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Mark and Trim Joist Ends

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Frame an 8x12 shed: Intermediate lesson!

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What happens here

After securing the joists, precisely measure and mark the joist lengths. For an 8-foot wide shed, the joist length should account for the rim joists (3 inches total) and the thickness of the sheathing (1 inch total), resulting in a 92-inch joist length. Use a tape measure to define this length on the joists. Then, pull a chalk line across the marked ends of all joists to create a straight cutting guide. Using a circular saw, carefully cut off the excess material to ensure all joists are uniform in length, providing a clean and square edge for the sheathing.

Goal: Ensure joists are uniformly sized and square for sheathing installation

Tools and materials

  • Chalk Line — Creating a straight cutting guide
  • Circular Saw Makita — Cutting excess joist material
  • Tape Measure — Marking joist lengths

What they say

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use only galvanized nails for pressure-treated wood. You can take your layout right here at 16 inches center and then make all your marks. So that when you nail them, it's quite easy. Mark the length of your joist and make sure it is the correct size. Depending on your building, you'll probably want to keep it a little less than 8 feet. You can then draw lines through the squares and cut them out so they are the same size. I've kept the framing an inch shorter so there's room for sheathing on both sides. So, the actual size is exactly 8x12 feet. For this, two nails are sufficient at each connection. You can even put three if you want.

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