Author: Stewart, S A
First published: N/A
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Stewart, S A
In an earlier paper on "The Effect of Lateral Reinforcement in Reinforced Concrete Columns,” published in the July issue of THE STRUCTURAL ENGINEER, the results of a series of tests on small columns with varying reinforcement were analysed, and a formula evolved which fitted the observed values of ultimate load on the columns within 4 per cent. The columns from which the formula was derived were a standard size, 11.7 in. long X 3.5 in. square, having longitudinal bars, four in number, arranged as a square of overall dimensions 2.5 in. X 2.5 in., and binders of the same internal dimension. Working with a concrete giving a cube strength on 4 in. cubes at 28 days of about 4,000 Ibs. per sq. in., and a range of longitudinal steel from 1/2 in. bars to zero, with binders of pitches from 3/4 in. to 11 1/2 in. of 14 to 4 gauge bright drawn wire, the formula evolved was:
Ultimate Load = A.w + B.x + C.y + D.z
Jeffrey William Hitchen King
In the design of Rigid Jointed Frames of which 2-Pin Ridged Roof Frames form an important part, there are two methods that are in common use by the designer. The methods referred to are:
(1) The Tabular Strain Energy method.
(2) The method of Distributing Fixed End Moments, by Prof. Hardy Cross
The Institution, most particularly the Scottish Branch, has sustained a great loss in the death, on the 24th September, 1946, of Mr. John Thomson, M.B.E., J.P., B.Sc., M.I.C.E. (Member).