the following are common problems with overhead sectional vehicle doors in garages except operability rot…

the following are common problems with overhead sectional vehicle doors in garages except operability rot /rust mechanical damage counterweights automatic opener problems question 46 scanning a porch with your eye at floor level is a good way to check for rot sag undersized floorboards loose or twisted joists insect damage
Answer
Answer:
The first question: D. counterweights The second question: B. sag