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.

Follow the rules to keep your floor solid. Make sure you also buy the same type of 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. 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. If you have manufactured i joists you can drill holes up to 1 1 2 in. 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.

The notching and boring rules of thumb for solid lumber are shown in fig. Attaching an electric wire under a ceiling joist. 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. If you have improper holes and notches from alterations and running service lines this can be the source of weakened joists.

Just stay 6 in. Posi tion the top of the new joist alongside the top of the existing joist. Diameter almost anywhere in the web area the area between the flanges. If your floor joists have been cut improperly to install pipes wiring or hvac ducts this could be causing your floor to slope.

There shouldn t be any cuts or penetrations in the middle third of the joist or at the bottom of the joist either. Use a tape measure to measure the length width and height of your existing floor joist. Holes up to 4 in. Find a new floor joist with these exact same dimensions.

To minimize future squeaks spread con struction adhesive onto both the existing joist and the new joist. Adding a new ceiling light direct wiring an attic fan or installing any other type of overhead electrical fixture requires access to electricity. Find a replacement joist that is the same size as your floor joist. Away from any end or load bearing wall second photo.