Classroom on demand

Welcome to Classroom on demand, your source for educational materials related to the vertical transportation industry. This site represents the knowledge and expertise of the best engineers and mechanics in the elevator industry, and will help those new to the elevator industry learn about the basic workings of elevator systems, and also will serve as a reference for people with more experience.

Rail Module

The rail module contains the guide rails (typically 16 feet long).
Conventional “T” rails come in various sizes which are specified as pounds per foot of rail. Industry standard rail sizes are 8, 15, 18.5, 22.5, and 30 pound rail.
The rail module also includes splice plates on Omega Rails and Fishplates on “T” rails with the nuts and bolts that are used to connect multiple rails together.
Traction elevators use two sets of guide rails. The rails to guide the elevator car are called main rails. The rails to guide the counterweight are called counterweight rails. For a typical traction passenger elevator the main rails are sized as 15 pound rails and the counterweights are sized as 8 pound rails. Rail sizes will increase as elevator capacity increases.
Since the traction elevator is required to use a rail safety to prevent a free falling car, the plain steel “T” rails that provide a safety shoe griping surface are used.
Hoistway width space must allow enough room for the main rails and rail brackets. For the typical traction elevator a minimum space of 8” on each side of the platform is provided. For the counterweight, a minimum space of about 1’-1” is provided for the typical passenger elevator between the rear hoistway wall and the car platform. For larger engineered applications a larger space may be required

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