For most jobs 2 in 5 1 cm x 10 in 25 cm boards are an ideal size.
Installing floor joists for second floor.
You ll use the same size lumber to assemble the rim joists as you will for the main floor joists.
If you have sagging cracked or twisted joists which can happen in older houses this project will provide the extra support the floor needs.
When installed properly joist hangers will keep your deck or floors sturdy and durable.
Here s a how to guide on joist hanger installation.
These large 4 by 8 panels fit snugly together to form a structurally sound walking area on which to install the second story walls.
Put the floor joists on the layout marks on the sill plate.
Step 5 finishing up.
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 2x12 lumber that i picked up a few weeks ago is perfect.
Measure the distance between the rim joists.
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.
The joists are so straight that i can t hardly find the crown in the lumber.
Now you are ready to cut and install the floor joists.
This article provides step by step instructions and pictures on how to make structural repairs by sistering floor joists alongside weak joists.