Roof warning line systems

The VSS SafetyLine is a warning line system used to delimit a visual protection perimeter between work zones at height. The VSS SafetyLine is 100 % compliant with the CNBC and OSHA permanent warning line standards.

Features :

  • Permanent visual delimitation of a security perimeter
  • Modular: can be combined with Delta Prevention guardrails to secure the entire roof at low cost
  • Scalable: can be converted to a guardrail
  • Freestanding: 100 % without perforation
  • Complies with OSHA permanent warning line standards
  • Quick setup
  • Can not replace the use of an anti-fall system
  • Quick and easy installation
  • Compliance report included
  • 10 year warranty *
  • Made in Quebec
  • Meets CBNC, CNESST, OSHA standards


A Warning Line System with No perforation of the membrane

Maintaining the integrity of the waterproofing membrane is essential to protect the building envelope. That’s why the VSS SafetyLine warning line system is freestanding: its base acts as a counterweight, enabling it to comply with the permanent warning line standards.

Guaranteed durability

To eliminate rust, inevitable with a steel base, or the risk of breakage of a concrete base, our warning line system uses an eco-friendly and patented recycled rubber base. Extremely resistant to shock and temperature changes, these 50-lb. bases provide maximum grip on all types of flat roofs.


  • Recycled eco-friendly rubber
  • Patented design
  • No corrosion or rust stain on the membrane
  • No cracking and spilling of filling material
  • Very high adhesion to the roof membrane
  • Can be installed directly on the roof without sacrificing a membrane
  • Moulded handle for easy handling

Tubing and vertical posts:

  • Aluminum 6061-T6
  • Ultimate corrosion resistance
  • No risk of peeling paint
  • Ultra-light for easy installation

Converting Your Warning Line System to a Guardrail

Obviously, your needs will change over time. That’s why we’ve developed a warning line system that can easily be converted to a roof guardrail with 100 % shared components. By replacing steel cables with our traditional aluminum pipes, we are transforming visual protection into complete fall protection for a fraction of the cost!

WARNING LINE SYSTEM – VSS SAFETYLINE – For Canadian Building Standards

In this configuration, the VSS SafetyLine must have two bases per vertical post and the maximum spacing between two posts is 20 ‘.


In this configuration, the VSS SafetyLine must have one base per vertical post and the maximum spacing between two posts is 25 ‘.

Technical Data Sheet – Warning Line System

Maximum distance between poles : 240″
Maximum length – start / end of line: 150″
Maximum cable height allowed: 39″ from the ground
Minimum cable height allowed: 34″ from the ground
Cable- Material : steel, yellow nylon coating
Cable- Diameter ¼”
Flag – Material yellow nylon
Maximum distance between each flag: 72″
Counterweight : 50 lb/base
Counterweight – Material : recycled rubber
Tubing and posts : aluminum 6061-T6
Outside diameter 1,9″
Fittings – Material : galvanized steel
Hardware / Material : stainless steel
Tightening Torque : 30 lb/pi (CL201: 20 lb/pi)
Use : permanente, temporaire
Design patent : #162620
Waranty : 10 years
Complies with : CSTC: and OSHA: 1926.502(f)

Accessories – Warning Line System

Double connector

This dual connector connects two straight sections of a warning line.

# ITEM : CL167
Material : galvanized steel

90 ° Connector

This connector connects two warning line sections and creates a 90° corner.

# ITEM : CL168
Material : galvanized steel

Simple connector

This connector is used at the beginning and end of each permanent warning line. It can be installed on an independent vertical pole or on a Delta Prevention guardrail section.

# ITEM : CL173
Material : galvanized steel


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