. Electric railway journal . When complete data upon all of these limiting condi- March 15, 1913.] ELECTRIC RAILWAY JOURNAL 491 lions have been obtained, a careful study should be madeto determine the most economical form of the building andto give a comparison of the costs of the various types ofconstruction in detail. It goes without saying that beforea designer can make such an analysis intelligently hemust not only be capable of designing the several types ofconstruction in detail but by experience and data availablehe must also be able to estimate correctly the market costs These question
. Electric railway journal . When complete data upon all of these limiting condi- March 15, 1913.] ELECTRIC RAILWAY JOURNAL 491 lions have been obtained, a careful study should be madeto determine the most economical form of the building andto give a comparison of the costs of the various types ofconstruction in detail. It goes without saying that beforea designer can make such an analysis intelligently hemust not only be capable of designing the several types ofconstruction in detail but by experience and data availablehe must also be able to estimate correctly the market costs These questions cannot be considered singly, for inmany ways they are interdependent. A type of foundationfor one wall will not always be best for another wall, themost economical form of roof may not lend itself to themost economical type of roof support, and so on throughthe entire design. Each type of foundation, each kind ofwall, every form of roof must be analyzed and designedand costs tabulated so that the designer can select with a. Norfolk Installation—General View of One of the Three-Bay Carhouses, Showing the Unusual but Most Economical Form of Roof and Most Favorable Skylight Arrangement of the various materials and labor and thereby determineaccurately the actual cost of the different parts of thebuildings. To the careful designer a large number ofquestions such as the following immediately arise forinvestigation: Will a short wide building cost more than a long nar-row building? Will a two-track unit or a three-track unit or a four-track unit be most economical? Will a brick foundation, one of concrete or one of stonebe best suited to the needs of the building? Should the walls be constructed of brick, terra-cottablocks, concrete blocks or concrete? Should the roof construction be of structural steel pro- free mind from these tabulations the most economical com-bination which is applicable to the problem in hand. Itwill usually be found that after a careful study is made andth
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