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#1
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Rafter size
Hello,
I'm building a picnic pavilion and was trying to figure out what size rafters I need. I'm trying to get away with 2X4's 24" OTC. The building is 10'X16' so the span is 5' on each side. There will be an overhang of about 2 feet. So the rafter needs to be 7 feet but for calculations it is only 5 feet (ridge board to top sill plate). Can I get away with 2X4's? I'm in southwestern PA, zone 5. Here's the stats for my area: Code: BOCA 1999 Wind: 80 Ground Snow: 25 Live Load:20 *Roof Snow:18 Exposu B Acceleration Coefficient (Aa):0.05 *Roof Snow is a calculation based on the Ground Snow. Thanks, Sam Hopkins |
#2
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#3
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A rafter will only be 7 feet long with a 5' span and a 2' overhang if it is
a flat roof. Any slope will add to the length. "Sam Hopkins" wrote in message om... Hello, I'm building a picnic pavilion and was trying to figure out what size rafters I need. I'm trying to get away with 2X4's 24" OTC. The building is 10'X16' so the span is 5' on each side. There will be an overhang of about 2 feet. So the rafter needs to be 7 feet but for calculations it is only 5 feet (ridge board to top sill plate). Can I get away with 2X4's? I'm in southwestern PA, zone 5. Here's the stats for my area: Code: BOCA 1999 Wind: 80 Ground Snow: 25 Live Load:20 *Roof Snow:18 Exposu B Acceleration Coefficient (Aa):0.05 *Roof Snow is a calculation based on the Ground Snow. Thanks, Sam Hopkins |
#6
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On Fri, 8 Oct 2004 21:19:28 -0400, someone wrote:
A rafter will only be 7 feet long with a 5' span and a 2' overhang if it is a flat roof. Any slope will add to the length. He'll be buying 8 foot anyway, I presume. -v. |
#7
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#8
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On 10 Oct 2004 07:01:34 -0700, someone wrote:
... buys at a real lumber yard where they will cut them for him.... ?? I think of a "home center" as someplace that cuts boards for customers, and a "real lumber yard" as someplace that sells stock sizes to contractors who have their own saws and cut their own lengths! -v. |
#9
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#10
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On 12 Oct 2004 06:29:00 -0700, someone wrote:
Wrong. I have never seen a 'real' lumberyard that didn't cater heavily to homeowners/handymen. Eveyone I do business with is more than happy to cut to size for me. Oh, my local lumberyard has a sign on the wall "cuts $1 ea."; they'll do it. But as I stand at the counter, I see that the overwhelming majority of the quantities sold are stock lengths - often full bundles or pallets - that the users will cut themselves. My personal observation is that most customers of real lumber yards do NOT have their wood cut for them, even though the yards will do it for the occasional customer who asks for it. I don't recall ever having a lumber yard cut a board or even a panel for me, though its been a lot of years, maybe I did sometime way back whenever. -v. |
#11
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