OP
wroughtn_harv
Super Member
There are two different ninety degree brackets. One is a square cut for joints like the post purlin. The other is cut to allow for inside of purlin to purlin connecting.
There are a couple of different ways to span the twenty one feet. I decided a back to back double purlin front to back would be stronger than trying to either span it with a support purlin under the purlins.
There are a couple of different ways to span the twenty one feet. I decided a back to back double purlin front to back would be stronger than trying to either span it with a support purlin under the purlins.