Curbless multiple skylight and smoke vent system

An elongate side rail having a length, for attachment to a rib structure of a metal panel roof, such metal panel roof having panel flats, and rib elevations extending upwardly from such panel flats, the rib elevations of next adjacent ones of such roof panels defining such rib structure, said elongate side rail comprising:

• (a) an upstanding riser;
• (b) an upper flange extending from said upstanding riser;
• and
• (c) an elongate bottom shoulder structure extending from said upstanding riser, said elongate bottom shoulder structure comprising an elongate surface extending along the length of said side rail, and facing in a direction having a downwardly-directed component, the elongate surface having a first surface element extending, from said upstanding riser, laterally away from said upstanding riser, said bottom shoulder structure further comprising a second surface element extending from the first surface element to a distal edge thereof, in a direction having a downwardly-directed component.

An elongate side rail having a length, for attachment to a rib structure of a metal panel roof, such metal panel roof having panel flats, and rib elevations extending upwardly from such panel flats, the rib elevations of next adjacent ones of such roof panels defining such rib structure, said elongate side rail comprising:

• (a) an upstanding riser having first and second opposing major surfaces;
• (b) an elongate bottom shoulder structure extending from the first surface of said upstanding riser;
• (c) an upper flange extending from the second opposing surface of said upstanding riser, in a direction away from said bottom shoulder structure, to a distal edge of said upper flange;
• and
• (d) an inner web extending downwardly from the distal edge of said upper flange, said inner web having an inwardly-facing surface facing toward said upstanding riser across an open space, and an outwardly-facing surface, facing away from said upstanding riser.