. The Locomotive . essity for a smooth finish nor does it matter ifthe forms bulge slightly so that the sides of the foundation do not forma plane surface. With foundations that are visible, however, attentionmust be given to these details. In such cases care must be taken tosee that the surfaces of the boards in contact with the concrete areplaned and smooth unless, of course, a cement plaster finish is to begiven later. It is well also to use lYi. or 2 planking and to pay someextra attention to the bracing so that true surfaces will be obtaining of a good finish will be discusse
. The Locomotive . essity for a smooth finish nor does it matter ifthe forms bulge slightly so that the sides of the foundation do not forma plane surface. With foundations that are visible, however, attentionmust be given to these details. In such cases care must be taken tosee that the surfaces of the boards in contact with the concrete areplaned and smooth unless, of course, a cement plaster finish is to begiven later. It is well also to use lYi. or 2 planking and to pay someextra attention to the bracing so that true surfaces will be obtaining of a good finish will be discussed a little later. When the sides of the foundation form have been constructed theymay be placed in position and fastened together as shown in Fig. sides should be made square with each other and then braced inthat position with boards laid diagonally across and fastened to thetop of the form. Lines should be run across the top of the form toindicate the center lines of the shaft and the cylinder, and the form. Fig. 5. 1921.] THE LOCOMOTIVE. 169 should then be placed accurately in position by reference to theselines and securely held in this position. The engine, when it is seton the foundation, is not to rest upon the concrete itself but willhave, between it and the concrete, a bed of cement grout (equal partsof sand and cement, about one-half inch thick. This method of settingin grout insures the accurate placing of the engine and at the same timeprovides a full and even bearing for the engine bed-plate. Whenplacing the foundation forms, therefore, it is well to have the topedge of the sides straight and level and located one-half inch below thelevel that the bed plate of the engine is to assume. The form isthen filled with the concrete to the point of overflowing. The next step isto support theholding - down orfoundation bolts inthe proper positionin the foundationopening. To dothis a template,such as that shownin Fig. 7, on page170, is necessary. The center lines ofthe
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