37 Installation, maintenance and repair of metal fences, metal balconies, metal stairs, metal railings, glass railings; metal gates; metal artwork; handicap railings, and metal columns; Installation, repair and replacement of metal fences, metal balconies, metal stairs, metal railings, glass railings; metal gates; metal artwork; handicap railings, and metal columns; Refinishing of metal fences, metal balconies, metal stairs, metal railings, glass railings; metal gates; metal artwork; handicap railings, and metal columns