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- Subject: [SEAOC] Re: [SEAOC] RE: [SEAOC] simpson strength values
- From: HARRISENGR(--nospam--at)aol.com
- Date: Sat, 29 Jun 1996 12:26:36 -0400
Hi Shafat. You are correct and that is why the stresses are not adjusted for Cm in the lumber. At a CSES dinner meeting last week Doug Thompson was speaking on lumber and brought up the point that for nails , the moisture content at the time of application, independent of the final moisture content, can require a permanent value reduction. Since this indicated i have been using too high Simpson hanger and strap values, i checked the table on page 2-991 of the UBC and the definition of partially seasoned. I have spoke to people at Simpson and I.C.B.O. who said this is a valid point. This makes sense when i think about a nail in an old board i can look at, like a fence or patio cover. The nails get loose after several years. It is interesting that while the Simpson catalog specifies the values are for dry wood, the actual I.C.B.O. report does not mention wood condition. Tom ...
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