Fig. 299.—Forms for Curved Concrete Abutments.
Fig. 300.—Cornice Form.
Fig. 301.—Method of Supporting Cornice Form Shown by Fig. 300.
In constructing a concrete facade for a plate girder bridge at St. Louis, Mo., the form shown by Fig. 297 was used. The completed facade is shown by Fig. 298. The ceiling slab was first built and allowed to set and then the forms were erected for the frieze and coping. After these were molded the forms were continued upward as shown for the base of the railing. Above this point the several parts were separately molded as shown by Fig. 285 previously described. Molded in this manner the ceiling cost 25 cts. per sq. ft.; the frieze and coping cost $2 per lin. ft., and the railing base cost 45 cts. per lin. ft. In constructing the concrete abutments of this same structure use was made of the forms shown by Fig. 299. These abutments had curved wing walls and for molding these girts cut to the radii of the curves were fastened to the studs and vertical lagging was nailed to the girts. All the lagging was tongue and groove stuff.
Fig. 302.—Cornice and Balustrade for Arch Bridge.