Abstract: There is disclosed a metal roof support structure comprised of rafter beams, ceiling beams, and internal structural supports, the aforesaid members overlapping in snap-fit interlocking relationship, the intersection points of each of the aforesaid elements being secured by a single fastener. The rafter beams and ceiling beams are comprised of a structural member adapted to interlock with a second structural member of similar construction to form the rafter beams and ceiling beam, each of which presents an "I" beam cross-section when so assembled.

Abstract: A latch extender for a pivotal window assembly of a vehicle in which the pivotal window assembly includes a latch member for engaging the locking mechanism of the door of the vehicle, the latch extender being rigidly affixed to the latch member of the pivotal window assembly, the latch extender having a hasp substantially identical to the latch member of the pivotal window assembly, the hasp of the latch extender engaging the locking mechanism of the door assembly so as to secure the pivotal window assembly in a locked, yet opened position to permit cross ventilation within the vehicle while operating.