Building panel mounting system

DETAILED DESCRIPTION In order to overcome the deficiencies and drawbacks of the prior art building panel mounting systems, it is an object of the present invention to provide a mounting system employing fasteners which penetrate the building panel reinforcing ribs both at the edge joints and intermediate the joints to securely mount the panels on the underlying support structure.
Another object of the invention is to provide such a building panel mounting structure employing improved cap or mullion strips for effectively concealing the mounting fasteners and providing a uniform appearance for the panel edge and intermediate reinforcing ribs.
Another object of the invention is to provide such a building panel mounting system employing an improved mullion strip mounting clip which supports the mullion in spaced relation to the building panel whereby various ornamental mullion configurations may be employed.
Another object is to provide such a building panel mounting structure wherein the fastener concealing mullion strips are mounted in a manner so as to prevent siphoning of water to the top of the reinforcing ribs in a roofing structure.
In the attainment of the foregoing and other objects and advantages, an important feature of the present invention resides in the use of a plurality of resilient mullion strip supporting clips on the external surface of the building panels at spaced intervals along the reinforcing ribs.
The retainer clips are of a generally inverted U-shaped configuration adapted to fit over and conform closely to the outer surface of the reinforcing ribs at their outwardly directed top portion.
The legs of the clips extend in contacting relation with the ribs for a distance sufficient to assure accurate alignment then flare outwardly and terminate in an inwardly rolled edge spaced laterally from the sides of the rib and outwardly from the building panel outer surface.
The clamps have a central opening for receiving a roofing nail or threaded roofing screw so that the fasteners used to mount the panels to the purlins firmly secure the respective clamps in position