How To Keep New Power Line Fromdrooping Between Floor Joists

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.

How to keep new power line fromdrooping between floor joists.

Find a replacement joist that is the same size as your floor joist. You can notch and bore joists without sacrificing critical strength but you must follow the rules. Can be drilled in the middle of the i joist away from the ends and load bearing wall. But larger is not always better when builders are constructing a home or adding a room addition.

To minimize future squeaks spread con struction adhesive onto both the existing joist and the new joist. Away from any end or load bearing wall second photo. There shouldn t be any cuts or penetrations in the middle third of the joist or at the bottom of the joist either. If you have manufactured i joists you can drill holes up to 1 1 2 in.

The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example. Attaching an electric wire under a ceiling joist. If your floor joist is an i joist for example buy an i joist. Make sure you also buy the same type of joist.

If your floor joists have been cut improperly to install pipes wiring or hvac ducts this could be causing your floor to slope. If your home is more than 20 years old your floor joists are most likely solid wood 2x8s 2x10s or 2x12s. Posi tion the top of the new joist alongside the top of the existing joist. If the existing floor joists are bowed downward noticeably they might need to be jacked up slightly to make installing the new joists easier.

Follow the rules to keep your floor solid. Find a new floor joist with these exact same dimensions. Diameter almost anywhere in the web area the area between the flanges. The notching and boring rules of thumb for solid lumber are shown in fig.

Use a tape measure to measure the length width and height of your existing floor joist. If you have improper holes and notches from alterations and running service lines this can be the source of weakened joists. Holes up to 4 in. When it s undesirable for the sewer line to extend below the bottom of the floor joists the best option is to run the pipe parallel between two joists.