Endwalls are installed after all the arches have been erected and all of the bolts in the arches have been tightened.
The first step of installation of any style of endwall is to mark the centerline of the building on the foundation. Use this reference point to position the endwall panels.
When installing a solid endwall, the centerline will mark the position where the two longest endwall panels overlap. Be sure to tighten the bolts with your fingers only during this step.
Install these two panels first, and then install the remainder of the endwall panels working out towards the walls.
Once the panels are all in, you must go back and tighten all of the bolts with a drill to 10 to 12 foot pounds of torque.