Understanding Fall Arrest and Fall Restraint Systems

Most sites need both a fall arrest and a fall restraint system.

The question is which applies where, and getting that wrong before you specify costs time, budget, and rework.

Here is everything you need to know about how these two systems work, when and which system is required, and what the engineered infrastructure looks like on a compliant site.

Fall arrest and fall restraint are not interchangeable terms.

They describe two distinct approaches to managing fall risk - and choosing the wrong one creates compliance gaps, cost blowouts, and systems that don't perform as intended.

Let's see the differences between these systems, helping you make safe access decisions for your site and workplace.

WHAT IS A FALL ARREST SYSTEM?

Arrest systems are required when workers need to operate near the edge if there are no guardrails or barriers installed.

- Fall arrestors activate after a fall occurs -

It does not prevent the fall - it stops it, limiting the forces on the worker's body and preventing contact with a lower level.

Fall arrest is specified when the nature of the task or site layout makes it impractical to keep workers away from the fall hazard entirely.

It sits lower in the hierarchy of control than fall restraint, used when elimination, passive protection, and restraint are not reasonably practicable.

The engineered infrastructure of a fall arrest system that Safetylyne designs and installs includes:

• Anchor points rated to 15kN for fall arrest applications, structurally engineered to the roof or building
• Static line systems, horizontal cable systems that allow movement across a roof or structure while keeping the worker connected at all times
• Rigid rail systems, overhead tracked systems suited to areas where swing fall risk must be eliminated, including maintenance workshops, truck bays, and process plant equipment
• Self-Retracting Lifelines (SRLs), mechanical connection devices, which lock instantly during a fall event, functioning seamlessly with static lines and rigid rails to minimise free-fall distance.

- Fall arrest systems are designed to stop a worker's fall in progress -

These systems are essential for situations where there is a risk of falling from a height.

If the workers perform their tasks next to the edge, the arrestor system catches them before they fall.

The fall arrest system allows you to move freely within a designated area, and it only activates once you fall. This safety system should be designed to stop you before you get to a lower level or the ground.

The wearable components, including harness, lanyard, and inertia reel, are specified and supplied separately by a PPE provider.

Safetylyne designs and installs the engineered system these components connect to.

When a fall arrest system is in place, a rescue plan needs to be in place.

A worker suspended in a harness after a fall requires prompt retrieval, and the plan must be prepared and tested before work begins.

Components of Fall Arrest Systems

A typical fall arrest system includes:

• Anchor Point - A secure abseil point where the system is attached. It must be strong enough to withstand the forces of a fall.
• Body Harness -  Worn by the worker, distributing the force of the fall across the body.
• Connecting Device - Often a lanyard or a self-retracting lifeline that connects the harness to the anchor point.

When to Use Fall Arrest Systems

Fall arrest systems are used when workers are performing tasks at heights where a fall hazard exists, such as on rooftops, ladders, or scaffolding.

These systems are vital when it is not possible to eliminate the fall hazard or use other means to prevent a fall.

- A fall restraint system prevents a fall from happening -

A restraint system physically limits how far a worker can travel, keeping them away from the fall hazard before they reach it.

Fall restraint sits higher in the hierarchy of control than fall arrest.

Where practicable, it is the preferred specification. A worker who cannot reach the edge usually does not need a system to catch them.

Safetylyne's fall restraint systems include:

• Overhead rail systems, tracked systems that restrict lateral movement, are commonly specified for rooftop plant access, loading areas, and elevated walkways
• Anchor points are used with a fixed-length lanyard to define the worker's safe zone and keep them back from the fall hazard

What Are Fall Restraint Systems?

Fall restraint systems, unlike fall arrest systems, are designed to prevent a fall from occurring in the first place. These restrainer systems restrict a worker’s movement to prevent them from reaching an area where a fall could happen.

Components of Fall Restraint Systems

A fall restraint system typically includes:

• Anchor Point - Similar to fall arrest systems, it provides a secure attachment.
• Body Harness - Designed to keep the worker from reaching the fall hazard.
• Restraint Line - A fixed-length line that limits how far the worker can move.

When to Use Fall Restraint Systems

Fall restraint systems are ideal for situations where workers need to be near a fall hazard but can perform their tasks without the need to approach the edge.

Examples include maintenance work on flat rooftops or working near skylights.

Fall Arrest vs Fall Restraint: Key Differences

Understanding the differences between fall arrest and fall restraint systems is critical for safety managers, building maintenance managers, and all workers performing tasks on elevated areas.

Here are some key distinctions:

• Purpose - Fall arrest systems stop falls in progress, and fall restraint systems prevent falls from occurring.
• Mobility - Workers using fall arrest systems can move around freely, but the system catches them if they fall. Fall restraint systems limit movement to prevent reaching the hazard.
• Application -  Fall arrest systems are used when a fall risk can’t be completely removed, while fall restraint systems are designed to stop workers from reaching the edge or hazard in the first place.

What does it mean for you:

+ Use fall arrest - when a fall can’t be avoided.

+ Use fall restraint - when workers can stay clear of the hazard altogether.

FALL ARREST VS FALL RESTRAINT:

HOW TO CHOOSE WHICH SYSTEM YOU NEED

The right system comes down to the task, the site, and what's practicable.

Use fall restraint when workers can perform their tasks without needing to approach the fall hazard. The system defines its boundary and keeps it within it.

Use fall arrest when the task requires workers to be at or near the hazard - on a roof edge, above machinery, or in an area where restraint isn't practicable. The system is designed to stop a fall once it occurs.

In many cases, a site will use both fall arrest and fall restraint systems.

A rooftop maintenance program might use guardrails and walkways as passive protection across most of the roof, fall restraint anchor points near HVAC equipment, and a static line system near the perimeter where workers need to get close to the edge.

Safetylyne designs integrated fall protection systems for safe work at heights.

The specification accounts for the full access requirement, the hierarchy of control, and how the engineered system and the PPE work together.

FALL ARREST VS TRAVEL RESTRAINT

Travel restraint is a specific application of fall restraint.

Where fall restraint broadly describes any system that keeps a worker from reaching a fall hazard, travel restraint refers specifically to a fixed-length connection between the worker and an anchor point that limits horizontal movement.

The worker physically cannot travel far enough to reach the edge.

Fall arrest allows the worker to be at or near the hazard.

The system is engineered to stop the fall once it happens, not before.

Understanding this distinction matters when writing a safe work method statement or specifying the correct anchor point rating.



Keep in mind that travel restraint anchor points have different load requirements than fall arrest anchor points.

How to implement the right fall protection system



Implementing effective fall protection systems involves several steps:

1. Assess the Work Environment

Conduct a thorough assessment of the workplace to identify potential fall hazards. Consider areas where workers are exposed to heights and determine whether fall restraint or fall arrest systems are more appropriate.

2. Choose the Right System

Select the system that best fits the work environment and tasks. If possible, use fall restraint systems to prevent falls. If not, ensure that fall arrest systems are properly installed and maintained.

3. Train Employees

Provide comprehensive training for employees on the use of fall protection systems. Training should cover how to properly wear harnesses, connect to anchor points, and inspect equipment.

4. Regular Inspections and Maintenance

Implement a routine inspection and maintenance schedule for all fall protection equipment. Check for wear and tear, ensure all components are functioning correctly, and replace any damaged parts if needed.

For a professional height safety review, talk to Safetylyne about a site safety audit.

Our team can assess your height safety setup, identify any gaps, and recommend the most effective solutions for your site.

5. Stay Compliant with Regulations

Stay updated with local and national safety regulations on fall protection.

Ensure that all systems and practices comply with these standards to maintain a safe work environment.

By understanding the differences and implementing the right systems, safety managers can significantly reduce the risk of accidents, create a safer workplace, and maintain compliance.

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AUSTRALIAN HEIGHT SAFETY REGULATIONS FOR FALL ARREST AND FALL RESTRAINT SYSTEMS

All fall arrest and fall restraint systems installed in Australian workplaces must comply with the Work Health and Safety Act and its associated regulations.

AS/NZS 1891.4 is the governing standard for the selection, use, and maintenance of fall arrest and fall restraint equipment. AS 1657:2018 applies to the fixed structural components including platforms, walkways, and the structures that anchor points and static lines are engineered to.

Employers have a legal duty to ensure systems are designed by a competent person, installed to the relevant standard, and maintained and recertified on schedule.

FALL ARREST AND FALL RESTRAINT CERTIFICATION AND RECERTIFICATION

Fall arrest and fall restraint systems require periodic inspection and recertification to remain compliant under AS/NZS 1891.4. Permanent systems - anchor points, static lines, rigid rails - require formal inspection at least every 12 months by a competent person.

Safetylyne provides recertification for fall arrest systems we install and for existing systems where documentation has lapsed or records are incomplete. Height Safety Recertification includes physical inspection, load testing where required, updated compliance documentation, and a recertification certificate suitable for your safety management system.

Not sure which height safety system your site needs?



Safetylyne's engineering team works through the hierarchy of control with you - from site assessment through to design, installation, and ongoing certification.

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