For truss spans of 13m to 16m, the steelbrace shall be in an X-shape configuration over the whole roof with an additional braced bay at each end and intermediate braced bays at maximum 13000mm centres, as shown.

Steelbrace layout for very long roof, spans 13m to 16m

Figure C5-04-05-01

Maximum overall truss spans for steelbrace

Maximum overall truss span, m
WindRoof Pitch
Single braceDouble brace
<15°<15° to 20°<15°15° to 20°20°+ to 30°30°+ to 35°35°+ to 45°
N1-N3, 16.0 16.0 16.0 16.0 16.0 16.0 13.5
N4, C2 15.5 13.0 16.0 16.0 14.5 13.5 N/S
C3 Not suitable Not suitable 16.0 15.5 Not suitable Not suitable Not suitable