平屋顶的构成方式基本上与木地板相同。若干个平顶搁栅(或屋顶搁栅)从一面墙伸向对面的墙。
Flat roofs are framed in essentially the same way AS wood floors. a number of ceiling (or roof) joists run from one wall to the opposite wall.
屋面两坡的下方，檐口的连系梁支承在平顶搁栅之上。
At the lower end of each roof slope, eaves purlins are provided over the ceiling joists.
屋面两坡的下方，檐口的连系梁支承在平顶搁栅之上。
At the lower end of each roof slope, eaves purlins are provided over the ceiling joists.
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