1 there are 2 support beams that run from front to back of the 23 garage.
Roof sags in middle old garage.
Check the ceiling for sagging by attaching a string on one end of the beam and run it along the bottom edge of the beam.
With the joist back in its original position place one section of the angle iron on the uppermost section of the rafter just before the area where it is sagging or broken.
Undersized rafters also can cause sagging along the whole side or plane of a roof.
Roofs sags for various reasons.
Step 1 the first step is to the basement first.
A ridge that droops in the middle forming that unintentional western design feature likely is due to undersized rafters and or missing or inadequate internal bracing rafter or collar ties.
Attach it to the beam with carriage bolts but do not tighten completely.
It is not unusually for roofs to sag a little over time but there are a few things to inquire about.
This extra weight may cause sagging.
More than one roof coating may have been installed.