Doors and Safety Devices
The doors and safety devices that protect passengers and mechanics, and how to adjust, test and repair them, followed through Northcrest Elevator's Vancouver jobs: door hazards, door operators and motion profiles, car and hoistway doors and hangers, interlocks, car door contacts and restrictors, closing force and kinetic energy limits and reopening devices, door overhauls, speed governors, car and counterweight safeties, ascending car overspeed and unintended movement protection, terminal stopping devices and buffers, firefighters' switches, emergency communications and lighting, and a capstone five-year safety test and door entrapment call, with CSA B44 and Technical Safety BC requirements throughout.
ELV-320 12 lessons · 4 h 13 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
- Explain why doors cause most elevator callbacks and many serious accidents, describe the door system and its arrangements, and apply safe work practices at hoistway doors
- Describe how resistor-and-cam and closed-loop door operators work, calculate door cycle times, and set dwell, nudging and hall call notification times within accessibility rules
- Identify and check the parts of car and hoistway doors, including hangers, up-thrust rollers, gibs, sills, closers and relating cables, and keep entrance fire ratings intact
- Explain how interlocks, car door contacts and restrictors work and what the code requires of them, locate an open lock, and use door bypass switches instead of jumpers
- Apply the code's closing force and kinetic energy limits, calculate minimum closing times from door mass, and test reopening devices, nudging and door data plates
- Carry out a door overhaul in the correct order, survey clutch and roller clearances, adjust operators, test and record the work, and trend door faults
- Explain how speed governors detect overspeed, check tripping and switch speeds against the code table, and test governor ropes, tension sheaves and pull-through
- Describe Type A, B and C safeties and counterweight safeties, calculate stopping deceleration and energy, and carry out, reset and record safety tests
- Explain ascending car overspeed and unintended movement protection, the emergency brakes that provide them, brake monitoring, and the alterations that trigger them
- Explain normal, emergency and final terminal stopping devices and spring and oil buffers, calculate buffer strokes and runby, and test terminal devices and buffers
- Identify and test firefighters' key switches, the in-car panel and signals, fire alarm inputs, emergency communications and car emergency lighting
- Plan and carry out five-year safety device tests and respond to a door entrapment, choosing the rescue method, fixing the cause, testing and reporting
Course content
12 lessons · 4 h 13 min total · final exam
- 1 Elevator doors and why they cause most incidents 21 min · quiz
- 2 Door operators and door motion 22 min · quiz
- 3 Car doors, hoistway doors and hangers 21 min · quiz
- 4 Interlocks, door contacts and restrictors 21 min · quiz
- 5 Door protection: edges, light curtains and kinetic energy 20 min · quiz
- 6 Door adjustment and maintenance 20 min · quiz
- 7 Governors and governor ropes 21 min · quiz
- 8 Car and counterweight safeties 21 min · quiz
- 9 Ascending car overspeed and unintended movement devices 21 min · quiz
- 10 Final limits, terminal stopping and buffers 20 min · quiz
- 11 Emergency devices: firefighter switches, communications and lighting 22 min · quiz
- 12 Capstone: a safety device test and a door entrapment call 23 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
The doors and safety devices that protect passengers and mechanics, and how to adjust, test and repair them, followed through Northcrest Elevator's Vancouver jobs: door hazards, door operators and motion profiles, car and hoistway doors and hangers, interlocks, car door contacts and restrictors, closing force and kinetic energy limits and reopening devices, door overhauls, speed governors, car and counterweight safeties, ascending car overspeed and unintended movement protection, terminal stopping devices and buffers, firefighters' switches, emergency communications and lighting, and a capstone five-year safety test and door entrapment call, with CSA B44 and Technical Safety BC requirements throughout.