I'm would recommend finding a local lumber yard to help. I found both to be very willing and helpful when it came to running numbers for me. California amendments provide consistency with model code format, state and. This is a fully integrated code based on the 2018 International Residential Code® (Chapters 2-10). One for the Doug Fir lumber and another for some locally made Glulam beams. California Residential Code (CRC) contains building provisions that cover construction of one- and two-family dwellings and townhouses that are three stories or less. I think they were also concerned if I didn't taper them and then wrapped them with another wood species.Īt any rate, I have had two lumber yard run numbers for me. I think the main concern was that I wanted to taper them and support the overhang on the eaves. I talked to some contractors about using I-joists and they said they weren't crazy about the idea of using them with the exposed rafter tail look I'm going for. I have my notes for all of this around here somewhere but can't find them at the moment. I think our snow loads are 30 pounds per square foot and he doubled that when he ran the numbers. 2x10 was also okay but the guy said he liked the extra safety factor of 19.2" spacing. Two foot overhangs on both eaves.Ģx12 Douglas Fir was fine at 24" on center. Which first spanning table your for roofs where of room belongs not appendix until the rafters (with no snow load. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. Rafters is ceiling not attached to rafters, ground snow load 50 psf, doa auflast 20 psf, deflection bound L/180. I had a lumber yard run some numbers for me for a nearly identical project - single sloping roof across a 16' building depth. Rafters with ceiling doesn attached to rafters, live load 20 psf, dying download 20 psf, deviation limit L/180.
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