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RE: Adding nail values to bolt values

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Joe –


Even though bolts and nails are “dowel type fasteners”, I would hesitate to combine their capacities. After all, holes are drilled for bolts whereas nails are “interference fit” type of fastener. In effect, the nails have to fail before the load is transferred to the bolt. Mixing different diameter of bolts makes more sense, although I wouldn’t do that either.


Sleep well at night or make boss happy? Hmmm….


T. William (Bill) Allen, S.E. (CA #2607)


Consulting Structural Engineers

V (949) 248-8588

F (949) 209-2509


-----Original Message-----
From: Joe Grill [mailto:jgrill(--nospam--at)]
Sent: Tuesday, March 15, 2005 2:32 PM
To: seaint(--nospam--at)
Subject: Adding nail values to bolt values


Can bolt values in a timber connection be added to nail values in the same connection?  I have a connection where existing nailing is not adequate per calculated allowable nail values.  I can add bolts to the connection easier than nails due to the size of side members and a worry about splitting the main member from too many nails but only if the bolt and nail values are addative.


J. Grill


Joseph R. Grill, P.E. (Structural)

Shephard - Wesnitzer, Inc.

Civil Engineering and Surveying

1146 W. Hwy 89A Suite B

Sedona, AZ  86340

PHONE (928) 282-1061

FAX (928) 282-2058