roof hook spacings?

[sunspark]

Does anybody know where i can get the roof hook maximun spacing distances for schletter roof hooks and mounting rail from?

Cheers

 

[Worcester]

Your structural engineer will do that - the one that you are using to do the dead and live load and wind load analysis.

 

[Graeme Harrold]

Try looking at the installation manuals or contact your supplier. This will be derived from your wind/snow load calcs, which you can work out yourself. Your structural engineer will then tell you if the actual roof is up to it or not!