Figuring Trusses Load & Spacing

[karoc]

Guys I have been corresponding with truss company and I think I am wearing out my welcome with them.They are very helpful till they find out it may be 6 months before you buy. So with a span of say 32' I want to install OSB decking 1/2 with an underlayment and then install metal over all that. Is there away to figure what the size and spacing should be? I haven't seen it snow here since 60's and there has been couple dusting of snow since but it don't stay around. So I don't believe that snow needs to be figured in, I wish there was a chart or free program available on line to do this so I will quite bugging them. If you should know of a site that has I can fill in blanks that would be great help. I have case of cabin fever in city. Thanks guys sorry for bugging ya'll again about trusses

 

[Hamball44]

Below is a link where you can plug in your address and it will tell you your design wind, snow, etc. loads. You would still need to verify with your locality which version of the building code they follow.

https://hazards.atcouncil.org/#/

 

[casperz]

I used free plans from Midwest plans service about 15 years ago.

Midwest Plan Service

Here is a 32ft truss plan from the page.

We built 30ft 4/12 pitch trusses and used 2x6's for all chords with 3/8" plywood plates set 24in OC. It's held up for 15 years and we get at least one snow of more than 8" a year.

I would not use OSB as a deck under the metal roofing. Over time the OSB degrades around the screws and lets the screws loosen. It's a constant battle to keep the metal on after a while in any kind of wind. Plywood might be a better choice but given the choice I'd just go with a steel building.

 

[rburke65]

Steel building....imo......harder to insulate, build in utopia it, hang fixtures......did I say imo? I think I did......