Agriv8 Posted April 1, 2021 Report Share Posted April 1, 2021 So I need to calculate where I need to support a 16mm twin wall polly carb roof that’s going above my decking to keep Mrs Agriv8 happy. I can read the graph but how do I work our what n/m load will be for this ? 5 deg pitch an bolted to house along one side. wander if any of you clever lot can give me a clue thanks Agriv8 Link to doc https://www.edplastics.co.uk/Quinn Polycarbonate multi-wall Technical Manual.pdf Quote Link to comment Share on other sites More sharing options...
WalkedUp Posted April 1, 2021 Report Share Posted April 1, 2021 1.5kN/m2 is domestic loading for the floor of a house Do you require access onto the roof for maintenance? If not and you do not expect heavy snow loads then go for the lightest rating and don’t worry about it. Alternatively have a structural engineer look at Approved Document A for loadings. Quote Link to comment Share on other sites More sharing options...
WalkedUp Posted April 1, 2021 Report Share Posted April 1, 2021 Page 40 refers back to I mposed loads upon roofs specified in BS EN 1991-1- 1:2002 as your roof is below 15°. Quote Link to comment Share on other sites More sharing options...
WalkedUp Posted April 1, 2021 Report Share Posted April 1, 2021 Quote Link to comment Share on other sites More sharing options...
JKD Posted April 2, 2021 Report Share Posted April 2, 2021 I think you're over-thinking this a tad. The length and width of the sheets will determine where and how many cross bracing you'll need. Just Google search "method of fixing polycarbonate roof" and you should find what you're looking for 👍 Quote Link to comment Share on other sites More sharing options...
vampire Posted April 24, 2021 Report Share Posted April 24, 2021 Usually 450 centre max,check manufacturer website.Don't use the £7 sheets from Wic... Quote Link to comment Share on other sites More sharing options...
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