Fig. 71.

47. The risers shown in Fig. 70 (l) are for all starters on each floor, and for all intermediate risers. The facias shown in Fig. 70 (m) are at the start of the upper stories, and form a finish from the first tread to the plaster of the ceiling below. The seven risers cast on the facias are shown at (n), and are for the upper landings, and form a finish from the last tread to the under side of the plaster. The top rails, center rails, and bases are shown at (o), (p), (q), (r), and (s); the base (s) finishes the enclosure on the first floor only. The center rails (o) and (p) extend throughout all floors, as do the top rails (q) and (r). The leaves forming the finish, and covering the joints of the transom, center rail, and base rail, are shown at (t). The finish at the base of the angle irons at the first floor is shown at (y) and (z), the latter being the plate which is bolted to the I beams to form the foundation of the enclosure, the four angles at the corner being bolted to these plates. The basket grille which forms the dado of the enclosure is shown at (a), (b), (c), (d), (f), and (g), and the grille-work at (g'), (h), (i), (J), (k), and (/').

48. Fig. 71 (a) shows the strings, enclosure, arch, and riser in detail. The wall string is shown at a, and the well string at b; the frame of the basket grille composed of small angle irons is shown at c, and the center rail at d; the grille frame composed of small angles at e, and the top rail at f. A section of the riser and an elevation of the front of the same are shown at g and h in Fig. 71 (b), and the arch rib at (c).

49. Elevator cars are usually constructed of angle-iron or pipe framework, and filled in with woven-basket and twisted-iron grille-work and scrollwork. The design of the grille-work is usually similar to, if not identical with, the design of the grille of the enclosure, though sometimes certain conditions require a stronger and less elaborate design in one place than in the other.

In Fig. 72 is shown a plan at (a), and a section or interior elevation at (b), of an elevator car, the design of which is simple and inexpensive, while the construction is substantial and serviceable.

The plan (a) shows two recesses at a, in which are located the guides, thus permitting the car to extend the full width of the shaft. The frame of the car is composed mostly of wrought-iron pipe, as shown at b in the plan, between the vertical members of which small channels c are secured to receive the basketwork and grilles. On the inside of the car the guides are covered with sheet-iron dado panels, extending 2 ft. 13 in. above the floor and with a beveled plate-glass mirror from here to the top of the car. The rest of the side walls of the car, with the exception of the door, is composed entirely of grille-work.

50. The dado consists of a simple basketwork of 1 1/2-inch iron straps, spaced 3/4 inch apart and secured by riveting the end of each strap to the leg of a 1-inch angle iron, as shown at f. The space between the dado and the grille-work consists of a sheet-iron panel secured in place by riveting it to the vertical legs of two 1-inch angle irons, which are framed in between the vertical supports.

The grilles forming the upper part of the elevator are composed of 1/2"x3/16" bars d, which are held vertically in place by means of l"x1/4" horizontal rails e, through which the vertical members extend. By arranging the rails in pairs, and keeping their distance apart equal to the spaces between the vertical members, a series of squares is formed, in which rings are inserted, as shown at g, thus bracing the joint and rendering the entire grille stiff and secure. Across the middle of the grille, a series of scroll ornaments relieves the plainness of the panel, while at the same time it gives lateral stiffness to the vertical bars. At the top of the wall panels a scroll design forms a frieze at the ceiling line, and serves to combine the character of the side walls with that of the domed roof. The grilles of the roof are composed of simple twisted strap iron, such as was described in Art. 33, on the sides, and of a more elaborate scrollwork in the angles.

Combined Elevator And Stair Shafts Part 2 181

(a)

Fig. 72.

Combined Elevator And Stair Shafts Part 2 182

Fig. 73.

51. In Fig. 73 (d) is shown a section through the side of the car, illustrating on a larger scale the details of its construction. The rectangular floor frame is composed of 3-inch Z bars, as shown at a, and three thicknesses of wood flooring, lined with a Russia-iron shield b, rest on the lower flange of the Z bar, while the walls of the car are secured to its upper flange. The corner and intermediate supports g, composed of 1 5/16-inch wrought-iron pipe, are secured to the upper flange of the Z bar a at the floor level, and to a 1/4-inch wroiight-iron plate l at the top. This is accomplished by plugging the ends of the pipes with wrought-iron blocks and riveting the blocks in place through the pipe, as shown dotted at c. The ends of the plugging blocks are then cut with a screw thread and the nuts h turned up on them, after their insertion through the flange and plate. Two 1-inch angle irons i form the upper and lower members of the frame for the base and middle rail, as shown, and a 1-inch channel, extending full length of the sides and across the top of each panel, secures the grilles and scrolls in their places. A smaller channel k rests on top of the plate l and receives the lower ends of the vertical members of the roof grille o. At m another channel set vertically receives the upper ends of the vertical members of the roof grille, and also the ends of the straps forming the center ceiling panel shown at l in Fig. 72. The straps of the dome and ceiling grilles are 1/2" x 3/16" iron twisted as shown, and riveted where they cross at j, as described in Art. 33.

52. In Fig. 73 (c) is shown a section through the panel and guide at the side of the car, the line a b being the center line through the guides. The angle irons d are secured to the flange of the Z bar at the bottom and to the 1/4-inch plate at the top by means of small angle-iron knees, and a plate of sheet iron e riveted to the short legs of the angles forms the back of the chase or guide recess. On the inside of the car the mirror is secured against this plate by means of 5/8" X 1/4" angle irons screwed to the chase back with countersunk screw bolts.