Round iron or steel rods, as used in the early days of re-inf or concrete, are now superseded by specially shaped bars, designed to utilise the strength of the metal to the fullest extent and to minimise the quantities of steel and concrete required to secure the necessary factor of safety.
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https://paperspast.natlib.govt.nz/periodicals/P19160601.2.3.3
Bibliographic details
Progress, Volume XI, Issue 10, 1 June 1916, Page 629
Word Count
51Page 629 Advertisement 3 Progress, Volume XI, Issue 10, 1 June 1916, Page 629
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