балка (перекрытия, подвесного потолка, пола, крыши) ; вспомогательная балка
- joists and planks
- bar joist
- beveled joist
- boarding joist
- bridging joist
- ceiling joist
- common joist
- filler joist
- ground joist
- header joist
- inverted T-shaped joist
- nailing joist
- notch joist
- open-web joist
- open-web steel joist
- rolled steel joist
- solid-sawn floor joist
- steel joist
- T joist
- tail joist
- telescopic metal joist
- timber joist
- trimmer joist
- trussed joist
- wooden joist