1st January 1923
First published: 1st January 1923
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In calculating the strength of plated rolled or built up sections it is usual first to
calculate the moment of inertia about the neutral axis and then divide by the distance
of the neutral axis from the extreme fibre.
The subject of this paper is the strength of rectangular slabs, but it is limited to such slabs as have an appreciable thickness coinpared with the span, and more particularly it is limited to slabs of reinforced concrete only.
The following article is the outcome of an argument in which the writer contended, (and subsequentlv proved by experiment) that, with less than half-an-hour’s explanation, he could get boys of fourteen to draw, as quickly as experts, bending moment diagrams for beams subject to moving to centrated loads. An engineer’s time should be too valuable for such work, which should come within the province of the ofice boy.