Panel construction for a wall or roll-up door system

A pair of replaceable panels for use in a roll-up door system or the like, each panel comprising:

• a generally square-cornered sheet of formed material bounded by opposite side edges and opposed first and second edges extending between said side edges, said sheet having a plurality of transverse, regularly spaced corrugations extending between said side edges;
• said first and second edges being formed with mating configurations such that the first edge of one panel may be slid into engagement with the second edge of an adjacent panel in a direction generally parallel to said side edges so that a pair of adjacent panels may be joined together;
• said first edge configuration including a generally planar edge segment joined to said sheet by a flat-folded, double thickness portion adjacent said first edge;
• and
• said second edge configuration including a narrow U-shaped section in which the sides of the U are separated by the thickness of the sheet material for receiving said generally planar edge segment of said first edge configuration in mating engagement therein;
• the panels being joined together with mating respective first and second edge configurations wherein the shapes of the respective first and second edge configurations are such that the joined edge configurations are in substantially continuous surface contact from the bottom of the flat-folded, double thickness portion to the terminal edge of the planar edge segment.

A roll-up door system for mounting across a door opening, comprising:

• a pair of guide tracks for vertical installation as door guide members on both sides of the door opening;
• a hexagonal tube member, said hexagonal tube member being hollow;
• a plurality of drums mounted on said hexagonal tube member, one of said drums being mounted at each end of said hexagonal tube member, each of said drums having means defining a generally hexagonal central opening for receiving the hexagonal tube member therein;
• an axle extending through the interior of said hexagonal tube member;
• bearing means for mounting said hexagonal tube member for rotational movement on said axle;
• means for supporting said axle in a horizontal position adjacent the upper edge of the door opening;
• and
• a roll-up door mounted at the top thereof to and supported by said plurality of drums, said roll-up door being positionable to cover the door opening with the side edges of said roll-up door being retained by said guide tracks, said roll-up door being rolled about said plurality of drums as said roll-up door is raised;
• said roll-up door comprising:
• a plurality of panels joined edge-to-edge to form the roll-up door, each panel being in the form of a generally square-cornered sheet of formed material bounded by opposite side edges and opposed first and second edges extending between said side edges, said sheet having a plurality of transverse, regularly spaced corrugations extending between said side edges;
• said first and second edges being formed with mating configurations such that the first edge of one panel may be slid into engagement with the second edge of an adjacent panel in a direction generally parallel to said side edges so that a pair of adjacent panels may be joined together;
• said first edge configuration including a generally planar edge segment joined to said sheet by a flat-folded, double thickness portion adjacent said first edge;
• and
• said second edge configuration including a narrow U-shaped section in which the sides of the U are separated by the thickness of the sheet material for receiving said generally planar edge segment of said first edge configuration in mating engagement therein.