File:The street railway review (1891) (14736882136).jpg

Identifier: streetrailwayrev07amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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rior andbetter class of work achieved if the brick are made to spec-ially shaped templets for the different sections; greaterstrength through better bond and a mere economical use ofmaterials, both brick and cement mortar, are gained, with agreater saving of labor in cutting brick. There will be no necessity of using fire brick for the insideflue as it is not to be expected that the temperature or gaseswithin the chimney will go beyond 500° to 600° F., whichis a temperature not injurious to a good, sound and well burntbrick of ordinary clav. For inside, as well as for outsidework, the brick should be laid in cement mortar. The useof lime mortar is objectionable for the inside on account oflime being readily attacked and crumbled away through theconstant exposure to sulphurous vapors from the fuel. Thereis no fear that the cement will be injured at so low a temper-ature as that prevailmg in the chimney. We show in Fig. VI, diagrams which will illustrate that (^tiecty\ailAVa)rli^^ 178
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174 (^lacetff^mWayS^eylW* the form of the lirick, whether it be key form or eirele brick,may be so determined that not very many different shapesarc necessary. If too many forms were chosen there wouldprobably be confusion in their use. At A we give the twosizes of key form and of circle brick that will be requiredfor the inner flue, while at B the wider circles are shown forthe outside walls. From the respective circles it may beinferred that two different shapes of key form and one forcircle brick will be sufficient to meet the requirements ofobtaining good bonds. In order to obtain the quantity of brick reciuired for theerection of the chimney, we have to calculate the contents ofthe flues, together with those of the cap. We treat, for thesake of convenience and of more quickl)- getting a result,which will suffice for our purpose, the different sections, notas truncated cones, but as so many cylinders, and calculatingthe sectional area of each division, multiply the same by theheig

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