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七、檩条的构造檩条本身就是一根小梁,故第六讲中有关梁的构造要求,对檩条大部分能够适用,应遵守。但需补充说明倒L形或T形、I形檩条挑出来的小悬臂部分的配筋构造:对倒L形檩条,当C≤250m m时,可放一根通长的φ6纵向钢筋,箍筋用φ6,间距不得大于200m m或檩条内箍筋间距之半;当C>250mm时,应放上下两根通长的中6纵向钢筋,箍筋按计算确定,不大于φ6@200,两种情况的箍筋形式也不同(见第八讲图3)。对T形檩条,配筋构造见第八讲图4。
7. The construction of a purlin is a trabecula. Therefore, the construction requirements for the beam in the sixth lecture are applicable to most of the purlins and should be observed. However, it is necessary to supplement the structure of the small cantilever part of the inverted L-shaped or T-shaped, I-shaped purlin. For the inverted L-shaped purlin, when C ≤ 250m m, a long φ6 longitudinal steel bar can be placed. The ribs shall be φ6, the spacing shall not be greater than 200m or half of the stirrup interval within the purlin; when C> 250mm, two long-medium-length 6 longitudinal steel bars shall be placed, and the stirrups shall be determined by calculation, not greater than φ6@200. The situation of stirrups is also different (see Figure 8 in Figure 8). For T-shaped purlins, see figure 8 of figure 4 for reinforcing structures.