entrance gangway with anti-slip surface made of plastic

architecture construction transparent reflection balustrade connectors galvanized industrial protection restaurant transport landscape stainless undefined waterway handrail security triangle flooring symmetry walkway harbour connect filling netting outdoor plastic protect railing terrace vehicle stadium bridge winter design public safety animal window circle track fence water chain black cable close floor loops metal river slope steel white glass light wheel iron wall wood roof snow arch tree ramp link gray grid loop mesh overpass line mast