Escalators and Moving Walks

How escalators and moving walks are built, installed, maintained, tested and repaired, followed through Northcrest Elevator's Vancouver work at a shopping mall, a transit station and an airport: the truss, tracks and structure, drive machines, gearboxes and drive chains, step chains, steps and pallets, handrails and their drives, combs, skirts and landing areas, the safety devices, brakes and stopping limits, controls and energy-saving operation, installation and commissioning, maintenance, lubrication and periodic tests, and a capstone skirt incident and step chain inspection, with CSA B44 and Technical Safety BC requirements throughout.

ELV-330 12 lessons · 4 h 9 min ▶ Video lessons coming soon

Offered by HSM University · Elevators

This is the Canadian version of this course. See the American version.

What you'll learn

Describe the parts of escalators and moving walks, the code sections that govern them, their passenger hazards, and safe work practices for barricading, lockout and work in the truss
Explain the truss, its supports and seismic restraints, the track system and transitions, and calculate the geometry of an escalator from its rise and inclination
Describe drive machines, gearboxes, main drive chains and the main drive shaft, estimate motor power and drive ratios, and diagnose drive noises
Explain step chains, tension carriages, steps and pallets, measure chain elongation, and inspect and replace steps and rollers safely
Explain handrail construction and drives, check handrail speed against the step speed, find the causes of slip, and test handrail inlet devices
Inspect combs, landing plates, safety zones and skirts, measure loaded gaps and skirt friction, and interpret the step and skirt performance index
Identify the safety devices on escalators and moving walks, explain what each detects and how it resets, and use fault logs and device tests to find causes
Explain machine and auxiliary brakes, apply the code's stopping and deceleration requirements, estimate brake torque, and carry out and interpret brake tests
Explain escalator controllers, starting methods, inspection operation and energy-saving modes, and estimate the energy saved under different operating modes
Follow an escalator installation from survey to handover, level and align a truss, run in and adjust a new unit, and prepare for and pass acceptance tests
Apply a maintenance control program, carry out routine maintenance, lubrication and cleaning, schedule periodic tests and keep complete records
Investigate an entrapment incident and a chain wear problem, correct and prove the causes, plan a step chain replacement and write clear reports

Course content

12 lessons · 4 h 9 min total · final exam

1 Escalators and moving walks in buildings 22 min · quiz
2 Truss, tracks and the escalator structure 20 min · quiz
3 Drive machines, gearboxes and main drive chains 21 min · quiz
4 Step chains, steps and pallets 21 min · quiz
5 Handrails and handrail drives 20 min · quiz
6 Combs, skirts and the landing areas 20 min · quiz
7 Escalator safety devices 20 min · quiz
8 Brakes and stopping distances 21 min · quiz
9 Controls, drives and energy-saving operation 20 min · quiz
10 Installation and commissioning 21 min · quiz
11 Maintenance, inspection and lubrication 21 min · quiz
12 Capstone: a skirt obstruction trip and a step chain inspection 22 min · quiz
E Final exam 20 questions

Requirements

ELV-230 Traction Elevators, Machines and Ropes

Recommended background. You can start any course at any time.