Installing Floor Joists For Second Floor

For most jobs 2 in 5 1 cm x 10 in 25 cm boards are an ideal size.

Installing floor joists for second floor.

Step 5 finishing up. This article provides step by step instructions and pictures on how to make structural repairs by sistering floor joists alongside weak joists. The lengths should be the same because you took the time to make the sill plates square and parallel to each other cut the floor joists. Put the floor joists on the layout marks on the sill plate.

If you have sagging cracked or twisted joists which can happen in older houses this project will provide the extra support the floor needs. You ll use the same size lumber to assemble the rim joists as you will for the main floor joists. Here s a how to guide on joist hanger installation. The rim joist sits vertically on top of the sill plate along the outside of the frame to create a lip for the main floor joists.

The joists are so straight that i can t hardly find the crown in the lumber. These large 4 by 8 panels fit snugly together to form a structurally sound walking area on which to install the second story walls. Repeat the process as many times as necessary to have joists at roughly 16 inch intervals underneath your floor. When installed properly joist hangers will keep your deck or floors sturdy and durable.

Once the floor joists are in place it s time to install the subfloor which is typically 3 4 inch tongue and groove plywood or oriented strand board osb. Measure the distance between the rim joists.