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Thread: Wood trusses 3 feet of center
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04-26-2012, 10:47 AM #1
Wood trusses 3 feet of center
I inspected a metal building (garage) that had the roof trusses 3 ft on center. The roof was metal as well. The framing was basically a pole-barn. I have not inspected a lot of steel buildings, but don't recall ever seeing roof trusses spaced so far apart. Does anyone have any experience with these? Is 3 ft on center ok?
Thanks!
Similar Threads:Last edited by Todd Tuvell; 04-26-2012 at 03:04 PM.
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04-26-2012, 11:10 AM #2
Re: Wood trusses 3 feet of center
Looks like a typical installation to me.
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04-26-2012, 12:14 PM #3
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04-26-2012, 01:24 PM #4
Re: Wood trusses 3 feet of center
"Baseball is like church. Many attend but few understand." Leo Durocher
Bruce Breedlove
www.avaloninspection.com
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04-26-2012, 03:09 PM #5
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04-26-2012, 03:24 PM #6
Re: Wood trusses 3 feet of center
Trusses 3 feet on center 'could' work if the trusses were engineered for it and the roof sheathing was rated for it ... 'could' ... but not likely.
More likely is that they did not order enough trusses or decided to build the garage larger after ordering the trusses and said 'Git R Done' ... and did.
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04-26-2012, 03:29 PM #7
Re: Wood trusses 3 feet of center
Pole Barn Construction Guide
http://www.google.ca/url?sa=t&rct=j&...JRIufrr3SP3qMQ
Last page shows 4' oc for trusses.
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04-26-2012, 04:19 PM #8
Re: Wood trusses 3 feet of center
The trusses could have any spacing desired. The pole buildings I erected had 10 foot on center spacing. Pole barn materials are typically sold as a n engineered package. I suspect 3 ft OC was selected because the steel panels are 3ft and the material packages are sold in 3 ft increments to maximize material usage.
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04-26-2012, 04:59 PM #9
Re: Wood trusses 3 feet of center
That is what I said - as long as the trusses were engineered for that spacing, the installers is not allowed to just install the trusses at any spacing they desire.
The pole buildings I erected had 10 foot on center spacing. Pole barn materials are typically sold as a n engineered package. I suspect 3 ft OC was selected because the steel panels are 3ft and the material packages are sold in 3 ft increments to maximize material usage.
But I stand by the first part in bold.
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04-26-2012, 05:23 PM #10
Re: Wood trusses 3 feet of center
Todd
Given that you do not have the information available to ascertain if the spacing is within specifications its any ones guess as to whether its acceptable.
However just from my experience I can tell you its common to see this type of construction and spacing for utility buildings.
If this is a concern then it might be wise to throw it back on your client to seek further information from the vendor prior to close of title.
Last edited by Raymond Wand; 04-26-2012 at 05:52 PM.
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04-26-2012, 05:37 PM #11
Re: Wood trusses 3 feet of center
The trusses could have any spacing desired. The pole buildings I erected had 10 foot on center spacing. Pole barn materials are typically sold as a n engineered package. I suspect 3 ft OC was selected because the steel panels are 3ft and the material packages are sold in 3 ft increments to maximize material usage.
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04-26-2012, 05:44 PM #12
Re: Wood trusses 3 feet of center
The picture looks like a common Morton garage building. Engineered as a unit, with trusses designed at the factory for the loading conditions and spacing used.
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04-26-2012, 08:34 PM #13
Re: Wood trusses 3 feet of center
They are using horizontal 2 X 4 strapping to distribute the load, and they don't expect big snow loads.
John Kogel, RHI, BC HI Lic #47455
www.allsafehome.ca
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