How To Pop Out Knockouts On Floor Joists

Working in the unfinished basement below the bouncy floor we had to remove the plumbing and electrical lines running through the joists and then rerun the lines after the new 2x10s were in place.

How to pop out knockouts on floor joists.

A knock out or ko is a partially stamped opening in electrical enclosures that allows quick entry of a wire cable or pipe via connector or fitting to the interior. We have had a frozen waterpipe there and i want to check for damage to the pipe a. You can cantilever from 2x8 joists a maximum distance of 29 inches. Locating floor joists under carpet.

If this is the case remove the nail. Measure your floor joists. Years ago while working as a carpenter i helped stiffen a bouncy floor by nailing a new 2 10 to each of the 2 10 joists that supported the floor. Generally bump outs can be cantilevered a distance equal to four times the size depth of the floor joists.

Screw the strips into the floor joists or subfloor. When you choose to cantilever a bump out the dimensions of your house s joists dictate the depth of the bump out. Depending upon the conditions it is possible to strengthen or repair existing framing members such as floor joists or roof rafters by adding reinforcing material. Cut your boards with a table saw to these proportions.

Sometimes a nail that misses a joist will rub on the framing below as the floor deflects. Use screws to secure the leveling strips to the floor every 16 inches. For example a 2x8 joist has a depth of 7 1 4 inches. Holes should be a minimum of 2 in from the top or bottom of the joist and no larger than 1 3 the depth of the joist.

If the floor slants irregularly cut strips that bridge the cap at each floor joist. I want to know where the floor joists are inside a small closet because i may need to make an additional trap door to access the crawl space nearby under our kitchen. As above cut through the tongues and then using bolster chisel genty lift the boards. You need boards that are 2 inches deep and the same width and length as the original floor joists.

With the right information and technique you should be able to remove a ko from electrical panels and other electrical enclosures without any problems. To do this simply cut several leveling strips the same size as the original strip. It was a complex expensive job.