Every number here is a working estimate to check with your building authority. Whoever prints this page takes responsibility for what is in it.
Click the fault
Where a joist cannot be cut
Show a hint
A notch in the middle third and a butt joint at mid span.
Every number here is a working estimate. Check it with your building authority.Turn JavaScript on to work the lesson. The drawing shows how it starts.
The rule this lesson teaches
Notch no deeper than about a quarter of the depth, never in the middle third, and join only over a support.