building construction material mild steel tmt bars in the size of 16, 8, 10 and 12mm texture and background

10mm 12mm 16mm 500d 8mm abstract architecture backdrop background bangalore bar beam building closeup column concrete construction corrosion engineering fe500 fe550 focus grade india industrial industry iron karnataka material metal metallic pattern pile rebar reinforce reinforcement reinforcing rib rod rusty selective site size steel strength strong structure texture tmt wall wire