Last Updated 28/07/2004

Sheet Roof - N3(W41N)

Truss Span (m) 6 8 10 12
Truss Spacing (mm) 600 1200 600 1200 600 1200 600 1200
Lintel Span (mm) 1200 Bot 1Y12 1Y12 1Y12 1Y12 1Y12 1Y16 1Y12 1Y16
  Top 1Y12 1Y12 1Y12 1Y12 1Y12 1Y12 1Y12 1Y12
1500 Bot 1Y12 1Y16 1Y12 1Y16 1Y12 1Y20 1Y16 1Y20
  Top 1Y12 1Y12 1Y12 1Y12 1Y12 1Y12 1Y12 1Y16
1800 Bot 1Y12 1Y16 1Y16 1Y20 1Y16 1Y12* 1Y16 1Y16*
  Top 1Y12 1Y12 1Y12 1Y16 1Y12 1Y12* 1Y12 1Y12*
2100 Bot 1Y16 1Y20 1Y16 1Y12* 1Y20 1Y16* 1Y20 1Y16*
  Top 1Y12 1Y16 1Y12 1Y12* 1Y12 1Y12* 1Y12 1Y12*
2400 Bot 1Y16 1Y12* 1Y20 1Y16* 1Y20 1Y16* 1Y12* 1Y16*
  Top 1Y12 1Y12* 1Y12 1Y12* 1Y16 1Y12* 1Y12* 1Y16*
2700 Bot 1Y20 1Y16* 1Y20 1Y16* 1Y12* 1Y20* 1Y16* 1Y20*
  Top 1Y12 1Y12* 1Y16 1Y16* 1Y12* 1Y16* 1Y12* 1Y16*

* Donates 2 bond beams required one on top of the other. Bottom reinforcement of top block and top reinforcement of bottom block to be Y12.