Replies

1. 
   MikeHennessy | Oct 17, 2007 07:18pm | #1

   I have no idea what the answer to your question is, but I just wanted to point out that a sheet metal screw is different from a wood screw. You might want to specify which you are referring to.

   Mike Hennessy
   Pittsburgh, PA

1. 
   ToddSliver | Oct 17, 2007 08:39pm | #2

   Many people refer to a screw that is not used with a nut as a wood screw. We do not use the old tapered wood screw. We use a sheet metal screw or a 2/3 LO root screw. Thanks Todd

2. 
   SteveSchoene | Oct 17, 2007 09:14pm | #3

   The starting place for finding the info probably should be the U.S. Forest Product Laboratory (FPL).  Their wood handbooks covers fasteners, though perhaps not the specific screw you have in mind.  The url takes you to the appropriate chapter.

   http://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr113/ch07.pdf

   There may be other published research that you could uncover by searching the FPL site. 

1. 
   ToddSliver | Oct 17, 2007 09:29pm | #4

   Steve, thank you for your help. Todd

3. 
   Routerman | Oct 17, 2007 09:37pm | #5

   ~pull srength in dry maple & oak/1/2" penetration in face grain = 500 pounds. (Eckleman's "Strength design of Furniture)

    

   MDF, PB, ply etc dependent on many variables, tho expect ~ <100 pounds/3/4" penetration. (Hi value plies like marine or hardwood birch, expect much more.)

    

   Routers