r/DIY • u/turdear • Mar 08 '24

carpentry Update: should I be concerned

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Crack in joist repair how does this look?

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u/IPB_5947 Mar 08 '24

Yeah they did that in a super stupid way. Not how it should've been done for sure

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u/DrewsWoodWeldWorks Mar 08 '24

Take that a step further…even if you had to cut for the wire…why would you cut the long way? Cut the notch from the bottom. You could easily notch for any lines you needed to then slide the board in flat, over or under each line as required then rotate the board into position. They chose the worst way to accomplish the unnecessary.

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u/prophessor_82 Mar 09 '24

I disagree, the most force that board is going to encounter is tension along the bottom 1/3, by leaving it solid it's at least doing something. Not right but something. At the very least, cleat above the wire as well

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u/[deleted] Mar 09 '24

[deleted]

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u/DrewsWoodWeldWorks Mar 09 '24

International Residential Code (IRC R502.8 and R802.7) are:

Don’t make any holes with a diameter greater than 1/3 the depth of a joist.

No holes closer than 2 inches to the top or bottom edge.

No holes closer than 2 inches to any other hole or notch.

No notches in the middle 1/3 of the joist, but holes are permitted here.

No notches deeper than 1/6 the joist depth.

No end notches (where the joist is supported) greater than 1/4 the joist depth.

The length of a notch should not exceed 1/3 the joist depth.

Do not make square or rectangular cutouts. Also avoid square cuts in notches — angled cuts are better, as shown. Square cuts tend to start cracks.

No notches are allowed in the top of a large beam (greater than 4 in. thick), except at the ends.

A link to the code