I am looking for a way to use a 4x4 base to carry two joined 2x4s as in the picture below.

The problem is that there is a 0.5 in. gap as the actual width of the two boards is 1.5+1.5 = 3 in. while the base width is 3.5 in.

I see someone used a pad to fill in the gap as shown in the picture below. Any idea what kind of pad to use to fill in that gap? Thanks! enter image description here

This is the base: enter image description here

  • 5
    To what end? Why? What function will the two 2 x 4’s be performing? The “pad” in the photo is probably just a piece of half-inch plywood.
    – Alaska Man
    Jul 13, 2018 at 8:47
  • The "end" is keeping the beam stable in the base. Is this not obvious? Doesn't really matter what the beam is for.
    – isherwood
    Jul 13, 2018 at 19:01
  • isherwood. to what end is a phrase meaning "for what purpose" definitions.net/definition/to%20what%20end How or what is the two 2x4 used may have a bearing ( pun intended ) on how to answer the question.
    – Alaska Man
    Jul 14, 2018 at 0:37

1 Answer 1


I'd normally use whatever material the beam is compose of. In this case, you probably have some treated lumber scraps. There you go.

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