| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a building having a large span roof structure without arranging a vertical support member such as a column to block visibility in the stands, capable of narrowing a large roof support span relative to a span between outer peripheral parts of the stands to reduce stress and deformation of a roof supporting beam with low cost, allowing a sight line from a stand seat not to be blocked with a reduced beam depth, without having a projection part such as a hanging member on a roof surface. <P>SOLUTION: Four roof supporting beams 4 are bridged to vertical support members such as columns 2 arranged at an outer peripheral part of the stands to form a rectangle corresponding to a quadrilateral surrounding a stadium. At positions corresponding to four corners of the rectangle, main beams 5 crossing respective sides of the rectangle in oblique directions are installed in a state that both ends of the beams are supported with vertical support members arranged at the outer peripheral part of the stands. The four roof supporting beams are bridged, so as to be supported by these main beams in oblique directions at intermediate support positions. <P>COPYRIGHT: (C)2012,JPO&INPIT |
