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Ferro-Concrete Sections

On pages 532 and 533 we publish a chart of Ferro-Concrete Sections, by Mr. A. D. Turner, which shows in a compact form the principles of calculation of all ordinary ferro-concrete members, including the complexities of bending plus compression. A point in connection with this contribution is that in case VI, the author appears to ignore the movement of the neutral axis which takes place when steel is introduced for taking compression stresses. This is done in other authoritative methods of calculation, and the error introduced in most cases is small and may be ignored without substantial error. It should be noted, however, that in special cases it might require further investigation.