Galintel Stair Stringers are available configured in 1 to 17 treads in a continuous pair with tread mounting brackets welded in place, ready for tread installation. Designed for use with a 50mm tread thickness and will take a maximum tread width of 1000mm. Hot-dip galvanised for maximum corrosion resistance and can be cast-in or bolted down using the bolt down brackets (sold separately).