File:A practical treatise on natural and artificial concrete; its varieties and constructive adaptations (1879) (14740879026).jpg

Identifier: practicaltreatis00reid (find matches)
Title: A practical treatise on natural and artificial concrete; its varieties and constructive adaptations
Year: 1879 (1870s)
Authors: Reid, Henry
Subjects: Concrete
Publisher: London, New York, E.& F.N. Spon
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

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Text Appearing Before Image:
Mr. Hornblower. The primary object of this invention is the combination ofiron, terra-cotta, or fireclay tiles, with cement concrete, so asto secure strength and complete immunity from the dangersof fire. A reference to Fig. 47 shows the floor adaptation ofthis system of fireproof construction. These are two trans-verse sections showing the relative positions of the variousmaterials, and the judicious disposal of the iron ingredient,so as to ensure its protection from the damaging influence ofthe highest temperatures, being enclosed in a fireclay tubeor tile, and bedded in concrete. In the floor represented by the upper section, the rollediron joists are placed 2 feet apart, the intermediate spacesbeing filled up with hollow fireclay tubes of a wedge shape,the upper or floor portion being covered by Portland cementconcrete. By this arrangement there are three combinedelements of strength, namely, the iron, the fireclay tube, andthe concrete, either of which in proper proportions would
Text Appearing After Image:
280 A PRACTICAL TREATISE ON CONCRETE. provide a floor more or less suited for ordinary purposes.The floor, according to this design, is 9 inches deep, a largeproportion of which is hollow. The weight of this floor is6J cwt. per square yard of floor surface, and is capable ofsustaining a weight of 25 cwt. per square yard, with a 16-feetbearing. The upper and under faces of the tubes are corrugatedso as to bond with the concrete of the floor, or the plaster ofthe ceiling. The lower illustration shows transverse sectionof a floor capable of sustaining greater weight than thatshown in the upper one. The rolled iron joists are 2 feet 2 inches apart, the tilesbeing of a slightly varied form and 12 inches in depth.Such a floor weighs 7 cwt. per square yard, and is capable ofsustaining a weight of 2 tons per square yard with an 18-feetbearing. A careful examination of the sketch will show that a floorso constructed, while securing the maximum quality ofstrength, at the same time protects its

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