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[SEAOC] Incising

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     Dear Mr. Chock,
     
     Your April 2, 1996 e-mail to SEAOC indicated that you 
     were proposing a code amendment for effects on strength 
     of incising on Douglas-Fir and Hem-Fir lumber. Please 
     note that AF&PA is already addressing this issue for 
     the 1996 edition of the National Design Specification 
     (R) for Wood Construction. The proposed new section to 
     the NDS is as follows:
     
     2.3.11-Incising Factor, C_i
     
     Tabulated design values shall be multiplied by the 
     following incising factor, C_i, when structural sawn 
     lumber is incised to increase penetration of 
     preservatives with incisions cut parallel to grain, a 
     maximum depth of 3/4 inch, a maximum length of 3/8", 
     and a maximum density of incisions of 357/ft^2. 
     Incising factors shall be determined by test for 
     incising patterns exceeding these limits.
     
     TABLE 2.3.11-INCISING FACTORS, Ci
     
     Design Value                       C_i
     
     E                                  0.95
     Fb, Ft, Fc                         0.85
     Fv, Fc                             1.00
     
     This proposal is currently being balloted to the 
     AF&PA/ANSI Canvass Committee for the 1996 NDS. Results 
     will be reported sometime in July.
     
     Please contact me if you have further questions.
     
     
     ******************************************************* 
     John "Buddy" Showalter, P.E.
     Manager, Structural Engineering
     American Forest & Paper Association
     American Wood Council
     1111 - 19th Street, NW, Suite 800
     Washington, DC 20036
     P: 202-463-2771
     F: 202-463-2791
     email  Buddy_Showalter(--nospam--at)afandpa.ccmail.compuserve.com 
     Compuserve  ccmail:Buddy Showalter @ afandpa 
     ******************************************************

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