The builders will have to strengthen the existing joists with additional timber.
施工人员将不得不另外用木料加固现有的托梁。
However, relatively few of the secondfloor ceiling joists themselves were damaged.
但是第二层楼天花板托梁却被破坏得较轻微.
Sections : Various shapes of cross - section for construction, such as beams, girders, joists, rails, angles, etc.
型材--横断面有各种形状,用于建筑, 如钢梁 、 槽钢 、 工字钢 、 钢轨 、 角钢等.
My last aquarium gave off so much humidity that it ate away the ceiling joists and the roof almost collapsed.
来自WSJ
She looked up at the exposed joists and above the joists at the thin flooring.
来自NEWYORKER
He was going to sweep his way through the floor, the joists and plaster.
来自NEWYORKER