A load supporting truck bed cover for covering a bed of a pickup truck, the bed having a front end, a rear end, and a pair of sidewalls extending between the front and rear ends, each of the sidewalls having an upper edge, the truck bed cover comprising:
- a first elongated bed rail attached to and extending along a length of one sidewall and a second elongated bed rail attached to and extending along a length of the other sidewall, each of said first and second elongated bed rails having a horizontal web disposed along the upper edge of the sidewall to which it is attached, a first vertical web extending upwardly from said horizontal web, a second vertical web extending downwardly from said horizontal web, and a pair of extension beam openings through said first vertical web and spaced toward opposite ends of thereof;
- a plurality of rigid panel sections, each having a pair of lateral sides and a width extending between said pair of lateral sides, wherein each rigid panel section of said plurality of rigid panel sections being selectively positioned on said horizontal webs of said first and second elongated bed rails such that said width of each rigid panel section extends across the bed and across at least a portion of each horizontal web;
- wherein adjacent rigid panel sections are hingedly connected such that two or more adjacent rigid panel sections of said plurality of rigid panel sections are pivotable about axes perpendicular to the sidewalls of the bed between a closed position where the bed is covered and an open position where the bed is open;
- a first elongated member having a length and opposite first and second ends, said first elongated member being selectively positioned on horizontal webs of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each horizontal web;
- a first extension beam having a length, said first extension beam extending through one of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said first end of said first elongated member;
- a second extension beam having a length, said second extension beam extending through a second of said extension beam openings of said first elongated bed rail and slidably connected to said first elongated member and selectively positionable in extended and retracted positions relative to said second end of said first elongated member;
- a second elongated member having a length and opposite first and second ends, said second elongated member being selectively positioned on horizontal webs of said first and second elongated bed rails such that said length of said first elongated member extends across the bed and across at least a portion of each horizontal web;
- a third extension beam having a length, said third extension member extending through one of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said first end of said second elongated member;
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- a fourth extension beam having a length, said fourth extension member extending through a second of said extension beam openings of said second elongated bed rail and slidably connected to said second elongated member and selectively positionable in extended and retracted positions relative to said second end of said second elongated member.