Structural Floor Panels Design Guide - Hebel Supercrete AAC ...

5.0 Stairs
Stairs can be made from either standard Supercrete Stair
Treads, or cut down Structural Floor or Stair Panels.
Supercrete Stair Treads come in standard sizes of 1000
x 300 x 175mm or 1200 x 300 x 175mm. These can be
used to make ‘common’ or ‘accessible’ stairs as shown in
Detail SFP 5-1, below. Supercrete nosing and back
support will need to be adhered to the stair treads in these
situations. These are cut from Supercrete Blocks.
For longer stairs, Stair Panels come in 6000 x 600 x150mm,
or 6000 x 600 x175mm, which can be cut to size. Where
higher riser dimensions are needed, such as for ‘service’ or
Where a stair support wall has a control joint in
it, the affected tread is not bonded to the adjacent
tread, to allow movement to occur.
Site cut 25mm
angled
Supercrete
nosing block
300 x 175mm
Supercrete
Stair Tread
34°
Common Stairway (37°max)
220 (min)
80 Site cut 80 x 20 Supercrete
packer or thick bed mortar if
45° required
39°
220 (max)
Service Stairway (47° max)
‘secondary’ stairways, Supercrete Floor Panels may be
specially designed and cut to suit.
All treads shall have a minimum of 50mm bearing on each
end, on support walls or beams. The front edge of the
panels shall overlay and be supported on 50mm minimum
of the tread below (and backing block if required).
Where the required riser height is greater than the
tread height, the gap between treads shall be packed
with Supercrete AAC packers or mortar to provide
continuous bearing.
For more information on Supercrete Stairs refer to
www.supercrete.co.nz.
Pitch line
280 (min)
25mm angled
Supercrete
nosing block
Pitch line
310 (min)
Pitch line
45
300
175
190(max)
Site cut 50 x 100
Supercrete back support
Treads or panels can form landings.
Pitch, Riser and Treads for Supercrete Stair Treads to meet the NZ Building Code
Detail no. SFP 5-1
300 x 175mm
Supercrete
Stair Tread
Accessible Stairway (32°max)
Secondary Stairway (41° max)
SFP 2012 50 Copyright © Supercrete Limited 2008
34°
200mm
Supercrete
Structural Floor
Panel cut in half
Pitch line
250
15
50
300
175
180(max)
Site cut 50 x 100
Supercrete
back support
200
200mm
Supercrete Structural
Floor Panel cut in half