Une ouverture de 350 mm doit on gérer le risque de chute

Fall Protection Measures for a 350 mm Opening =============================================

This document outlines the required fall protection measures and risk mitigation strategies for a 350 mm opening to prevent falls from height, in compliance with safety regulations and industry best practices. Fall protection is crucial when working at heights to prevent serious injuries and fatalities. A 350 mm opening presents a significant fall hazard and requires appropriate measures to ensure worker safety.

Hazard Assessment

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Before commencing any work near the 350 mm opening, a thorough hazard assessment must be conducted to identify all potential fall hazards and evaluate the associated risks. This assessment should consider the height of the opening above a lower level, the frequency of access to the area, and the presence of any other potential hazards in the vicinity.

Areas to examine during a hazard assessment for fall protection include:

• Areas where people may fall during expected tasks.
• Areas where workers might fall from a height of 3 m (10 ft) or more, or from lesser heights where increased risk of injury exists.
• Situations where workers could fall into operating machinery, water, hazardous substances, or through an opening in a work surface.
• The presence and effectiveness of existing controls to eliminate or reduce the likelihood of falls.
• Whether workers are trained to recognize and report new or previously unrecognized fall hazards.
• Worker understanding of protective measures like guardrails and safety nets.
• The condition and stability of equipment, including guardrails, ladders, and scaffolding.
• The cleanliness and dryness of work area floors.
• Whether workers are educated and trained to safely use protective equipment.
• The availability and condition of required personal protective equipment (PPE), and whether it is used as instructed.

Fall Protection Measures

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Based on the hazard assessment, implement one or more of the following fall protection measures to adequately protect workers from the 350 mm opening. The selection of the appropriate measure(s) will depend on the specific circumstances of the work environment.

Covers

Using covers is a primary method of protecting workers from falling through openings. Covers should meet specific requirements to ensure their effectiveness:

• Covers must be capable of supporting, without failure, at least twice the weight of employees, equipment, and materials that may be imposed on the cover at any one time.
• Covers must be secured to prevent accidental displacement by wind, equipment, or employees.
• Covers must be color-coded or marked with the word "HOLE" or "COVER" to provide warning of the hazard.

Guardrail Systems

Guardrail systems are another effective means of preventing falls through openings. Key requirements for guardrail systems include:

• Top edge height of top rails must be 42 inches (1\.1 m) plus or minus 3 inches (8 cm) above the walking/working level.
• Midrails, screens, mesh, intermediate vertical members, or equivalent intermediate structural members must be installed between the top edge of the guardrail system and the walking/working surface when there is no wall or parapet wall at least 21 inches (53 cm) high.
• Guardrail systems must be capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied within 2 inches (5\.1 cm) of the top edge, in any outward or downward direction, at any point along the top edge.
• The system must be surfaced to prevent injury to an employee from punctures or lacerations, and to prevent snagging of clothing.
• When the systems are used around holes, they must be installed on all unprotected sides or edges of the hole.

Safety Net Systems

Safety net systems can be used to catch workers in the event of a fall. Important considerations for safety net systems include:

• Nets should be installed as close as practicable under the walking/working surface on which employees are working, but in no case more than 30 feet (9\.1 m) below such level.
• Nets should extend outward from the outermost projection of the work surface according to specified distances based on the vertical distance from the working level to the horizontal plane of the net.
• Nets should be installed with sufficient clearance under them to prevent contact with the surface or structures below when subjected to an impact force.
• Nets and their installations should be capable of absorbing an impact force equal to that produced by a specified drop test.
• Nets should be inspected at least once a week for wear, damage, and other deterioration. Defective components should be removed from service.
• The maximum size of each safety net mesh opening should not exceed 36 square inches (230 cm) nor be longer than 6 inches (15 cm) on any side.

Personal Fall Arrest Systems

Personal fall arrest systems (PFAS) can be used to protect workers from falls. Key components and requirements include:

• Connectors shall be drop forged, pressed or formed steel, or made of equivalent materials.
• Connectors shall have a corrosion-resistant finish, and all surfaces and edges shall be smooth to prevent damage to interfacing parts of the system.
• Dee-rings and snaphooks shall have a minimum tensile strength of 5,000 pounds (22\.2 kN).

Warning Line Systems

Warning line systems can be used to alert workers to the presence of a fall hazard. Requirements for warning line systems include:

• The rope, wire, or chain shall be flagged at not more than 6-foot (1\.8 m) intervals with high-visibility material.
• The rope, wire, or chain shall be rigged and supported in such a way that its lowest point (including sag) is no less than 34 inches (.9 m) from the walking/working surface and its highest point is no more than 39 inches (1\.0 from the walking/working surface.
• After being erected, with the rope, wire, or chain attached, stanchions shall be capable of resisting, without tipping over, a force of at least 16 pounds (71 N) applied horizontally against the stanchion, 30 inches (.8 above the walking/working surface, perpendicular to the warning line, and in the direction of the floor, roof, or platform edge.
• The rope, wire, or chain shall have a minimum tensile strength of 500 pounds (2\.22 kN), and after being attached to the stanchions, shall be capable of supporting, without breaking, the loads applied to the stanchions as prescribed.
• The line shall be attached at each stanchion in such a way that pulling on one section of the line between stanchions will not result in slack being taken up in adjacent sections before the stanchion tips over.

Safety Monitoring Systems

In certain situations, a safety monitoring system can be used in conjunction with a warning line system. The safety monitor must:

• Be a competent person to recognize fall hazards.
• Warn the employee when it appears that the employee is unaware of a fall hazard or is acting in an unsafe manner.
• Be on the same walking/working surface and within visual sighting distance of the employee being monitored.
• Be close enough to communicate orally with the employee.
• Not have other responsibilities which could take the monitor's attention from the monitoring function.

Fall Protection Plan

In some cases, conventional fall protection systems may be infeasible or create a greater hazard. In these situations, a fall protection plan must be developed and implemented. The plan must:

• Be prepared by a qualified person and developed specifically for the site where the work is being performed and the plan must be maintained up to date.
• Document the reasons why the use of conventional fall protection systems (guardrail systems, personal fall arrest systems, or safety nets systems) are infeasible or why their use would create a greater hazard.
• Include a written discussion of other measures that will be taken to reduce or eliminate the fall hazard for workers who cannot be provided with protection from the conventional fall protection systems.
• Identify each location where conventional fall protection methods cannot be used. These locations shall then be classified as controlled access zones and the employer must comply with specific criteria.
• Include a statement which provides the name or other method of identification for each employee who is designated to work in controlled access zones. No other employees may enter controlled access zones.
• In the event an employee falls, or some other related, serious incident occurs, the employer shall investigate the circumstances of the fall or other incident to determine if the fall protection plan needs to be changed and shall implement those changes to prevent similar types of falls or incidents.

Training and Competency

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All workers who may be exposed to fall hazards must receive comprehensive training on fall protection measures, including the proper use of equipment, hazard recognition, and emergency procedures. Training should be conducted by a competent person and documented appropriately.

Training should cover:

• How and when to use protective equipment safely.
• Recognition of new or previously unrecognized fall hazards and the procedure for reporting them immediately.
• Understanding of the protective measures taken to reduce falls, such as guardrails and safety nets.

Inspection and Maintenance

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Regular inspection and maintenance of all fall protection equipment and systems are essential to ensure their continued effectiveness. Inspections should be conducted by a competent person and any defective equipment should be immediately removed from service.

Emergency Procedures

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A comprehensive emergency rescue plan must be in place to address situations where a worker falls and is suspended by a fall arrest system. The plan should include procedures for prompt rescue and medical attention.

Responsibilities

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Employers, supervisors, and workers all have responsibilities for fall protection. Employers are responsible for providing a safe work environment, ensuring that fall hazards are identified and controlled, and providing appropriate training and equipment. Supervisors are responsible for ensuring that workers follow safe work practices and use fall protection equipment correctly. Workers are responsible for following safe work practices, using fall protection equipment as instructed, and reporting any hazards or concerns to their supervisor.

Regulatory Compliance

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All fall protection measures must comply with applicable safety regulations and standards. Employers should consult with relevant authorities to ensure that their fall protection program meets all legal requirements.

Falls are common causes of serious work related injuries and deaths. Fall protection planning can help to eliminate the hazards or control the risks associated with working near openings or at heights. [2]

Working at heights is any work where a person could fall a distance and be injured, including falling through an unguarded hole in the ground or floor. [2] [2]

Occupational health and safety laws generally require action when a worker has the potential to fall about 3 metres (10 feet). [1]

Fall protection measures generally include fixed barriers (e.g., handrails, guardrails), surface opening protection (e.g., covers, guardrails, etc.), warning barriers or control zones, fall or travel restraint systems, fall containment systems (e.g., safety nets) and fall arrest systems. [1]

A fall protection plan is a general term for the policy and procedures used to identify fall hazards, and the measures taken to prevent injury. Included in this plan is selecting, assembling, maintaining, inspecting, using, and dismantling equipment such as ladders, scaffolds, or platforms used for working at heights as well as any fall protection equipment. [1]

All covers shall be secured when installed so as to prevent accidental displacement by the wind, equipment, or employees. [3]

All covers shall be color coded or they shall be marked with the word "HOLE" or "COVER" to provide warning of the hazard. [3]

The top edge height of top rails, or equivalent guardrail system members, are 42 inches (107 cm), plus or minus 3 inches (8 cm), above the walking-working surface. [5]

Mid-rails, screens, mesh, intermediate vertical members, solid panels, or equivalent intermediate members are installed between the walking-working surface and the top edge of the guardrail system as follows when there is not a wall or parapet that is at least 21 inches (53 cm) high. [5]

Guardrail systems are capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied in a downward or outward direction within 2 inches (5 cm) of the top edge, at any point along the top rail. [5]

When guardrail systems are used around holes, they are installed on all unprotected sides or edges of the hole. [5]

Safety nets shall be installed as close as practicable under the walking/working surface on which employees are working, but in no case more than 30 feet (9\.1 m) below such level. [4]

Safety nets shall be inspected at least once a week for wear, damage, and other deterioration. Defective components shall be removed from service. [4]

The maximum size of each safety net mesh opening shall not exceed 36 square inches (230 cm) nor be longer than 6 inches (15 cm) on any side, and the opening, measured center-to-center of mesh ropes or webbing, shall not be longer than 6 inches (15 cm). [4]

Connectors shall be drop forged, pressed or formed steel, or made of equivalent materials. [4]

Connectors shall have a corrosion-resistant finish, and all surfaces and edges shall be smooth to prevent damage to interfacing parts of the system. [4]

Dee-rings and snaphooks shall have a minimum tensile strength of 5,000 pounds (22\.2 [4]

The rope, wire, or chain shall be flagged at not more than 6-foot (1\.8 m) intervals with high- visibility material. [6]

The rope, wire, or chain shall be rigged and supported in such a way that its lowest point (including sag) is no less than 34 inches (.9 m) from the walking/working surface and its highest point is no more than 39 inches (1\.0 from the walking/working surface [6]

After being erected, with the rope, wire, or chain attached, stanchions shall be capable of resisting, without tipping over, a force of at least 16 pounds (71 N) applied horizontally against the stanchion, 30 inches (.8 above the walking/working surface, perpendicular to the warning line, and in the direction of the floor, roof, or platform edge [6]

The rope, wire, or chain shall have a minimum tensile strength of 500 pounds (2\.22 kN), and after being attached to the stanchions, shall be capable of supporting, without breaking, the loads applied to the stanchions as prescribed in paragraph (f)(2\)(iii) of this section [6]

The line shall be attached at each stanchion in such a way that pulling on one section of the line between stanchions will not result in slack being taken up in adjacent sections before the stanchion tips over. [6]

The fall protection plan shall be prepared by a qualified person and developed specifically for the site where the leading-edge work, precast concrete work, or residential construction work is being performed and the plan must be maintained up to date. [7]

The fall protection plan shall document the reasons why the use of conventional fall protection systems (guardrail systems, personal fall arrest systems, or safety nets systems) are infeasible or why their use would create a greater hazard. [7]

The fall protection plan shall include a written discussion of other measures that will be taken to reduce or eliminate the fall hazard for workers who cannot be provided with protection from the conventional fall protection systems. [7]

The fall protection plan shall identify each location where conventional fall protection methods cannot be used. These locations shall then be classified as controlled access zones and the employer must comply with the criteria in paragraph (g) of this section. [7]

The fall protection plan must include a statement which provides the name or other method of identification for each employee who is designated to work in controlled access zones. No other employees may enter controlled access zones. [7]

In the event an employee falls, or some other related, serious incident occurs, (e.g., a near miss) the employer shall investigate the circumstances of the fall or other incident to determine if the fall protection plan needs to be changed (e.g. new practices, procedures, or training) and shall implement those changes to prevent similar types of falls or incidents. [7]

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