First job was to build a jig to assemble the Bows onto. Its important to get all of these the same to match up to the poles concreted into the ground and to just look nice. The Bows are somewhat sprung until the W-Truss part is added in, that is the ridgeline part when put together has an actual spread closer to 32 feet. There is some good smarts going on behind this little detail because the swaged portions fit snug into each other then when that tension is placed on them it helps to keep them locked together.
The jig was built on an old trailer frame which made a perfect large flat surface for doing this and it was great doing this work up off the ground. You can do this on good flat ground using a couple of stakes to spring the Bows but it will save a whole lot of back if you can build some sort of table to work on. There were 22 Bows total for the two greenhouses and loads and loads of clamps and self tapping screws to put in. An impact drill driver is a must, a couple even better as I used one for tightening bolts on clamps and a second for driving screws.
Another shot of the whole jig with a completed Bow in it then a shot of the Bow flipped off onto the ground. At about 120lbs each assembled they are manageable with forethought. Being 30 feet wide and about 8 feet tall the Bows are unwieldy but I was able to flip them off onto the ground and carry them over to the West Greenhouse for staging (11 went over there and 11 stayed right where they were flipped off).
