| 1. 40x40x3mm RHS fully welded support frames spaced at suitable centres as per the project layout. Frames bolted together and fixed to floor with suitable fixing bolts/screws appropriate for floor construction.
2. 40x40x3mm RSA link sections between each main support frame.
3. 25mm thick far eastern plywood to all treads and risers. Plywood fixed by use of Hilti wing tip countersunk screws. |
|
Dimension A (tread spacing)
Dimension B (rise per row)
Design Criteria
Vertical deck loading -
- Satisfies the requirement of 4.0KN/m² uniformly distributed load, live loading as stated in BS6399.
- Loading capacity 5.0KN/m² in the aisle positions.
Horizontal loading -
- Satisfies the requirement of 0.6KN/m² uniformly distributed load [15% of the vertical loading] as stated in BS6399.
Construction
40 x 40 x 3.2 mm RHS section fully welded into supporting frames complete with baseplates 125 x 125 x 6.0 mm.
Supporting frames spaced at a maximum of 1200mm centres and linked laterally below deck level with 2Nº sections of 40 x 40 x 4 mm RHS. Support frames provided with diagonal bracing as required by structural calculations.
Decking All treads and risers finished with 25mm thick plywood securely fixed to supporting framework with TEK screws applied in accordance with the manufacturer's instructions. |
