means of edge hinges 31 and inner hinges 30 bottom panel 20 is comprised of a plurality of vertical reinforcing members 32 and lower and upper horizontal reinforcing members 34 36 oriented at approximately 90 u00b0 with respect thereto the vertical reinforcing members 32 are located adjacent where the edge and inner hinges 31 30 are positioned on bottom panel 20 for structural integrity similarly lower and upper horizontal reinforcing members 34 36 extend the entire length of bottom panel 20 in providing enhanced reinforcement therefor the hinges afford the flexibility required of overhead door 10 in traversing the curved portion 18a of the parallel tracks 18 while providing structural integrity for the multipanel configuration of overhead door 10 in addition rollers 40 are rotationally coupled to edge hinges 31 which in turn are securely affixed to the lateral portions of each door panel in this manner the lateral edge portions of overhead door 10 are maintained in position relative to and guided by parallel tracks 18 referring to fig4 there is shown an exploded and partially cutaway view of the lower left portion of the inside surface of overhead door 10 shown in fig3 attached to edge hinges 31 are rollers 40 which engage the immediately adjacent parallel track not shown rollers 40 are detachably coupled to edge hinges 31 so that they may be removed therefrom by a force exerted on the roller in a direction generally parallel to roller shaft 40a thus with rollers 40 engaging the immediately adjacent parallel track 18 in a conventional manner the displacement of bottom panel 20 due to an impact force applied thereto will cause the edge portions of bottom panel 20 to be displaced away from the adjacent parallel track this.