The 3M™ DBI-SALA® Nano-Lok™ Edge Twin-Leg Self-Retracting Lifeline is engineered for foot-level tie-off and leading edge applications commonly found in construction and industrial work. Designed to meet ANSI Class 2 requirements, this twin-leg SRL supports continuous tie-off while delivering rapid fall arrest performance at low heights. Its compact housing mounts directly to the harness, providing mobility without interference, while the galvanized cable lifelines and high-capacity energy absorber offer reliable protection in demanding edge environments.

Key Features

Twin-leg configuration: Supports 100% tie-off during transitions
Leading edge rated: Designed for foot-level tie-off applications
Compact, back-mounted design: Worn directly on the harness for reduced bulk
Quick-activating speed-sensing brake: Locks within inches to minimize fall distance
Maintained lifeline tension: Reduces dragging and potential trip hazards
Durable nylon thermoplastic housing: Built for harsh jobsite conditions
High-capacity external energy absorber: Effectively manages fall forces
Integrated impact indicator: Visual confirmation if the device has arrested a fall
RFID enabled: Compatible with inspection and inventory management systems
Lanyard replacement option: Alternative to traditional shock-absorbing lanyards

Intended Use

This twin-leg self-retracting lifeline is intended for personal fall arrest in leading edge and foot-level tie-off applications requiring continuous connection.

Commercial and industrial construction
Structural steel erection
Concrete and formwork operations
Maintenance at height
Infrastructure and industrial facilities

Product Specifications

Product Name: 3M™ DBI-SALA® Nano-Lok™ Edge Twin-Leg Self-Retracting Lifeline
Lifelines Material: Galvanized Cable
Lifelines Length: 8 ft (Imperial)
Housing Material: Nylon thermoplastic
Anchorage Type: Harness steel and aluminum locking pin
Weight Capacity: CSA: 310 lbs (140 kg) / OSHA: 420 lbs (191 kg)

Available Configurations (Lifeline Hooks):

3500232 (7012819194): 2x Steel Snap Hook (9502116)
3500233 (7012819195): 2x Steel Swiveling Snap Hooks (9502195)
3500234 (7012819196): 2x Steel Rebar Hooks with locking nose (2000210)
3500238 (7012819198): 2x Aluminum Rebar Hooks with locking nose (2000209)

Certifications and Standards

CSA Z259.2.2 Type 1: Canadian standard for self-retracting devices used in fall arrest systems
CSA Z259.2.2-17 SRL-LE: Requirements for self-retracting lifelines rated for leading edge applications
OSHA 1926.502: U.S. construction fall protection criteria
OSHA 1910.140: U.S. general industry personal fall protection system requirements