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RE: WOOD: Bolt Spec for Wood Fasteners

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Bill,

I’m not sure what your intention is (sill plate connection into concrete, wood to steel, or simply wood to wood connections). In most cases the calculation you seek is probably based on the weakest material – wood. So if you can be more specific we might be able to find a code section to help you design the connection. Typically, I use an A307 or SAE 1018 threaded rod (these are the same from what I have always assumed). Let us know the type of connection you are designing.

 

Dennis

 

Dennis S. Wish, PE

California Professional Engineer

Structural Engineering Consultant

dennis.wish(--nospam--at)verizon.net

http://www.structuralist.net

 

"Apathy is Lethal!" Speak out and Vote - but make sure you getthe facts right without the spin from either side; Verify their claims at FactCheck.Org; http://www.factcheck.org

 

-----Original Message-----
From: Bill Polhemus [mailto:bill(--nospam--at)polhemus.cc]
Sent: Monday, October 18, 2004 7:39 AM
To: seaint(--nospam--at)seaint.org
Subject: WOOD: Bolt Spec for Wood Fasteners

 

Greetings, all.

 

In considering bolted connections in wood, I note that 1997 NDS calls for “ASTM/ASME B 18.2.1-1981”. However, if memory serves that is simply a “dimension spec” describing diameters, thread pitches and thread lengths.

 

In any event I cannot seem to find a recommendation as to bolt strength. The Faherty/Williamson “Wood Engineering and Construction Handbook” states (on page 5.58) “…the use of a high-strength bolt may or may not increase the allowable design value”. I assume they refer to e.g. A 325.

 

My own assumption would be A 307, but as I say I cannot find any reference to this—and there don’t seem to be any design examples in Faherty to guide me.

 

Comments, please.


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