTT-3 3 piece tread is assembled around steel tread plate

Tread thickness 62

A3

Nominal Rise 180

Laminated timber tread with embedded support plate

Go T re

6

www.arden.net.au

in g

27

w ad

0

h id t

30

0

Full width steel support plate connects to stringers on each side


Laminated timber tread with embedded support plate and non-slip strip Nominal rise 180

3 piece tread is assembled around steel tread plate

P 10 LTT-2a.ipt

O

Go

in g

27

0

P 13 LTT-5.iam

d rea s 0T n e s p 3h ick a l r t 62 ve

Appendix 3 – Treads

LTT-4

Full width steel support plate connects to stringers on each side

Rebated non-slip strip

LTT-5

Dress wood 19mm "picture frame" nosing

Laminated timber tread with embedded SHS supports

Nominal rise 180

Dress wood veneer top and bottom

Tread thickness 67

P 14 LTT-6.ipt

Go

in g T

27

d re a

0 w id

th

36

0

MDF or ply core

40mm SHS supports strengthen tread and attach to stringer

LTT-6

Dress wood nosing bonded to core

Laminated timber tread with non-slip strip folded tread plate and full width resilient insert

Resilient insert for high traffic stairs Non-slip strip

R

Nominal rise 180

A3

ess ckn 5 t h i a ir 7 l ua st V is t o f n fr o

Go

in g

27

0

MDF or ply core

Folded steel tread plate typically welded to steel stringer at sides

design elements

7


Laminated timber tread

Dress wood end capping for exposed edge stair

Nominal rise 180

Appendix 3 – Treads

LTT-1

Dress wood top veneer and riser Go

in g

27

0

MDF or ply core

R6

ad T re e ss kn c i th 62

er R is e s s kn c i th 6 2

Dress wood bottom veneer for stairs with visible underside

LTTR-2 LTT-2 Laminated timber tread with riser boards visual soffit with non-slip strip

Dress wood end capping for exposed edge stair

Rebated non-slip strip

Nominal rise 180

Dress wood top veneer and riser

Go

in g

27

0

MDF or ply core

ad T re e ss kn c i th 6 2

er R is e s s ckn th i 6 2

Dress wood bottom veneer for stairs with visible underside

LTTR-3 Laminated timber tread with riser boards non-visual soffit

Dress wood top veneer and riser

A3

Go

in g

27

0

Nominal rise 180

R6

ad Tre ess ck n th i 4 7 er R is e s s ck n th i 47

MDF or ply core

8

www.arden.net.au


in g

Nominal rise 180

Go

Laminated timber tread with embedded support plate and non-slip strip

0 27

er R is e s s ck n th i 47

P 19 SBTT-1.ipt

ad T re e ss kn c i th 4 7

Appendix 3 – Treads

LTTR-4 Dress wood top veneer and riser

Rebated non-slip strip MDF or ply core

SBTT-1

Rebated non-slip strip

Stack block tread interior

Nominal rise 180

18

Going 270

Steel stringer with tread & soffit support plates. 13

P 20 SBTT-1.ipt

Soffit, treads and side returns completely enclose stringer

SBTT-2 Stack block tread exterior 27

0

170

10 Nom inal rise 180

in g

A3

10

Go

Rebated non-slip strip

Shadow lines on returns and riser boards visually seperate treads to create "Stack Block" appearance

design elements

9


AF

Reconstituted stone tread welded steel support

Reconstituted stone tread

Go

27

0

w id

th

in g

65

115

Nominal rise 180

Non-slip ribs

20

Appendix 3 – Treads

RST-1

40

T

d re a

30

0

Welded steel support plate

RST-2 Reconstituted stone tread reinforced concrete support

1.2mm zinc annealed steel snap cover soffit. Powder coated to customer requirements

Go

in g

27

0

40

94

Nominal rise 180

Reconstituted stone tread

Reinforced Rebar concrete Non-slip ribs Folded steel trough contains the reinforced concrete

CTT-1 Ceramic tile covered tread reinforced concrete support Go

in g

27

0

A3

Grout

Nominal rise 180

Ceramic Tiles

Reinforced Rebar concrete Non-slip strip Folded steel trough powder coated to suit

10

www.arden.net.au


Intellectual property is copyright Š Archstairs Pty Ltd unless otherwise agreed in writing. All rights to the document are retained. Any use of the document by clients or third parties, unless specifically authorised by Archstairs Pty Ltd, are at their own risk and the user releases and indemnifies Archstairs Pty Ltd from and against all loss or damage arising from such use.

Appendix 3 – Treads

About this document

compliance Arden is a BSA licensed contractor for carpentry, joinery, glass, glazing and aluminium as well as structural metal fabrication and erection. Arden supplies a Form 16 (Licensed Contractor) on all projects. In design and construct contracts, a Form 15 (Design Engineer) certification is supplied upon request. Please see specific product technical data sheets to check level of compliance with relevant codes and standards.

A3

design note For all commercial applications, it is important that sufficient space for the stairwell cavity be allowed to satisfy Australian Standards and BCA requirements. The footprint is primarily driven by the floor to floor rise, as well as the staircase configuration chosen. However, stringer and balustrade style design may increase the amount of space required. Allowing too small a cavity can restrict the design options of 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 issues can be addressed in a cost-effective manner.

design elements

11


www.arden.net.au

phone (07) 3267 6100 | fax (07) 3267 6500 | email admin@arden.net.au Office & factory: 46 Radley Street Virginia Qld 4014 Australia

Postal address: PO Box 317 Virginia Qld 4014 Australia Version 1.0. Design by www.cazazz.com


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.