Quick math problem for you guys.

[jamesA]

It's been too long since I've use any real math. I need some help in finding the surface area of my roof.

It's 24 ft wide by 48 ft long with a 42 degree roof. My uncle just stopped by and said he'd do it if he had help, but he can't, and I need to replace 4 of the 6 trusses holding the roof up, then add at least 5 more because the 8 ft spans are too far apart to properly support any snow weight. Which is why the roof is caving in.

Anyway, I'm not good at this.

 

[E_SolSi]

based on an 1152 sqft base area
and an 11 pitch roof
you are looking at about 1563sqft

http://www.calculator.net/roofing-c...&acareaunit=foot&roofpitch=11&tp=ar&x=70&y=16

 

[jamesA]

Thanks E!

 

[Briansol]

are both the front and back the same pitch? and the beam is dead nuts center? I know my house, the rear pitch is less than the front

 

[jamesA]

I dunno. These are rough estimates on my garage. It was a shitty build on a crappy pullbarn design. Each truss has 8 feet between it.

 

[invisibledemon]

where do you live?

 

[jamesA]

Indiana, that's what they tell me anyway.

 

[awptickes]

Never mind, I see it's a 42 degree roof now.

 

[D16Civic]

That's a big garage.

Are they trusses or rafters? Seems crazy to build something with an 8 ft span between supports. There essentially would be no support for each sheet of roof decking.

 

[jamesA]

That's a big garage.

Are they trusses or rafters? Seems crazy to build something with an 8 ft span between supports. There essentially would be no support for each sheet of roof decking.

Yeah it was built by a mechanic, three car garage.There's a 6 ft deep oil pit on one side even.

There are triangular trusses at 8 foot intervals and then he used 2x4s perpendicular to them to hold the plywood/shingles. The first hole started dead center between two trusses.

 

[awptickes]

There are triangular trusses at 8 foot intervals and then he used 2x4s perpendicular to them to hold the plywood/shingles. The first hole started dead center between two trusses.

That's your problem right there... Not to code to begin with, he probably bought a single truck load of A-Frame supports and had to figure out how to make it work, lol.

 

[jamesA]

Yup. That's the first thing dad and my uncle both said upon walking inside.

 

[invisibledemon]

That far north, I'm surprised it didn't fail the first snow.

 

[jamesA]

Brian left in 2010, it started falling in on itself in a few places before that time.

 

[jamesA]

Just called my insurance and made a claim.

1000 out of pocket > trying to figure out how to pay 10k in supplies and labor.