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Fitted bolt connections in truss fabrication

Fitted bolt connections in truss fabrication

Fitted bolt connections in truss fabrication

(OP)
The fabricator wants to use bolted connections on a truss. There are a few connections where slip critical connections will not work i.e. we will need a lot of bolts. So I am trying to see if I can use a fitted bolt connection for these connections. We are using 3/4" diameter A325X bolts. What size of hole is required to ensure a fitted bolt connection? Is this addressed in the Steel Manual or any other reference text?

RE: Fitted bolt connections in truss fabrication

I would start with the NDS.  They have an entire section on bolting and dowel bearing strength, etc.  It is availble from the AFPA.  In general, bolt holes should be 1/32"-1/16" larger than the bolt diameter (Section 11.1.2)
Scott
www.dbssinc.com

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