Z & C Purlins

Maximum Support Spacing's (mm) Total Coating Thickness (mm) Type of Span 0.50 0.40 0.45 Roofs Single span 1300 800 950 End Span 1400 1100 1200 Internal Span 2050 1550 1750 Walls Single Span 1900 1200 1700 End Span 2600 1800 2450 Internal Span 2400 2850 3000.Maximum Support Spacing (In millimeters).

The maximum recommended support spacing are based on tests conducted in accordance with AS1562, AS4040.1-1992 and AS4040.2-1992.

Roof spans considered both resistance to wind pressure and light roof traffic (traffic arising from incidental maintenance). Wall spans considered resistance to wind pressure only.