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The Structural Engineer, Volume 52, Issue 9, 1974
On 20 July last, under ref. BRA/1068/2, the DOE addressed the letter given below to local authorities, new town development corporations, etc. The letter contains an assessment of the BRE Report on the failure of roof beams at Sir John Cass's Foundation and Red Coat Church of England Secondary School, Stepney, and sets out a programme of action for inspection and assessment. Attached to the letter was an annex 'Suggestions for testing high alumina cement concrete' which is published on page 326.
Mr. B. Rhodes: Mr. Longbottom has done less than justice to large diameter strand, by which I mean 28 mm (1 1/8 in) diameter strand. I know it is not used a lot, but this is really because of lack of effort on the part of the manufacturers and the system suppliers. 28 mm diameter strand has certain basic drawbacks, namely: 1. The shape of the load/extension curve 2. Relaxation losses at 6 per cent 3. Lower grip efficiencies 4. The tendency to fly open when cut 5. The 'banana' effect at the ends
By any standards bomb damage is a messy business. Even when considered by the structural engineer back in his office and away from the debris and the broken glass, it is untidy and presents problems that are far different from those entailed in the design of new works. Peter S. Rhodes