These joists are supported by the walls and perhaps also by an interior load-bearing partition in much the same way that floor joists are supported by the foundation walls and a girder.

• 这些搁栅由墙支承着，也可能还受内部承重问壁支承，在很大程度上与楼板搁栅受基墙和大梁支承的情况相同。