Supporting Floor Joists That Have Been Cut For Plumbing

How do you support loads when a joist must be cut for plumbing.

Supporting floor joists that have been cut for plumbing.

This space is the logical exit point for dryer and furnace vents big electrical service wires and fireplace fresh air intakes. B the framing member that runs around the perimeter of your house and that the floor joists butt into often gets riddled with large holes. If you ve had a chronically damp basement or crawlspace look for indications of insect damage to structural members. Only a small section in the master bath is affected but it looks like i will have to pull the vanity cut out old sub flooring and figure out how to support that section of the floor where the toilet will rest once all the repairs are done tackitybits continues.

This article provides step by step instructions and pictures on how to make structural repairs by sistering floor joists alongside weak joists. Even worse is that over time any rot or decay from moisture that these cut up joists see will result in a dangerous situation where if the job was done right the joists would be able to handle the load. Section r502 10 of the international residential code states that header joists can be the same size as the floor joists when the header joist span isn t greater than 4 feet but if the header joist span is more than 4 feet you ll need to double the header joist and ensure that it s capable of. If you have sagging cracked or twisted joists which can happen in older houses this project will provide the extra support the floor needs.

The rim joist fig. Look for insect damage and moisture. Additional support for the floor joists is achieved by nailing the ends of the joists into headers. The idea behind this is pretty simple.

The joist was cut to make room for the pvc waste pipe for the toilet. Also look for floor joists that have been cut improperly to install pipes wiring or hvac ducts.