Simpson Fastener Length

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  #1  
Old 01-17-18, 10:28 AM
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Simpson Fastener Length

My pre-concealment inspection is scheduled for Monday (finally). I've been looking closely at the framing and it appears that 1-1/2" 10d nails were used on a couple of the LUS28 hangers that attach the roof trusses to the gable-end girder truss. Shouldn't these nails be at least 3" long for the carried member connections (the toenails)? BTW, the girder consists of two 1-ply 2x trusses, so it is 3" thick. Is it generally a good idea for the fasteners to penetrate both plies (without piercing the rear face of the second ply)?

I was a little hesitant to post this, but it is much less of a hassle for me to replace these nails if necessary rather than having the builder send one of their laborers out to do it.
 
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Old 01-17-18, 10:43 AM
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Look up the specs for the hanger on simpsons site.
 
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Old 01-17-18, 10:51 AM
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The table says 10d nails for face and flange. No length specified. AFAIK, Simpson 10d nails are available in 1-1/2" and 3". The broader question is, should both the face nails and flange nails penetrate both plies of the girder? This will determine if I need to replace all of the nails or just the flange nails.
 

Last edited by mossman; 01-17-18 at 11:12 AM.
  #4  
Old 01-17-18, 11:34 AM
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I stumbled across a note on the fastener page that says to use minimum 3" long nails when double shear nailing, so that answers the question about the flange nails. However, I haven't been able to find a note explicitly stating the length of the face nails for 2-ply 2x headers. They do specify 1-1/2" face nails for a single 2x header, but with a reduced load of 0.64. If 1-1/2" into a 1-ply 2x header reduces the load to 0.64, then I think it's safe to assume a 2-ply 2x header should get a 3". Only other note I could find is for substituting a 10d 1-1/2 in place of a 10d 3" with a load correction of 0.77. Considering my application is a roof load, it seem like it would be safe to leave the 10d 1-1/2" face nails and only replace the flange/shear nails with 3".
 

Last edited by mossman; 01-17-18 at 12:36 PM.
 

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