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- Subject: [SEAOC] FW: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re:
- From: croser(--nospam--at)s6.hninc.com
- Date: Thu, 30 May 1996 7:33:37 -0800
---------- From: Crosier, Jeffrey To: terry2(--nospam--at)cdepot.net (Terry Weath Subject: RE: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEA Date: Wednesday, May 29, 1996 10:39AM Terry, >From what I know, the L.A. City reduction is now 25% based on their memo of May 20, 1994 and subsequently appended. Prior to that, they required a 20% reduction which was effective Nov. 7, 1992 unless you called for special inspection, then and only then could you use the common nail values. The 20% reduction is based on the allowable values in UBC table 23-I-G (formerly 25-G) for box nails compared with common nails. You could work your own values which should coincide with the UBC values by following the procedures in APA research report 105. I don't know where the 15% Dennis mentions comes from, that figure could possibly be a mistake. If anyone knows for sure, it would be good to know. My feeling is that the 20% reduction was not based on testing, only on calculations but I don't know for sure. Jeff Crosier, S.E. ---------- From: terry2(--nospam--at)cdepot.net (Terry Weath To: seaoc(--nospam--at)power.net; Chung-Yuan Wen; Jeffrey Crosier Subject: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEA Date: Thursday, May 30, 1996 7:19AM >Dennis Wish wrote: >As far as I know, SEAOSC has done studies for the difference in shear >walls nailed with sinkers verses common nails. L.A. City has called for >a degradation of 15% off the rated shear where sinkers are used in lieu >of common nails. >I know that there is still some controversy over this issue. >I also agree with Ray that the major problem with power driven nails is >the damage to the ply layers. The advantages that I read about power >driven nails is the advantage of the hot glue that creates a better bond >with the wood for resistance to nail withdrawl. I have heard the same thing: that the covering (green vinyl?) creates a "glue" which bonds to the sheathing creating shear values comperable to normal. What did LA City base their 15% reduction on? Testing? - Terry .. * * This email was sent to you via Structural Engineers Association of * California (SEAOC) email server. To subscribe (no fee) to the list, send * email to seaoc(--nospam--at)seaoc.org and in the subject of the message type * subscribe. To Unsubscribe, send email to seaoc(--nospam--at)seaoc.org and in * the subject of the message type Unsubscribe. For questions, send email * to seaoc-ad(--nospam--at)seaoc.org. Make sure you visit our web site at: * http://www.seaoc.org/seaoc * ...
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