Austin Young, our Structural Design Engineer, has put a spotlight on the self-supporting steel staircase we’ve designed for 40 Broadway, the 115,000 sq. ft commercial scheme in St James’s Park, Westminster:
Walking out of St. James Park Underground Station into the spacious reception of 40 Broadway will be a visual delight thanks to the stunning double height lobby and self-supporting steel staircase flowing from ground to first floor. Designed as an eye-catching feature, steel stringers will act as both the structural framework and the architectural balustrade for this sculpture-like stairway.
Creating the conceptual design
Due to the structure being exposed, it has been conceptually designed in a way that suits architectural constraints. The completed look is a supple, continuous ‘ribbon’. However, being too large to be brought to site in one piece, it has been designed as two seamless segments. Final assembly will be on site with welded joints, while the connections will be full penetration prepped butt welds. These are to be cut down and then coated in the desired finish to give the effect of this continuous strip of metal. Midway, a refuge area will be concealed within the depth of the stringer, appearing as though there is a constant incline from the outside.