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The Structural Engineer, Volume 8, Issue 1, 1930
In single storey buildings of the shed type, the vertical loads on the columns are generally small, while the overturning moments clue to wind forces are relatively large. The stability moments are supplied in one of three ways:- (l) by means of a portal frame such as a knee braced truss with the bases of the columns considered as being hinged. (2) by means of a portal frame with fixed bases to the columns. (3) by means of fixed beams to the columns, the connections of tile roof trusses to the columns being considered hinged. In methods (2) and (3) the design of the steel bases and the concrete foundations is all important, and it is the purpose of this article to deal with the design of the type of symmetrical base and foundation in common use. G J Voce
THE CHAIRMAN (Mr. H. J. Deane, Past President) said he might possibly add to what Mr. Burns had said in connection with “ slump,’’ referred to on page 440. Some might wonder why the engineers carrying out this work should have made a point of having this slump taken, but Mr. Burns, quite rightly, had not mentioned the question of specification. He had been dealing solely with the difficulties and intricacies of foundations which were rather out of the ordinary. I n order, however, to obtain satisfactory results, bearing in mind the fact that the Contractors desired to use chutes for placing the concrete, one had to arrange a specification which would meet these conditions, and at the same time give the amount of strength that was necessary for the work in general.
Sir,- Is there not a demand for a publication of steel details for buildings only(apart from other engineering practice), say a series of loose sheets in, a small portfolio?-taken from drawings with few photographic reproductions and following up-to-date conditions, standardised as much as possible and very little letter press; also dealing with roofs of all types and spans to 100 ft., floors, girders, theatrical conditions, frame buildings, etc., on the lines of the “Practical Exemplar of Architecture,” by Mervyn McCartney.