149. Double Sliding Doors For Passenger-Elevator Fronts

Buildings not fire-proof having passenger-elevator shafts enclosed in a frame of iron filled with porous terra-cotta blocks, or enclosed in brickwork, have double doors arranged as shown by the following details.

The outer door is constructed of iron, and used at night to prevent the passage of fire from one story to another. The inner door is constructed of wood with glass or grille work, and used during the day.

The jambs for the doors are made of channel iron. In the plan view opposite, C is 6 inches and B 4 inches wide. D is a continuation of saddle (see section, Fig. 2).

In Fig. I the 6-inch jamb is continued over the top of door. A is a small channel with one leg planed for the sheave E to run upon. D is the hanger secured to frame of door. B is a cast-iron moulding which extends overhead and down the 6-inch jamb, acting as a guide for the outer door.

The section of saddle and bottom of both doors is shown in Fig. 2. A is a section through frame of inner door, with a projecting pin H acting as a guide in the groove G. B is a section through frame of outside door, which is made of plain sheet iron (F) and cast-iron moulding (E). The frame can be made into as many panels as desired. The sheave C is secured to the frame by the hanger D (see Fig. 4) and runs upon the projecting lip cast with the saddle.

149 Double Sliding Doors For Passenger Elevator Fr images/ArchitecturalIronAndSteel01 53

To secure the outer door when closed, a slot is cut into the channel jamb as shown in Fig. 3. B is the channel, C the door frame, and A a pin for raising the latch.

To secure the inner door, the same lock and buffer are used as explained for passenger-elevator enclosure.

150. Elevator-Car Guide Supports

Elevator-Car Guide Supports are generally constructed of 6-inch channels if placed on sides of shaft, or of 5 X 5-inch angles if placed in corners, and are continuous from cellar or basement to top of upper story. The wooden guides are secured to the channels and angles by heavy screws placed 2 to 3 feet apart.

When two elevator shafts adjoin each other and the guides are placed on the sides, the supports should be of two channels-placed back to back, with the wooden guides between, and then bolted together by 5/8-inch-diameter bolts three or four feet between centres. To stiffen and support this combination they should rest and be secured to I beams placed in the shaft at each floor level.