One photograph of a 74-ton steel plate girder. Caption on back reads: 'A 74-ton mild steel plate girder is to be incorporated into a development being built by Richard Costain (Construction) Limited for Hallmark Securities Ltd. At St. Martin’s Lane, London … The girder, 19 ft. 6 ins. High by 77 ft. 6 ins. Long is thought to be the largest used for building construction in this country. … Together with four 19 ft high by 65 ft 6 ins long Vierendeel girders of high-yield steel, each weighing 62 tons, the girder will carry a six-storey reinforced concrete block of shops and offices over the auditorium of a Rank’s basement cinema. The steelwork is by Somerfelds Ltd. With Vickers Ltd, Shipbuilding Group, and Carter Horseley (Engineers) Ltd. As sub-contractors'.