The Structural Engineer > Archive > Volume 24 (1946) > Issues > Issue 11 > Further Notes on Reinforced Concrete Columns
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Further Notes on Reinforced Concrete Columns

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

Author(s): King, Jeffrey William Hitchen