Decks, ramps and stairs with enclosed subfloor space
Jump to Decks, ramps and stairs with unenclosed subfloor space
| Building Element | BAL-12.5 and BAL-19 | BAL-29 | BAL-40 | BAL-FZ3 |
|---|---|---|---|---|
| Wall enclosing subfloor space | Less than 400mm from the ground or an external horizontal surface1 use ALLseasons/hySPAN (H3) framing clad with non-combustible material such as 6mm fibre-cement sheet Above 400mm, use SHADOWclad or ECOply | ALLseasons/hySPAN (H3) framing provided the framing is sarked on the outside and clad with non-combustible material such as 6mm fibre-cement sheet | ALLseasons/hySPAN (H3) framing provided the framing is sarked on the outside and clad with non-combustible material such as 9mm fibre-cement sheet | FRL 30/30/30 Refer to External Fire Rated Walls or 90mm brick skin |
| Subfloor supports (posts, stumps, columns, stair stringers etc) | ALLseasons (H4) (H3 when not in ground contact) | |||
| Deck/ramp bearers and joists | ALLseasons/hySPAN (H3) | |||
| Decking and Stair treads | ALLseasons (H3) except in those areas of the deck less than 300 mm (measured horizontally at deck level) from glazed elements that are less than 400 mm (measured vertically) from the surface of the deck | Bushfire – resisting timber such as Blackbutt2 | Use non-combustible materials such as steel or concrete | Use non-combustible materials such as steel or concrete |
| Balustrades and Handrails | ALLseasons (H3 | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall |
1 An external horizontal surface or a ledge includes decks, carport roofs, awnings and similar elements or fittings having an angle less than 18 degrees to the horizontal and extending more than 110 mm in width from the wall or window or door
2 Bushfire - resisting timbers include Blackbutt, Merbau and Red Ironbark, River Red Gum, Silver top Ash and Turpentine.
3 NSW requirements do not recognize BAL-FZ construction solutions from AS3959 2009. A BCA Alternative Solution is required for BAL-FZ construction in NSW.
Decks, ramps and stairs with unenclosed subfloor space
Jump to Decks, ramps and stairs with enclosed subfloor space
| Building Element | BAL-12.5 and BAL-19 | BAL-29 | BAL-40 | BAL-FZ1 |
|---|---|---|---|---|
| Wall enclosing subfloor space |
N/A Subfloor space is open |
N/A Subfloor space is open |
N/A Subfloor space is open |
N/A Subfloor space is open |
| Subfloor supports (posts, stumps, columns, stair stringers etc) |
ALLseasons (H4) NSW requires Bushfire resisting timbers |
Bushfire-resisting timbers | Metal or Brick | Metal or Brick |
| Deck/ramp bearers and joists |
ALLseasons/hySPAN (H3) NSW requires Bushfire resisting timbers |
Bushfire-resisting timbers | Metal | Metal |
| Decking and Stair treads |
ALLseasons (H3) except in those areas of the deck less than 300mm (measured horizontally at deck level) from glazed elements that are less than 400mm (measured vertically) from the surface of the deck NSW requires Bushfire resisting timbers |
Bushfire-resisting timbers | Tile or concrete decking | Tiled or concrete decks |
| Balustrades and Handrails | ALLseasons (H3) except in NSW, for those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall use bushfire resisting timbers | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall | ALLseasons (H3) except those parts of the handrails and balustrades less than 125 mm from any glazing or combustible wall |
1 NSW requirements do not recognize BAL-FZ construction solutions from AS3959 2009. A BCA Alternative Solution is required for BAL-FZ construction in NSW.
July 2010 (2)
