Installing Timber Floor Joists

Now you are ready to cut and install the floor joists.

Installing timber floor joists.

I joist span standards make them a stiffer floor. I have a 80 year old home. 09 timber flooring design guide page 4 introduction scope this publication provides a reference guide for the installation of solid timber strip flooring over bearers and joists timber based sheet flooring products and concrete slabs. 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.

You ll use the same size lumber to assemble the rim joists as you will for the main floor joists. Engineered i joists are manufactured under exacting conditions to ensure consistent strength that provides long span and high load capabilities. I have added 7 16 osb to the t g and plan on putting 2 8 blocking every 24. The floor joist are rough cut 2 8 spaced 24 oc with a 8 span.

Face nail each board at the point of every joist and set the nail with a nail set. Begin by selecting a long board to start the first row. I joists can be ordered with depth up to 16 inches allowing their usage on greater spans. Join the ends of the boards over a floor joist where possible avoiding joints that form an h.

I joist is more consistent in size and shape than traditional floor 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. Measure the distance between the rim joists. In cases where greater open spans are needed framers often use joist hangers which are u shaped hardware pieces that are nailed in to accept hold and support flooring joists.

Put the floor joists on the layout marks on the sill plate. For most jobs 2 in 5 1 cm x 10 in 25 cm boards are an ideal size. Besides solid wood joists systems such as i joists and flooring trusses provide other options for consideration when it comes to installing a flooring framework. Keep joints that line up at least two rows apart.

The apa standard makes engineered i joists wood easy to order. Before starting calculate the width the last row will be. Pick one that is straight. Will this support new 3 4 t g running parallel to floor joist.

The flooring is 3 4 t g nailed directly to the floor joist. Generally floors of this type are of solid timber or a laminated product made from layers of timber. Align the edge of the board with the chalk line and drill pilot holes down through the hardwood plank and into the sub floor and joist. These installation tips are supplementary to your manufacturer s instructions and technical guides.