Straining Beam

Straining BeamEvery timber gets its name from where it is in the frame. This beam is between two posts. It holds them apart from the rafters pushing them in.
It is called a “Straining Beam”.

Here is an exploded view of one.

Sometimes they have braces, sometimes they don’t. Usually it has a standard tenon on the end to the post.

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2 Responses to Straining Beam

  1. Vince November 29, 2017 at 12:37 pm #

    Wouldn’t the rafters being trying to force the walls apart, and therefore putting the straining beam in tension, rather than compression?

    • Brice Cochran November 30, 2017 at 8:47 am #

      In some cases you are correct Vince, however, in this gambrel barn frame example, the dynamics are a little because the lower rafters are pushing against the plate and queen posts.

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