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Sistering truss base benefits?

Sistering truss base benefits?

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#1

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11-08-22, 06:29 PM

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Doc.Harrison

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Sistering truss base benefits?

Will sistering the truss bases give any structural benefits?

I am placing 1/2 osb down in the attic over the garage.
The truss span 20 plus feet

thank you

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11-09-22, 12:35 AM

Marq1

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Assuming for storage?

Not really, the truss is an engineered structural member so just adding another piece of wood does not necessary means it is any stronger.

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11-09-22, 06:02 AM

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beelzebob

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My guess is no since the truss joints and members above the truss base also share in supporting any additional weight placed on the base.

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11-09-22, 06:03 AM

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Pilot Dane

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You should not turn a trussed area into storage. Engineered trusses are designed to carry a specific load. Period. Adding storage after the fact is generally a bad idea. If you can locate the documentation for your trusses you can look and see what load factors they used and if there was anything "extra" figured in to allow for storage.

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11-09-22, 07:23 AM

Marq1

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Quote:

Adding storage after the fact is generally a bad idea.

So this question comes up time and time and time again.

Truss's are designed for both live and dead load (think heavy snow) so many people use the area for storage.

I just added a sheet of plywood in my new garage to get some large sheet metal pieces off the floor, maybe 75# across 5 trusses. Considering I was walking on each one individually during construction I'm not too worried but that is my decision.

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Basements, Attics and Crawl Spaces
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