How It Works
Two modes of protection. One integrated system. Built for the life of the infrastructure.
Two systems. One solution.
Visual warning tape and electronic path marking work together as a complete identification system. The tape warns at the trench face. The RF marker guides the crew before the first bucket of dirt is moved. Together, they reduce the risk of accidental utility strikes at every stage of excavation.
Mode 1: Visual Warning at the Trench Face
TrenchMark TM-2000 tape is the first line of defense when protecting underground utilities. Buried 1-3 feet below finished grade, APWA-standard color immediately communicates utility type — before the bucket gets any closer to buried infrastructure. The bold warning text reinforces the message. There is no ambiguity about what is buried below.
Mode 2: Electronic Path Marking from the Surface
The RF electronic marker — protected by TrenchMark Armor — is read by a 3M™ Dynatel™ 7000 Series locator from the surface. Each TM-2000 Series model broadcasts a unique frequency, allowing the locator to identify not just that a utility is present, but which utility type it is. This means crews can trace the utility path before any excavation begins.
Installation
Designed to install efficiently during normal pipe-laying operations — no special equipment, no additional crew.
Confirm Utility Type and Select Model
Select the correct TM-2000 Series model for the utility being installed. Verify APWA color, warning text, and RF frequency match the utility type before installation begins.
Place Tape Parallel to Utility
Install tape in the trench parallel to and directly above the pipe centerline. Maintain consistent lateral alignment throughout the run.
Install at Specified Depth
Position tape 1 to 3 feet below finished grade. The utility pipe may be installed much deeper — tape depth is measured from finished grade, not from the pipe crown. Consistent depth ensures reliable locator response.
Maintain Continuous Coverage
Overlap tape ends a minimum of 12 inches at joints, fittings, and splices. Maintain alignment through bends and changes in direction. Do not allow gaps in coverage.
Backfill Per Project Specifications
Backfill and compact per project specifications. TrenchMark tape and Armor-protected RF markers are designed to withstand normal backfill and compaction loads.
Document Installation
Record installation depth, alignment, and any deviations from standard placement for as-built documentation. Note RF marker locations for future locating reference.
Depth and Alignment Requirements
Depth Below Finished Grade
1–3 feet below finished grade
The utility pipe may be installed much deeper. Tape placement is measured from finished grade, not from the pipe crown.
Lateral Alignment
Directly above pipe centerline
Maintain consistent alignment through bends and fittings.
Overlap at Splices
12 inches minimum
Required at all joints, fittings, and tape end connections.
Tape Orientation
Warning text facing up
Ensure warning text is readable from above when tape is placed in trench.
Best Practices
Verify model before unrolling
Confirm the correct TM-2000 Series model is on the reel before installation begins. Color and model number are printed on the roll.
Keep tape taut during placement
Avoid slack or bunching. A taut, flat tape provides the most reliable visual warning and consistent RF marker placement.
Document deviations
Any deviation from standard depth or alignment should be noted in as-built records. Future locating crews depend on accurate installation documentation.
Questions about installation or specification?
Our team supports engineers, contractors, and municipal reviewers through the specification and installation process.