Patent ID: 8833009

Claim:
A rail mounting system for mounting a skylight or other load on a metal panel roof system having panel flats, and rib elevations extending upwardly from such panel flats, said rail mounting system comprising first and second side rails for supporting opposing sides of such skylight or other load, each of said side rails having a profile configured to attach to a such rib elevation and to provide structural support for the skylight or other load along substantially an entire length of such skylight or other load, said side rail comprising: (a) an upstanding riser; (b) an upper flange extending from said upstanding riser; and (c) a bottom shoulder structure extending from said upstanding riser, said bottom shoulder structure comprising a first shoulder element attached directly to said upstanding riser, said first shoulder element extending along the length of said side rail, and laterally away from said upstanding riser, said first shoulder element having a first surface facing in a first direction having a downwardly-directed component, said bottom shoulder structure further comprising a second shoulder element attached directly to said first shoulder element, said second shoulder element extending in a second direction, different from the first direction, to a distal edge of said bottom shoulder structure, said second shoulder element having a second downwardly-directed component, said rail mounting system further comprising: upper and lower end closures extending upwardly from the panel flat and cooperating with first and second next adjacent ones of said side rails.