Elevated Work Surface Warning Line System

On elevated work surfaces, the FlexLine Warning Line System can be used to mark off a safe work area. Only under certain conditions can a warning line system be used for fall protection.

FlexLine Warning Line Features

The FlexLine Warning Line System is a sturdy, freestanding, portable OSHA compliant warning line that works indoors and outside. The system includes:

  • Durable bases made from recycled rubber
  • Galvanized uprights, 39 inches tall with connection loops and end caps
  • Stainless steel cable that’s vinyl coated safety yellow
  • Large, heavy-duty nylon mesh flags in safety orange.

The system’s simple modular design uses durable galvanized components that stay in place with a hidden set screw. The 1/8″ stainless steel cable includes 2 Stainless Steel Shackles for easy adjustment.

FlexLine Warning Line Systems are available in 10, 15, and 20 foot cable lengths. Multiple systems can be aligned for a longer warning line system.

When to Use a Warning Line

Warning lines do not serve as an actual barrier to a fall, instead providing a visual warning of a fall hazard. Be sure your work areas are compliant with OSHA regulations when determining whether or not to implement a warning line system. Click here for OSHA warning line standards.

A Flexible Lifeline Systems fall safety specialist can help you determine if the FlexLine Warning Line System will provide adequate safety for your fall hazard, or if a FlexGuard railing system is needed.


Warning Line / FlexLine Animation


Select below for more information about specific rooftop safety solutions.

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FLS Multispan Lifeline Systems are versatile, economical solutions that equip rooftop workers with continuous, active fall protection.

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Vertical Lifelines & Ladder Davits

The two most common solutions for ladder fall arrest systems are cable based vertical lifelines and ladder davits with self-retracting lifelines.

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Skylight Guards

Versatile, OSHA-compliant skylight covers. Our skylight screens provide cost effective and easy-to-install protection from falls through skylights.

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The freestanding rooftop anchor provides worker safety at heights where there is a requirement to access flat roofs or structures.

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Flexguard Permanent

A modular, freestanding and permanent guardrail system that does not penetrate the roof membrane.

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Flexguard Portable

A mobile guardrail system that is made up of modular sections and weights that can easily be assembled or moved.

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Flexguard Parapet

A railing system where the uprights are directly screwed to the rooftop parapet reducing cost while providing fall protection.

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Flexguard Topfix

Flexible Lifeline System’s metal roof railing solution that is pre-engineered to work with both standing seam and corrugated roof panels.

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FlexLine Warning Line System

On elevated work surfaces, the FlexLine Warning Line System can be used to mark off a safe work area.

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FlexWalk With Guardrail

The FlexWalk with Guardrail system from Flexible Lifeline Systems is a fall protection solution consisting of walkway and guardrail which can be installed quickly and easily on a wide variety of roofs.

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Skylight Guardrails

The FLS Skylight Guardrail is a freestanding fall-protection solution for use around skylights, roof lights, and dome lights.

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Custom Fall Protection Solutions

We can design and manufacture custom solutions per your requirements.

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