Mono & twin stringer stairs
Feature stairs on a single central spine or paired stringers, with timber or stainless treads and glass or wire balustrade.

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Mono-stringer, twin-stringer and folded-plate steel stairs for houses, decks, mezzanines and commercial buildings, built to the engineer's detail and finished galvanised, powder coated or raw. Treads in timber, checker plate or stainless.
The range
A steel stair is a permanent fixture and has to be right the first time. We check the rise and going against the site, fabricate to the engineer's detail and install with the handrail so it is one job, not three.
Feature stairs on a single central spine or paired stringers, with timber or stainless treads and glass or wire balustrade.
Zig-zag plate stringers for a clean architectural look in houses and offices.
Galvanised stringers with checker-plate or timber treads for decks, retaining walls and back doors.
Industrial stairs and landings to the mezzanine or the roof, with kick plates and handrails to code.
Indicative pricing
Indicative range only. Rise, number of flights, tread material, balustrade and finish all move the price a long way.
From a pair of galvanised deck stringers to a feature mono-stringer stair.
Deck stringers from $2,500; internal stairs typically $8,000–$25,000 + GST
Balustrade is priced separately — see the handrails and balustrades page. Engineering (PS1) is by your engineer.
Questions
Internal and most external stairs that are part of a building consent need a producer statement from an engineer. We fabricate to their detail and can point you to engineers we have worked with.
Solid timber, checker plate, stainless, folded plate with a timber or stone insert, or open grating for external stairs. Treads are usually supplied by us and fitted on site.
Yes. Stairs are trial-fitted in the workshop, then delivered and installed by us, usually together with the handrail or balustrade.
How it works
We confirm size, materials, the loadings or spec and how it will be used.
It is all priced before any steel is cut, so there are no surprises.
Built in the Patumahoe workshop to the agreed spec.
Delivered, fitted or installed and checked over before handover.
Also built here
Beams, posts, lintels and brackets for renovations, decks and pergolas, made to the engineer's drawings.
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ViewSend through photos, rough measurements and how it’ll be used — we’ll come back with a practical next step and a price.