non slip grooves made over the treads of staircase finished by granite stone flooring and for steps of an high rise building fire

adhesive adhesives anti architecture awareness broken building civil close closeup color construction damaged danger edges finished finishes granite granites grey groove grooved grooves home house interior interiors maintenance mason nonslip noses nosing person polished residential safety slip slippage slipped slippery stair staircase stairs step steps three tread treads triple walk