oa Civil Engineering = Siviele Ingenieurswese - The use of timber as reinforcement for concrete beams
This paper descriptionbes experiments carried out in the Union of South Africa during the War with the object of determining whether timber-reinforced concrete beams could be satisfactorily used as an emergency method of construction. The results are given of a series of tests for tensile strength and elastic modulus made on a number of species of locally-grown eucalypts, pines and acacias. Both clear specimens and specimens containing knots were tested; the decrease in tensile strength due to knots was found to be approximately proportional to the sectional area of the knots.
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