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Re: Weights for design[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Weights for design
- From: "Paul Feather" <pfeather(--nospam--at)SE-Solutions.net>
- Date: Tue, 8 Mar 2005 12:31:22 -0800
Rigid insulation is on average close to 1 psf per inch, but there is no way roll insulation is anywhere close to 11 psf. Typical roll insulation is .1 to .3 psf per inch depending on type (rock wool, glass wool, or similar). A typical R30 roof with roll insulation would be maybe 1.0 psf additional load.
Sprinkler loads are typically 1.0 to 1.5 psf. The big issue with sprinklers is the location of the main risers / feeds, where two trusses could end up carrying a 4 or 6 inch line.
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