a group of workers build a reinforced concrete floor at a steel multistoried building worksite - 工字鋼 個照片及圖片檔
a male supervisor and construction workers build a reinforced concrete floor at a steel multistoried building worksite - 工字鋼 個照片及圖片檔
a group of workers build a reinforced concrete floor at a steel multistory building under construction - 工字鋼 個照片及圖片檔
prefabricated metal roof truss connected to a steel posts and beams framework at an industrial building worksite - 工字鋼 個照片及圖片檔
iron worker standing balanced on an i-beam attaches a roof truss to steel post and beams - 工字鋼 個照片及圖片檔
prefabricated metal roof truss suspended by steel cable is lowered onto an industrial worksite - 工字鋼 個照片及圖片檔
prefabricated metal roof truss suspended by steel cable is lowered onto an industrial worksite - 工字鋼 個照片及圖片檔
prefabricated metal roof truss suspended by steel cable is lowered onto an industrial worksite - 工字鋼 個照片及圖片檔
prefabricated metal roof truss suspended by steel cable is lowered by crane onto an industrial worksite - 工字鋼 個照片及圖片檔
prefabricated steel post and beam frame is lowered to an industrial worksite using steel cable - 工字鋼 個照片及圖片檔職業
steel i-beam girders are used to connect prefabricated post and beam frames at an industrial building worksite - 工字鋼 個照片及圖片檔
prefabricated steel post and beam frame is lowered to an industrial worksite using steel cable - 工字鋼 個照片及圖片檔
prefabricated steel post and beam framework is lowered onto an industrial worksite using a steel cable - 工字鋼 個照片及圖片檔
prefabricated steel post and beam frame is lowered to an industrial worksite using steel cable - 工字鋼 個照片及圖片檔
prefabricated steel post and beam frame is lowered to an industrial worksite using steel cable - 工字鋼 個照片及圖片檔
prefabricated steel post and beam framework assembled and erected at an industrial worksite - 工字鋼 個照片及圖片檔