Abstract: An impact-resistant sectional overhead door comprising a plurality of panels with a first panel comprising a panel body without intervening vertical support between a first end and second end, and a tube comprising a plurality of walls configured to form a groove at each corner of the tube, with each groove being configured to receive a seal such as weatherstripping to seal an opening around a portion of the door. The grooves may be uniform, such that the same tube may be used in multiple different applications or configurations. The tube may be formed from a fiberglass material with a polyurethane resin base.