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SpanGuard™ ABS
Standard Power Line Marker

This is the power line marker ball that has set the standard for decades! Routinely installed on hot lines by helicopter, SpanGuard ABS markers are rated up to 115 kV and made of durable ABS with superior color retention. Spiral wire preforms are used for secure attachment. SpanGuard ABS markers are available international orange, yellow, or white, and in 9”, 20”, 24”, and 36” diameters.

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FAA Advisory

Click here for FAA Advisory Circular #70/7460-1M (Nov. 2020)

Orange, yellow and white power line markers shown on power lines with trees in the background.
Photo showing the spiral preform feature on a power line with a SpanGuard ABS marker installed.
Orange SpanGuard ABS power line marker with SpanBrite reflective tape.
Photo showing two men assembling both halves of a SpanGuard ABS power line marker.
Photo showing a man sitting on the edge of a helicopter installing a SpanGuard ABS power line marker on a power line.
Photo showing a man sitting on the edge of a helicopter installing a SpanGuard ABS power line marker on a power line.

SpanGuard ABS Applications

The FAA advises that 36” power line markers be used on high transmission lines and hazardous river crossings. Smaller 20” power line markers are permitted on less extensive power lines or on lines in approaches to airports below 50 feet. Each power line marker should be a solid color, and the FAA suggests that alternating colors be used on critical lines to optimize visibility in all seasons.

See FAA Advisory Circular 70/7460-1L (Dec. 2015) >

Spiral Preform Attachment

SpanGuard ABS markers are securely attached to the conductor with spiral formed armor rods. Armor rods are matched at time of order to the specific size, type, and diameter of line.

SpanBrite™ Nighttime Option

SpanBrite reflective tape is an option that makes the marker visible up to 2500 feet away at night, typically near small airports and hospitals.

SpanGuard ABS Assembly & Installation

SpanGuard ABS power line markers are easy to install on the ground or from a bucket, and they are ideally suited to installation by helicopter. This makes it possible to install markers on otherwise inaccessible lines across rivers or deep canyons, or where it is not feasible to take the line out of service.

The markers can be largely assembled on the ground in a “clamshell” configuration with the spiral preform in place. In the air, the preform is ready to wrap around the line and only the three bolts closest to the installer need to be installed.

See the video tab on this page for video of a SpanGuard ABS power line marker install.

SpanGuard ABS Ordering Information

SpanGuard ABS power line markers are a custom, made-to-order product. Please contact us directly to place an order. Note that a purchase order is required to establish your place in the production schedule.

SpanGuard ABS Data Sheet (PDF)