The minimum width of the stair treads shall be ….. mm and with minimum of ….. mm risers to a maximum of ….. risers?
250, 170 , 200 mm
150, 120 , 150 mm
300, 400, 450 mm
None of the above
What is the minimum headspace above a stair case measured vertically from the pitch line to the ceiling?
1,5 meters measure vertically from the pitch line
2,1 meters measure vertically from the pitch line
2,5 meters measure vertically from the pitch line
3,0 meters measure vertically from the pitch line
What is the importance of a DPC?
To prevent mist & fog into the house?
To allow moisture penetration
To prevent rising dam through walls
All of the above
A strip of approved DPC sheeting 150 mm wide should be placed length wise under the ridge tiles, over lapping the top course of tiling on each side by 25 mm. Lapped ends must be supported underneath and the overlap should not be less than……?