All our stair stringers are engineer certified and manufactured to comply with AS/NZS 1170. A full range from 1 to 17 treads are kept in stock. These are fabricated with a rise of 175mm, a going of 250mm and are Hot Dip Galvanized as standard. In addition, we can fabricate landing to landing and landing to concrete stringers in both standard and non standard rise and going. These can be constructed from either pre galvanized material or Hot Dip Galvanized to suit your particular situation. Timber, aluminium and concrete treads available.