ROOF PANEL

PURPOSE:To simplify the execution of the fitting work of a lighting window to be facilitated, and enable the safety of the work to be improved by forming roof members, roof sheathings, and rafters integrally, and by erecting the lighting window without exceeding the whole thickness of a roof panel. CONSTITUTION:A lighting window 7 is composed of two upper and lower glass sheets 8 and window frames 9, and the window frames 9 are fixed on the roof members 2 of a roof panel 1, roof bed members 4, roof sheathings 5, and the like. After that, the thickness of the lighting window 7 is set within a limit for the thickness not to be projected from the level of the roof member 2 without exceeding, the whole thickness of the roof member 2 on the front side surface of the roof panel 1 and a rafter 6 on the rear side surface, at the upper and lower positions of the window 7. Then, the lighting window 7 is previously combined with the roof panel 1, and at the same time as the fitting work of the roof panel 1 is executed, the lighting window 7 is fitted.