a man stands on a concrete beam, causing it to collapse under his weight, in a demonstration of how rebar can be used to reinforce concrete, uk. - 鋼筋 個影片檔及 b 捲影像00:09
sequence showing young people training on the job at a building site as part of jamaica's citizen security justice programme. - 鋼筋 個影片檔及 b 捲影像00:27
sequence showing a young woman undertaking on-the-job skills training laying plastic tubing as an electrician as part of jamaica's citizen security justice programme. - 鋼筋 個影片檔及 b 捲影像00:08