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THE reasons leading to the choice of the structure here shown arose as follows: A public building had been erected containing a cinema hall 20 metres long by 16 metres
wide, the walls of which had already reached roof level when the work was taken over. The original design provided for reinforced concrete beams in a general way, but as the use of intermediate columns was inadmissible, it was found that a simple beam arrangement spanning the 16 metre opening and carrying the ceiling as well as the roof
would prove to be extremely heavy, unsightly and uneconomical. A considerable quantity of cement, 20 mm., 16 mm., and 8 mm. diam. reinforcing steel had already arrived on the site and, the Season being well advanced in a locality of severe winters, work had to be begun without delay; all these reasons limiting the choice of material to reinforced concrete.
IN the romance of Ancient History, mention is made about a certain Philonicus who offered for sale, to Phillip, a horse, vicious, and Posessing a great temper. The story continues that Phillip was displeased, but that a young man named Alexander, who had witnessed the unavailing efforts of the groomsman, exclaimed: "What a horse they are losing, for want of skill and spirit to manage him !"
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