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.


Bolster: Two channels running horizontally between the two vertical stiles. The bolsters are on the very bottom of the sling. The main purpose of the bolsters is to support the platform. Also, the bolsters serve as attachment points for the strike plates and bottom guides.

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