Hidden Post and Beam Connector Plate


This post and beam connector plate detail shows how to use an Alumini Hidden Connector to join a timbered beam to a post.  The connector is a piece of anodized aluminum in the shape of a “T”, in which one end gets screwed (in the case of this detail) with included Rothoblass HBS screws to the post, and the other end goes into a slot cut into the end of the beam.  The beam is then secured to the connector with ½” aluminum pins or self-drilling screws.


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4 thoughts on “Hidden Post and Beam Connector Plate”

  1. I think bolts (screws) have greater tensile strength than they have shear strength. I’m no engineer but couldn’t the T be ‘let-in’ to the post deep enough that the edge of the bracket and a small portion of the beam transfer load onto a horizontal face of post?

  2. Yes, you can certainly use a housing, letting in the beams into a post, which would allow the beam to bear directly on the post and use the T Rex connector to hold everything together.

  3. I have an issue. I added a 12×12 Douglas fir post to an existing porch corner. Two 3 ply 2×10 headers intersect on top of this new post which support the existing porch roof. My dilemma is that I’m adding a 16x28ft deck on the side of the existing porch with a timber framed roof over it and I’m needing to add a load bearing beam to this new corner post which I just added. This beam will be what goes to my outside corner post 16ft out which will help carry the roof trusses. I’m using 12×12 Douglas fir for the entire project. I’m thinking my best bet would be to use a custom joist hanger that will be fastened to the triple 2×10 header that rests on the new corner post. The joist hanger would be made out of 1/2″ steel with the mounting plate being 12×12 and the part that supports the load extruding 6″ around 3 sides of the beam and bolted through. I may add a knee brace to these posts to increase the beam load capacity if that is needed.

    In your professional opinion do you think that this would be sufficient or would you recommend something different? Thanks!!

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