Description
https://www.homebuildingandrepairs.com/repairs/crawl_space/index.html - In this floor framing repair video, I answer a common structural question: How do you install larger 2x8 or 2x10 floor joists into an existing floor system originally built with 2x6 joists? Setting different-sized lumber on the same beam results in uneven floors, so we explore practical solutions like lowering existing girder beams, adding joist hangers, and installing new mid-span or end-support beams with new footings.
Most importantly, we break down the math behind the International Residential Code (IRC) restrictions for notching the ends of joists where they sit on a load-bearing beam or foundation. Because the code limits end-notches to 1/4 the depth of the joist, I walk through specific measurements to show you which notching scenarios pass the math test and which ones fail. Always remember to check with your local building department or a structural engineer, as local codes can vary or allow for specific exceptions.