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Roof Wind Load Table

The table below recommends weight series and fixing frequency for Alsynite Glass Reinforced Polyester sheeting to accomodate a nominated internal purlin spacing at a wind load of up to 1 Kpa. For wind loads in excess of 1 Kpa refer to the Alsynite Technical Department for sheet weight and spanning recommendations. Note: For end spans, reduce the span figure by 20%

Series (GSM)	2400	3050	3660	4270	4880	Recommended amount of main fasteners
						Roof, Crest fix		Wall, Pan fix
						Mid span	End span	Mid span	End span
Trimdek (Mono clad)	1500mm	1700mm	2000mm	2200mm	2600mm	5	5	4	4
Custom Orb (Corro)	1200mm	1500mm	1700mm	1750mm	1800mm	4	6	6	6
Spandek 700	1600mm	2000mm	2300mm	2600mm	2800mm	5	5	5	5
Kliplok 406 & 700	1400mm	1700mm	2000mm	2300mm	2700mm	3,4	3,4	3,4	3,4
LT7	1700mm	2100mm	2400mm	2600mm	2800mm	6	6	6	6
Speedek 500/700	1400mm	1700mm	2000mm	2300mm	2700mm	3,4	3,4	3,4	3,4

Fixing Specifications should be in accordance with AS/NZS 1562.3:1996 Plastics Building Sheets - General Installation Requirements and Design of Roofing System.
The sheet weights recommended are designed to withstand the effects of column expansion caused by thermal movement of the entire roof structure and to provide a sheet of the weight and strength necessary to complement the metal roofing specified and the supporting structure.
The drilling of oversize fastener holes is required to allow for thermal expansion and contraction
For sheets up to 10m - drill clearance hole of 10mm dia.
For sheets above 10m - drill clearance hole of 15mm dia.
For roof installations, fasteners must be fixed to the ribs. For wall installation; rib fixing is recommended, however valley fixing can be used in low wind load areas.

Note: Single sheet lengths above 16m are not recommended with the exception of the Free span 700 profile