Many builders assemble and brace the crap out of these trusses on the ground as a whole to allow the crane to lift the entire set in one shot.
How to put up roof trusses.
This video illustrates each step in safely erecting roof trusses as well as related topics like risk management falls protection and manual handling.
You could start on one end and set them all square all the way to the other end and then deal with the two end trusses being out of square or as tom said start in the middle and deal with them on both ends.
The only thing to do is pick where you want to have the out of square trusses once you get to the end of the roof.
The beam extends to the far end of the roof hanging over.
Typically two or more trusses are nailed together and metal buckets are attached on a 2 layout.
Putting up the roof trusses feels like a major milestone as for the first time the house finally has it s basic shape established.
After setting the second truss in the same manner workers attach a ridge beam to the peak of both trusses.
Mostly if you get manufactured plywood it may not fit your roof design and size so you need to cut it according to your requirements.
As of the publishing of this post we have about 3 5ths of the trusses in place.
Girders trusses like these support the weight of other trusses where no bearing wall is in place.
Installing roof trusses on the roof design roof truss.
For this you may also have to do some.
When trusses are in place tops of columns will easily move forward or backwards so all truss supporting columns end up spaced per plans.