粗大的横梁支撑着上面的楼面。

Heavy timbers supported the floor above.

悬臂，支架伸在支点之外的一个构件，如一段横梁，由与其持平衡的或向下的在支点后面的一个力支撑

A member, such as a beam, that projects beyond a fulcrum and is supported by a balancing member or a downward force behind the fulcrum.