I'm calculating the rafter thrust for common rafters at 33" OC to determine how much tension will be applied at the tie beam tenons. My math yields a horizontal thrust of 712 lbs per rafter (same as the load) for a 6:12 pitch. Have I got that right?
Multiplying the total load per rafter by 11 gives a total horizontal thrust being transmitted to the top plate of 7,832 lbs. That horizontal thrust will be held by 4 bents. That means that each of the two middle bents will have a tension of 2,611 lbs at the tie beam tenon. Right?
With two pegs, each connector will have 1,305 lbs applied at full design load?
Thanks!
