rusty metal grates in weathered concrete

abstract angle beam brick brickwork brown chrome close-up closeup concrete crossing dirty factory floor flooring grate grates grey grid grille hard hardwood high hole honeycomb industrial industry iron line material mesh metal metallic net outdoors pattern perforated plate protection repetition repetitive roof rough row rusty sheet shiny silver soil stained stainless steel strength structure surface symmetry technology texture textured tile track view wall weathered wet wood