We were employed by construction management company Chisholm and Winch to design, supply and fit a steel staircase to the new Thames Barrier control building in south east London, constructed by Balfour Beatty.
This was a simple stair, except that the half landing had to be radiused on-plan to match the RC (reinforced concrete) frame of the wall adjacent. An electronic laser survey of the curved RC wall was taken, and the stair built to fit. Furthermore, Chisholm and Winch had to ensure the build up of insulation and plasterboard, applied to the RC, perfectly matched the wall behind. The stair was trial-built at our works in Shoeburyness, Essex. This was to check the rolled stringers were a perfect fit to the laser-cut landing plates, so all fitted the wall without gaps or clashes.
Once powder coated a rather bright yellow off-site, the stair was delivered and fitted on site without any issues!
What do you think of the finished product?
Do you require a steel staircase for your construction project?
We were commissioned by ACAI Group to replace a badly corroded external staircase at the rear of a property in Harrow.
The existing stair, being probably in excess of 20 years old, did not conform to current regulations and nor could the replacement stair due to the space restrictions, so permission was granted by Building Control to replace ‘like for like’ in terms of tread goings and risers.
At the time our in house drafting facilities were very busy on other projects so the design work and drawings were carried out by Sam Thewsey of DSD Ltd.
As this was an office access stair, we carried out the removal and replacement over 4 long days, partly over a weekend, to minimise disruption to the businesses.
The new stair stringers, treads and balustrade were hot dip galvanized for durability.
The challenge here was that the stair ran from 7th to 8th floor levels, and the only access was via a 2.5m long lift, so all the stair stringer and balustrade sections had to be less than this in length. They still required powder coating off site.
Our team designed the stringers to have neat joints to allow them to be bolted together once at the correct level and be as strong as if they were on one piece.
The half landing support posts formed an ‘X’ to reflect the end client’s logo.
The perforated balustrade panels were bespoke punched to form neat borders around each, the copper handrails were fitted by others.
LSJ also undertook the demolition works to form the stair void opening in the 8th floor slab.
This was subcontracted to Evolution Enabling of Rayleigh, who installed a crash deck, saw cut and removed the slab, which was equally as challenging as the stair install.
Are you interested in commissioning a feature staircase from LSJ Engineering?
LSJ Engineering was commissioned by L&J Contracts of Rayleigh to design, supply and fit a feature steel staircase to a new Harmony flagship store in Oxford Street, central London.
The staircase was to have an industrial look and was designed to fit a budget given to us. We suggested a steel stair and balustrade, all powder coated, with a stainless steel horizontal tensioned wire infill. The finished steel staircase looks fantastic in the finished shop!
Do you require a feature steel staircase such as the one we made for Harmony?
The LSJ Engineering team was appointed by Oktra, an office fit out company, to design, supply and fit a feature staircase for their Berners St project in Westminster, London.
This stair is unusual in that the stair stringers extend to full height to form the balustrades, with handrails fixed to the inside face. The design made the install quite challenging, as the large powder-coated sections had to be manually taken through a double door, around internal doorways and lifted down to basement level. This all had to be done without damaging the finishes…
The area in which the stair was installed was very tight, so we trial erected the stair in our workshop. When we did the trial, we discovered a major problem fitting the treads. In such a small space, this would have stopped the install. As it was, we changed a few design details, and installation went very smoothly and ahead of programme.
Are you looking for a feature steel staircase for your commercial property? Get in touch with LSJ Engineering today!
LSJ Engineering was commissioned by ACAI Group to replace a badly corroded external basement access staircase at their property in Old Burlington St, Mayfair, London.
The existing stair, being probably in excess of 30 years old, did not conform to current regulations and nor could the replacement stair due to the space restrictions. Therefore, permission was granted by Building Control to replace ‘like for like’ in terms of tread goings and risers.
The new stair stringers and balustrade were powder-coated in an external grade finish prior to installment; the treads were hot dip galvanized rather than powder coated for durability.
Are you interested in commissioning a staircase or structural steel work from LSJ Engineering?
We were asked to design, supply and fit a nine story internal fire escape stair in a new building for LTB, who have the contract to refit offices for WeWork.
The stair ran up through voids in the concrete floors which were already formed during the building’s construction. The stair stringers were supported at each level from the floor slabs,that half landings were supported on posts.
A 3D survey was taken ofthe whole stair void area, and we carried out the full design of the stair which had a balustrade with perforated sheet infill panels, all powder coated off site.
The stair stringers were produced by laser cutting them from steel plate in one piece each,this was carried out by Pegasus Profiles, who have CNC machines large enough to do this.
Are you interested in commissioning internal fire escape stairs from LSJ Engineering?
We designed and supplied three acoustic roof plant enclosures by Collins Construction at their Notting Hill Gate project.
The main works were a refurbishment and remodelling of an office and retail space next to Notting Hill Gate station.
The building had two floors added, making it 5 stories high, and new rooftop air handling plant had to be installed bearing onto the CLT roof decking.
LSJ Engineering were commissioned by Collins to design the galvanized steel enclosures that supported and hid the plant. Working as a team with Collins, the M&E supplier, the project architect and the acoustic louver cladding contractor, we carried out a full structural design to achieve this.
The particular challenge was supporting the plant enclosures on a timber CLT roof deck. We achieved this by introducing steel spreader beams that spanned the existing steel structure below the roof deck and built the structures onto these.
Each enclosure was sited on a different roof area and level of the building, we used a City Lifting 5 axle Spiering mobile tower crane to reach the different areas, deliver and erect the structures,which weighed between 5 and 10 tonnes in total.
We were then asked to replace an existing ground floor bin store palisade fence enclosure using similar details, but as there was no requirement for acoustic louvers, only visual ones to screen the area, we supplied and fitted these in powder coated aluminium. Spreader beams at base level were still required because the mains services running below the existing concrete slab made digging foundations risky.