a worker uses steel tying wire to fasten steel rods to reinforcement bars. close-up. reinforced concrete structures - knitting of

background bar bars bender builder building cage close-up closeup column concrete construction dirty engineer engineering fasten fix fixer formwork foundation frame framework glove gloves hand hard industrial industry instrument iron job knipex knitting man metal people preparation professional rebar reinforced reinforcement reinforcing rod rods safety site steel structure structures timber tool tying wire work worker workers