Mobile Scaffold Safety Essentials
The Problem
Mobile scaffolds are convenient and versatile, allowing work to be carried out at multiple locations without dismantling the structure. However, they present unique hazards such as tipping, unsafe movement, or failure to stabilise the platform. If these risks aren’t managed properly, accidents like falls, scaffold collapse, or injuries can occur. Today, we’ll discuss these hazards, Canadian health and safety requirements, and the steps needed to ensure mobile scaffold safety.
Identify the Hazards
- Scaffold Instability: Poor bracing, uneven surfaces, or incorrect overhangs can cause the scaffold to tip or collapse.
- Unsafe Movement: Moving the scaffold while someone is standing on it, pushing it from elevated points, or pulling on surrounding structures increases the risk of tipping.
- Wheel and Caster Issues: Unlocked or unsecured castors can lead to unexpected movement.
- Unsafe Riding Conditions: Riding mobile scaffolds without meeting stability and levelling requirements is dangerous.
Safety Practices and Preventative Measures
Scaffold Stability and Construction
- Use proper bracing (cross, horizontal, or diagonal) to prevent sway or collapse.
- Ensure all vertical supports are plumb, level, and securely fastened.
- Do not allow platforms to extend beyond the base unless stabilised using outriggers.
- Use adjustable base plates or screw jacks for levelling on uneven ground.
Caster and Wheel Safety
- Secure caster stems to scaffold legs with locking pins or other approved devices.
- Always lock wheels when the scaffold is stationary.
Safe Movement of Scaffolds
- Push the scaffold from the base to prevent tipping.
- Avoid pushing from above 1.5 metres (approx. 5 feet).
- NEVER pull on structures like roof framing or joists while on the scaffold.
- Stabilise the scaffold if necessary to prevent tipping during movement.
Rules for Riding on Mobile Scaffolds
Workers may only ride mobile scaffolds when:
- The ground is level (within 3 cm) and free of holes or obstructions.
- The scaffold’s height-to-base ratio is 2:1 or less (or meets applicable provincial stability requirements).
- Outriggers (if required) are installed and extended correctly.
- No part of the scaffold platform extends beyond the base width unless stabilised.
- Everyone on the scaffold is aware that it will be moved.
Common Hazards to Avoid
- Moving scaffolds without locking the wheels.
- Overextending the platform without stabilisation.
- Riding scaffolds without following safe use requirements.
Real-Life Case or Scenario
A worker suffered serious injuries after trying to move a mobile scaffold by pulling on overhead framing while standing on the platform. The scaffold tipped, and the worker fell over 3 metres. This incident could have been avoided by locking the wheels, stabilizing the scaffold, and using correct movement techniques.
Employee Responsibilities
- nspect mobile scaffolds before use to ensure correct bracing and wheel locking.
- Never ride a scaffold during movement unless all safety conditions are met.
- Use safe pushing methods—never pull on structures or overextend platforms.
- Report unsafe conditions or damaged scaffolds immediately.
Employer Responsibilities
- Provide compliant mobile scaffolds with proper bracing and locking devices.
- Train workers on scaffold stability, safe movement, and riding requirements.
- Carry out regular inspections and remove unsafe equipment from service.
Discussion & Questions
- "What issues have you come across when working with mobile scaffolds?"
- "How do you make sure your scaffold is stable before using it?"
Encourage workers to share tips or raise concerns.
Commitment/Action Plan
Let’s commit to inspecting and stabilizing all mobile scaffolds before use. Starting today, take a few minutes to ensure wheels are locked and scaffolds are safe to move. These checks can prevent serious injuries.
Wrap-Up
Mobile scaffolds are great tools—but only when used correctly. Following Canadian occupational health and safety guidelines and using safe work practices helps us eliminate risks. Thanks for putting safety first.
Standards Overview
Canadian occupational health and safety regulations require that:
- Mobile scaffolds must be constructed and used according to the manufacturer’s instructions and industry best practices.
- Scaffolds must be properly braced, stable, and used on level ground.
- Workers must not move scaffolds while on them unless specific safety criteria are met.
- Fall protection, guardrails, and proper access are required depending on the height and task.
Disclaimer
“The information provided in this toolbox talk is intended for informational and educational purposes only. It is not a substitute for professional legal, safety, or regulatory advice. The content reflects general best practices and industry standards but may not be applicable to all workplace environments or jurisdictions.
It is the responsibility of employers, supervisors, and workers to ensure compliance with applicable federal, provincial, and territorial laws, regulations, and standards, including but not limited to those set by the Canadian Centre for Occupational Health and Safety (CCOHS) and relevant provincial occupational health and safety authorities. Site App Pro, its affiliates, agents, or representatives—as well as the authors, presenters, and distributors of this toolbox talk—assume no liability for the use or application of the information provided.
Participants are strongly encouraged to consult appropriate legal, safety, or regulatory professionals regarding specific workplace concerns or questions. Always adhere to your organisation’s policies and procedures for health and safety and hazard management.
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