| 摘要 |
<p>PURPOSE:To reduce labor at a construction site and material costs in constructing a roof. CONSTITUTION:A truss 21 comprises a tie beam 13 for connecting both of pole plates 12, 12 and a pair of rafters 11, 11 tilted from the ridge 5 of the roof toward both of the pole plates 12, 12, the tie beam 13 and the pair of rafters 11, 11 serving as top and bottom chords, respectively. In a roof of a building where roof panels 9 are laid on the rafters 11 of the truss 21, a core truss 14 having a gate structure smaller in width than the length of the tie beam 13 is secured at the middle and upper side of the tie beam 13 and then each pole plate 12 is connected to the upper corner portion of the core truss 14 by the rafters 11 previously assembled to the lower side of the roof panel 9. The pair of rafters 11 are butt joined to each other at the ridge 5 to form truss 21.</p> |
