I have a home built in 1928 with 2x4 rafters over my front porch. 2 of the rafters are sagging at a knot in the rafter. The rafters are appox 14 ft. I was going to sister 1 2x4 x8' to a side of each impacted rafter using 4 3/8 zinc bolts and washers (2 above and 2 below) and then maybe a kneel wall at the sag for support. Now, while this 'sounds' good, does it make sense from a physics / engineering standpoint?
1) will sistering a 2/4 to the side and not the full length provide the required stability
2) are 3/8" bolts to wide for a 2x4 or even a good choice?
I am in Atlanta with little to no snow so load is minimal. The footprint of the roof is approx 32'x 16'. Photos are attached.
Thanks for the valuable feedback
1) will sistering a 2/4 to the side and not the full length provide the required stability
2) are 3/8" bolts to wide for a 2x4 or even a good choice?
I am in Atlanta with little to no snow so load is minimal. The footprint of the roof is approx 32'x 16'. Photos are attached.
Thanks for the valuable feedback
