How To Keep New Power Line Fromdrooping Between Floor Joists

Holes up to 4 in.

How to keep new power line fromdrooping between floor joists. If your floor joist is an i joist for example buy an i joist. Find a new floor joist with these exact same dimensions. Just stay 6 in. There shouldn t be any cuts or penetrations in the middle third of the joist or at the bottom of the joist either.

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. You can notch and bore joists without sacrificing critical strength but you must follow the rules. If the existing floor joists are bowed downward noticeably they might need to be jacked up slightly to make installing the new joists easier. Attaching an electric wire under a ceiling joist.

If you have manufactured i joists you can drill holes up to 1 1 2 in. Can be drilled in the middle of the i joist away from the ends and load bearing wall. If your floor joists have been cut improperly to install pipes wiring or hvac ducts this could be causing your floor to slope. But larger is not always better when builders are constructing a home or adding a room addition.

Away from any end or load bearing wall second photo. 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. If your home is more than 20 years old your floor joists are most likely solid wood 2x8s 2x10s or 2x12s. Adding a new ceiling light direct wiring an attic fan or installing any other type of overhead electrical fixture requires access to electricity.

If you have improper holes and notches from alterations and running service lines this can be the source of weakened joists. Use a tape measure to measure the length width and height of your existing floor joist. The notching and boring rules of thumb for solid lumber are shown in fig. Make sure you also buy the same type of joist.

Posi tion the top of the new joist alongside the top of the existing joist. Sistering joists is a job for the pros who will bolt the new joists to the old joists and position the ends of the joists on the same sill plate that supports the original 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. Follow the rules to keep your floor solid.