Layout and Install Rim Joists
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What happens here
Snap a chalk line on the sill plate, 1.5 inches back from the outside edge. This line will serve as the guide for the inside face of your rim joists. Next, use a speed square and pencil to mark the specific positions for your interior floor joists along the chalk line, typically at 16-inch or 24-inch intervals on center. Then, set your rim joists onto the sill plate, aligning their inside edge with the chalk line. Secure the rim joists to the sill plate by tacking them down with nails or using a nail gun.
Goal: Define the perimeter of the floor system and mark the locations for all supporting joists.
Tools and materials
- Chalk line — Marking the inner edge of the rim joist and joist layout
- Hammer — Tacking down the rim joist with nails
- Pencil — Marking joist positions
- Rim joists — Perimeter boards that form the outer frame of the floor system
- Sill plate — The base to which the rim joists are attached
- Speed square — Marking precise joist layout positions
- Nails — Temporarily securing the rim joist