Iron ores, salt and sandstones . Plate XXIV.—A.—Residual Pyramids after Crushing Tests on WestVirginia Plate XXIV.—B.—Apparatus for Determining Compressive ElasticProperties of West Virginia Sandstone at the U. S. Arsenal. r-9 WEST VIRGINIA GEOLOGICAL SURVEY. 541 If the factor of safety be taken as 20 times the pressure towhich the stone is actually subjected, the stone at the base ofthis monument should withstand a pressure of 6,292 poundsper square Most buildings are of far less height, so the requiredpressure would be much smaller. Buckley estimates themaximum pressure i


Iron ores, salt and sandstones . Plate XXIV.—A.—Residual Pyramids after Crushing Tests on WestVirginia Plate XXIV.—B.—Apparatus for Determining Compressive ElasticProperties of West Virginia Sandstone at the U. S. Arsenal. r-9 WEST VIRGINIA GEOLOGICAL SURVEY. 541 If the factor of safety be taken as 20 times the pressure towhich the stone is actually subjected, the stone at the base ofthis monument should withstand a pressure of 6,292 poundsper square Most buildings are of far less height, so the requiredpressure would be much smaller. Buckley estimates themaximum pressure in ordinary buildings as about to the square inch or with the above factor of safetywould require a crushing strength of 3,146 pounds to thesquare inch; or taking into consideration, unequal pressureand strains, he regards 5,000 pounds to the square inch assufficient for all ordinary buildings. As shown by tests 5,000pounds to square inch would be a low strem th for mostbuilding stones. For the compression tests, four inch cubes were dressedsmooth at the quarry and the work completed on a rubbin


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Keywords: ., bookcentury1900, bookdecade1900, bookpublishermo, booksubjectsalt