| Purpose |
Protecting Workers from injuries associated with the installation of wooden roof trusses on single family and multi-family units. |
| Definition |
A wooden roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. Trusses usually occur at regular intervals, linked by longitudinal timbers such as purlins. The space between each truss is known as a bay. |
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Potential Hazards
This list of potential hazards is not comprehensive. Workers are required to complete a Hazard Assessment prior to starting this task to ensure all hazards are identified and controlled.
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- Slips, trips
- Fall hazard
- Sprains and strains
- Falling objects
- Heavy lifting
- Weather conditions
- Flying debris
- Pinch points
- Lacerations, bruises
- Overhead lift (crane use)
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| Protective Mechanisms |
- Emergency Response Plan (ERP)
- Fall Protection Plan
- Hazard assessment
- Personal Protective Equipment (PPE) such as hardhat, boots, eye protection, hearing protection, including Specialized PPE harness, anchor point, rope grab or self-retracting lifeline
- Barricades and warning signs
- Designated Control Zone
- Proper lifting techniques
- Proper clothing for weather conditions
- Use of a tagline to control when guiding a suspended load into position
- Weather-monitoring apps for mobile devices that communicate Emergency Weather Alerts
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| Work Site Supervisory Responsibility |
Do
- Conduct a hazard assessment for fall protection and hazards associated with working at heights.
- Ensure that all tools and equipment are in good working condition.
- Correct unsafe acts and conditions immediately.
- Instruct Workers to install work platforms / scaffolding prior to installing trusses.
- Ensure rigging is completed by a trained Worker who is deemed competent to lift any heavier items while installing.
Do not
- Allow Workers to work at heights if they are not trained in the safe use of fall protection systems.
- Allow work to proceed if wind speeds exceed 40 km/h / 25 mph.
- Allow Workers to stand on the top plate.
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| Worker Responsibility |
Do
- Be trained in and understand the Fall Protection Plan.
- Tie off by use of temporary roof anchors / roof straps. Ensure roof trusses are properly secured before utilizing them for roof anchor straps.
- Use ladders from the inside whenever possible.
- Work safely and encourage co-Workers to do the same.
- Use all required PPE and clothing.
- Ensure proper control zones below are in place if needed.
- Communicate to all parties affected by the operations.
- Ensure that the materials are properly secure to the equipment and communicate properly with the equipment operator when hoisting up to the roof level.
- Follow site-specific drawings / specifications.
- Correct any unsafe conditions or immediately report them to the supervisor.
- Immediately report any injury to a first aid attendant or Supervisor / Superintendent.
Do not
- Use fall protection equipment if you are not trained and competent in its use.
- Continue work if wind speeds exceed 40 km/h / 25 mph.
- Stand on the top plate of exterior walls.
- Hesitate to ask questions or discuss safety concerns with their supervisor.
- Walk under live loads
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