MOVING CEILING

PURPOSE:To improve stage effect of light by drawing and supporting radial vertical cables laid in a spider-web form by witches provided at proper intervals on the inner circumferential surface of a large erected structure, and sticking a film material having a proper light permeability and tone on the cable. CONSTITUTION:A moving ceiling 1 is drawn and supported by winches disposed on radial lines drawn at intervals of 45 deg. from the center of an opening and closing doom roof ring beam 2. The moving ceiling 1 is made into a net ceiling by wire cables knitted in a spider web form by lateral cables 6 linearly laid between vertical cables 5 radially disposed at the angle of 45 deg. with a tension ring 4 as the center. A ceiling suspending winch 9 is provided on the top of an arch beam 8, a wire 10 is suspended therefrom to connect the tension ring 4 to its lower end, and the moving ceiling 1 is suspended and supported by an auxiliary wire 11. Hence, a space under the ceiling suitable to an event can be produced and constituted.