I'm building an awning along the side of a barn. The outside cross beam is two separate sections that butt over the center post. The post is a 6x6. I'm wondering if I can use 4 through bolts (two in each beam) and if so what size.

I'm concerned about being too close to the ends of the beam and edges of the post as there is only 3'' of each beam resting on the post. I've used (2) 3/4'' bolts on all the other post/beam connections. Can/should I size these down for the post that has both sections of beam resting on it?


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enter image description here edit: added photo

  • 3
    A simple sketch would help us understand better. For example, when you say "end of the beam", do you mean the top end, the 6"x6" cross section? Or do you mean the edge (near the long side) of the beam?
    – SteveSh
    Mar 18 at 11:49
  • 2
    Also, bolting beams to posts is not recommended for things like decks. But an awning that may be OK.
    – SteveSh
    Mar 18 at 11:50
  • +1 to the request for a sketch. Please show overall dimensions and sizes of all framing members. Mar 18 at 13:16
  • This can't be answered definitively without a sketch or photo. But you might want to avoid butt joints on crossbeam segments for strength.
    – gnicko
    Mar 18 at 13:49
  • 1
    Is this a mortise and tenon joint? Otherwise it's not clear what the bolts are doing.
    – Mark
    Mar 20 at 15:10


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