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Discussion

The Chairman sketched a section of the building referred to in the paper 50 ft. wide and 500 ft. high - and said that when one divided that into 35 stories one would appreciate the importance of what had been said about joints. Perhaps the author had not emphasised as strongly as he might have done what really happened as the result of wind pressure, and the Chairman drew curves illustrating the bending which would occur at the various heights in such a building. What happened at the top level, he said, depended upon the rigidity of the structure at the roof - whether one used a truss or a girder. If a girder were used, the effect of wind pressure was to reduce bending similar to that which occurred at the lower levels.