Joist Spacing
From Open Source Ecology
- Table - 2x12s can do 25' if 12" spacing for 30 psf snow load. [1]
- Farm buildings in MO - 20 PSF live roof load and 80 MPH wind. [2]
- Chapter 6 wall construction, R602 - wood walls - R602.7 headers - Covers headers. About 13' span allowed by code for 4 2x12 headers for a 20 foot wide building. [3]
