| 摘要 |
<p>PURPOSE:To restrain manufacturing cost by integrally forming a sheathing roof board section having a roof material laid on the upper side thereof, and a rafter section with the lower side thereof fixed to the truss structure of a roof unit for supporting the roof material, using an impermeable material. CONSTITUTION:A sheathing roof board section 5 having a roof material 4 laid on the upper side thereof, and a rafter section 6 of grooved structure with the lower side thereof fixed to roof beams 2 for supporting the roof material 4 are integrally formed out of a steel plate as an impermeable material, thereby forming a roof substrate 3. At the time of executing a work, the roof beams 2 are laid on the transverse beam 1 of truss structure, extending over an area from the side of a building to the side of an eaves at the predetermined gap. Furthermore, the rafter sections 6 are fixed to the beams 2 with bolts, and the roof material 4 is fixed to the sheathing roof board section 5.</p> |
