What is a roof warning line system?

It is a portable line of posts and bright pennant flags that marks a safe boundary back from the edge of a flat roof, so workers know where the fall hazard starts. Instead of a permanent rail, you set the weighted posts around the perimeter and string the pennant line between them, creating a clear visual warning line. It is a standard way to keep crews a safe distance from an unprotected roof edge during work.

How does it stay put on a roof without drilling?

Weight, not anchors. The posts sit on heavy rubber bases, around 30 pounds each, so they hold the line in place on the roof surface without any holes or fasteners that would damage the membrane. You set them around the perimeter, run the pennant line, and pick it all up when the job is done. That keeps it reusable from job to job and safe for the roof itself.

What comes in a kit, and what size do I need?

The kits pair the warning line posts with their bases and a run of pennant flag line, sized to the perimeter you need to cover, like a 50 post kit for a big roof or a smaller set for a compact one, with over 100 feet of pennant line per roll. Measure the perimeter you have to mark, then pick the kit that covers it, or add posts, bases, and pennant line separately to build out an odd shaped roof.

Cortina Guardian Roof Warning Line Perimeter Kit - 50 Pack

50pack

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$2697.53 $3289.67 18% Off

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$2697.53	$2642.45

Bundle Includes

50 Grip-N-Go 42" Orange Channelizers
50 Rubber Bases (30 lbs)
2 Strands Red/Yellow Vinyl Pennants

Base

Black Recycled Rubber

Safety Standards

MUTCD & NCHRP-350

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Product Details
Cortina Guardian Roof Warning Line Perimeter Kit - 50 Pack - 03-765RBC

Guardian Rooftop Perimeter it includes 50 Grip-N-Go Cones & 50 Bases with 2 Strands of Red/Yellow Pennants. Use the Cortina Safety Products Roof Warning Line Perimeter on rooftops, construction sites, in parking lots, manufacturing plants, and office buildings. This simple to assemble Roof Warning Line Perimeter, with it's easy pennant flag tie off system, is easy to set up and remove quickly, and stores easily. The warning line shall be staged and supported in such a way that it is no less than 34 inches from the walking/working surface at its lowest point and no more than 39 inches at its highest point.

Features:
- High Visibility Orange cones
- OSHA 1926.502(f) Compliant
- Molded high density polyethylene with UV color stabilization
- 34" Minimum height between flag line and 39" Max tie off height
- Accepts warning light or sign
- Does not conduct
- Meets fall protection system requirements
- Easy BASE drop over assembly
- Stackable for Storage
- 100% recycled rectangular 30 lb. rubber base is mark free and skid resistant
Includes:
- 50 Grip-N-Go 42" Orange Channelizers
- 50 Rubber Bases (30 lbs)
- 2 Strands Red/Yellow Vinyl Pennants

Specifications

FAQ

Frequently Asked Questions:

What is a roof warning line system?

It is a portable line of posts and bright pennant flags that marks a safe boundary back from the edge of a flat roof, so workers know where the fall hazard starts. Instead of a permanent rail, you set the weighted posts around the perimeter and string the pennant line between them, creating a clear visual warning line. It is a standard way to keep crews a safe distance from an unprotected roof edge during work.

How does it stay put on a roof without drilling?

Weight, not anchors. The posts sit on heavy rubber bases, around 30 pounds each, so they hold the line in place on the roof surface without any holes or fasteners that would damage the membrane. You set them around the perimeter, run the pennant line, and pick it all up when the job is done. That keeps it reusable from job to job and safe for the roof itself.

What comes in a kit, and what size do I need?

The kits pair the warning line posts with their bases and a run of pennant flag line, sized to the perimeter you need to cover, like a 50 post kit for a big roof or a smaller set for a compact one, with over 100 feet of pennant line per roll. Measure the perimeter you have to mark, then pick the kit that covers it, or add posts, bases, and pennant line separately to build out an odd shaped roof.
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