Hand Signals, Tag Lines, and Communication During Lifts

Why Signals and Tag Lines Matter

Every rigging accident investigation in electrical linework points to the same root causes: a load that moved when no one expected it, a signal that was misread, or a tag line that went slack at the wrong moment. When you add the hazard of nearby energized conductors, a swinging load is not just a struck-by risk — it can create an arc flash or ground fault that kills everyone in the work zone. Clear, standardized hand signals and disciplined tag-line technique are the front-line controls that keep suspended loads predictable and workers safe.

The Signal Person's Role

ASME B30.3 — the standard that governs construction-type cranes — designates the signal person as the single authorized voice between the work crew and the equipment operator. Only one signal person gives signals to the operator at any time. The operator obeys only that person's signals, except for an emergency stop, which anyone on the site may give.

Before the lift begins, the crew must agree on who the signal person is and confirm the communication method (hand signals, radio, or both). If radio is used, hand signals remain the backup. The signal person must maintain a clear line of sight to the operator and the load throughout the lift. If line of sight is lost for any reason, the signal person immediately gives the Dog Everything signal — all motion stops until communication is re-established.

Standard ASME B30.3 Hand Signals

Learn every signal so it becomes automatic. Each description below matches the poster you will use in class.

• Hoist: Forearm vertical, forefinger pointing up, make small horizontal circles with the wrist.
• Lower: Arm extended downward, forefinger pointing down, make small horizontal circles with the wrist.
• Use Main Hoist: Tap fist on head, then give motion signal.
• Use Whip Line (auxiliary): Tap elbow with one hand, then give motion signal.
• Raise Boom: Arm extended, fingers closed, thumb pointing up.
• Lower Boom: Arm extended, fingers closed, thumb pointing down.
• Swing: Arm extended, point with finger in direction of swing.
• Stop: Arm extended laterally, palm down, hold position rigidly.
• Emergency Stop: Both arms extended laterally, palms down, wave rapidly.
• Travel: Arm extended forward, hand open and slightly raised, push in direction of travel.
• Extend Boom: Both fists in front of body with thumbs pointing outward.
• Retract Boom: Both fists in front of body with thumbs pointing toward each other.
• Dog Everything: Clasp hands in front of body; all motion stops.

Practice each signal until you can produce it without thinking. In the role-play exercise, an ambiguous or incomplete signal means the lift stops — exactly as it would on a job site.

Communicating During a Lift

Good communication is continuous, not just at the start. The signal person watches the load, the rigging, and the clearance zones simultaneously. Key habits:

1. Pre-lift brief: Every lift gets a brief that covers the load weight, rigging plan, travel path, and designated clearance zones (especially any energized conductor buffers).

2. Positive confirmation: Before giving the first hoist signal, the signal person confirms that all crew members are clear of the load's travel path.

3. Slow and deliberate: Signal one motion at a time. Never combine two motions into a single gesture — the operator may interpret only one of them.

4. Hold on ambiguity: If anything is uncertain, signal Dog Everything and talk it through before continuing.

Tag-Line Fundamentals

A tag line is a rope attached to a suspended load to control its rotation and lateral position. Tag lines do not lift the load — the rigging does that. Tag lines prevent the load from spinning, swinging into obstacles, or drifting into clearance zones.

Attachment: Attach tag lines to a secure point on the load, low enough to give good lateral leverage. Never attach a tag line to the rigging hardware or the hook.

Length: Tag lines should be long enough that handlers stay well clear of the load and never directly under it. A minimum of 20 feet is the standard starting point; longer is often better.

Two-person control: Two tag-line handlers work as a team, one on each side of the load's travel path. Each handler maintains slight tension — the line is never slack, but neither handler pulls hard enough to fight the other or the rigging. Communicate verbally: call out "tension" when you take up slack, "easing" when you let line out, and "stop" if the load moves toward a hazard.

Gloves and grip: Always wear leather lineman's gloves when handling tag lines. Never wrap a tag line around your hand, wrist, or body — a sudden load shift can drag you off your feet or into the load.

Clearance zones: In electrical linework, flag or cone off the minimum approach distance to any energized conductor before the lift begins. Tag-line handlers must position themselves so their bodies stay outside those zones, and they must never allow the load or the tag line itself to enter the zone.

Safety Priorities for Every Lift

• Wear hard hat, safety glasses, hi-vis vest, and leather gloves throughout the exercise.
• Stand outside the fall zone — the area beneath and around the load where a dropped load or failed rigging could strike you.
• If a tag line goes slack, call Stop immediately; do not attempt to recover the load while motion continues.
• Never stand between the load and a fixed object.
• In the field, treat any unidentified overhead line as energized until confirmed otherwise by the system operator.