Roof support work JLP01_08_060847
COMMONWEALTH INSTITUTE, KENSINGTON HIGH STREET, KENSINGTON AND CHELSEA, GREATER LONDON. Workers inserting a wedge in the timber formwork at the top of a roof support column during construction of the Commonwealth Institute exhibition hall.
Laing built the Commonwealth Institute between October 1960 and October 1962 to replace the former Imperial Institute that was to be demolished to make way for new facilities at Imperial College. The building consisted of a four-storey administrative block housing a library, restaurant, board room and conference hall and a separate two-storey b lock containing a cinema with an art gallery above, but the focus of the project was the exhibition hall with its hyperbolic paraboloid roof, the first of its kind constructed in Great Britain. The exhibition, designed by James Gardner, provided spaces where each of the Commonwealth nations could showcase their achievements and characteristics, primarily to school children as teaching aids to enliven history and geography lessons.
The shell arch of the central roof section was of reinforced concrete, cast in situ using timber formwork with rough sawn boards to provide a textured internal surface whilst the four outer "warps" were constructed using precast beams and wood wool slabs, blocks of shredded timber bound together in a cement paste and left visible from the interior. The entire roof was then clad in copper sheeting over a layer of vermiculite. It covers an area of 33,700sqft, 183 feet square with the central section 93 feet square and ranges between 30ft high at its lowest and 80ft at the peaks
© Historic England Archive
Minaret construction team JLP01_09_753519
London Central Mosque and The Islamic Cultural Centre, Park Road, Regent's Park, City of Westminster, Greater London. The site team at the London Central Mosque stood in front of the minaret on the penultimate day of the slipforming operation.
The minaret of the London Central Mosque was constructed using a slipforming technique, in which concrete is poured into a continuously moving form. The form is raised at a rate that allows the concrete to harden and emerge from the form maintaining its shape. The minaret was formed in two concentric cylinders, with a lift located in the central area and a spiral staircase between the two walls. The concrete for the 43 metre high minaret was poured in 10 days from the 15th - 25th September 1975. The site team worked in 12-hour long day and night shifts, six days a week, to achieve this
© Historic England Archive. John Laing Photographic Collection