Unsupported browser

For a better experience please update your browser to its latest version.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

A staircase of folded steel plate

  • Comment
working details

At the heart of the house is a large masonry-built fireplace which divides the sitting room from the kitchen - a doubleheight space with a first floor gallery running along one wall.

The rear wall of the chimney breast supports a cantilevered staircase which rises along it to give access to the gallery and the adjacent en suite master bedroom.

The staircase consists of a 4mm-thick steel plate carriage, folded to form treads and risers.

It is 740mm wide and welded to a 10mm steel string that is secured to the chimney breast with M12 resin bolts. The folded plate cantilever spans from ground floor to landing so that the forces act together to achieve stability.

The 40mm-thick European oak treads are secured from below with recessed head screw fixings (all slot heads neatly aligned), and project over the outer edge of the folded steel carriage. The resulting problem - how to fix the balustrade - was solved by another cantilever. Three 75 x 15mm steel flats are welded to the wall string as baluster supports; they project below, and free of, the folded steel plate and turn up beyond the treads to form 65 x 15mm balusters. A continuous 65 x 10mm handrail is welded to the balusters.

A balustrade of 3mm stainless steel wire rope, obtained from a local yacht chandlery, is secured by 'standard special' hammer swage fittings with angled countersunk stand off washers.

All steelwork is finished in silver grey micaceous paint and the oak treads are oiled.

In the architect's own words:

'The cantilevered stair takes flight off the chimney and aims to make the owner's ascent to bed each night a minor ascent to a higher plane.'

  • Comment

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions.

Links may be included in your comments but HTML is not permitted.

Related Jobs

AJ Jobs