Building Construction and Superintendence, Part 1W.T. Comstock Company, 1909 - Building |
Other editions - View all
Common terms and phrases
12 inches architect ashlar blocks bond bottom brick walls bricks brickwork building stones built caisson cent clay color columns compressive cornices County course crete cubic cubic foot depth dolomite durable excavation face-bricks feet filled fire-proof flat Floor Arch floor construction girders gneiss granite gravel gray grillage hydraulic hydraulic limes I-beams inches inches thick iron joints kilns laid lath less lime mortar limestone lintel load manufacture marble masonry material metal method mixed molded natural cement partitions pieces piers piles plaster Portland cement mortar pounds per square pressure proportion quarries reinforced concrete rock rods roof sand sandstone shown in Fig shows silica slaked slate soffit soft soil span square foot square inch steel beams stonework strength supported surface tensile tensile strength terra-cotta tests tiles timber tion tons per square usually voussoirs weight width wire York
Popular passages
Page 174 - Pats of neat cement about three inches in diameter, one-half inch thick at the center, and tapering to a thin edge, shall be kept in moist air for a period of twenty-four hours.
Page 155 - All tests shall be made in accordance with the methods proposed by the Committee on Uniform Tests of Cement...
Page 178 - F. as practicable, and observed at intervals for at least 28 days. (c) A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel for five hours. These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking, or disintegrating.
Page 847 - A cement may be rejected in case it fails to meet any of the above requirements. An agent of the contractor may be present at the making of the tests, or, in case of the failure of any of them, they may be repeated in his presence.
Page 212 - For convenience all minerals are referred to a scale of hardness of ten units, composed of common or well known minerals, which are as follows: (1) talc; (2) gypsum; (3) calcite; (4) fluorite; (5) apatite; (6) orthoclase; (7) quartz; (8) topaz; (9) sapphire; and (10) diamond.
Page 156 - These pats are observed at intervals for at least 28 days, and, to satisfactorily pass the tests, should remain firm and hard and show no signs of distortion, checking, cracking or disintegrating.
Page 864 - This certificate of approval will not remain in force for more than four months, unless there be filed with the bureau of building inspection, at least once every four months following, a certificate from some reliable physical testing laboratory showing that the average of...
Page 178 - The minimum requirements for tensile strength for briquettes one inch square in section shall be within the following limits, and shall show no retrogression in strength within the periods specified: ' Age Neat Cement Strength 24 hours in moist air 150 — 200 Ibs.
Page 155 - It shall develop initial set in not less than ten minutes, and hard set in not less than thirty minutes, nor more than three hours.
Page 162 - By a Portland cement is meant the product obtained from the heating or calcining up to incipient fusion of intimate mixtures, either natural or artificial, or argillaceous with calcareous substances, the calcined product to contain at least 1.7 times as much of lime, by weight, as of the materials which give the lime its hydraulic properties, and to be finely pulverized after said calcination, and thereafter additions or substitution! for the purpose only of regulating certain properties of technical...