Overhead Working Sign

Overhead Working Sign – ISO 7010 Warning Symbol HS0048

This Overhead Working sign warns crew and contractors passing below that personnel, tools or materials are working at height above the area and that falling objects present a real risk. The sign combines the standard black exclamation triangle with a bold “DANGER – Overhead working” text panel beneath it, giving anyone approaching the area an instant visual cue plus an explicit written instruction in a single fixture.

As SKU HS0048 in the Hazard Signs range, it is built for continuous marine exposure and suits temporary barricading of deck areas, walkways and workshop floors during aloft or elevated work.

The upper section shows the familiar black exclamation mark inside a warning triangle, while the lower panel spells out “DANGER” in bold capitals followed by “Overhead working” in smaller text, a combined pictogram-and-wording format that gives crew below a clear, temporary marker distinct from the vessel’s permanent hazard signage.

Because tools, fasteners and materials can be dropped without warning from height, the written panel gives crew and visiting contractors the specific context a generic triangle alone cannot provide. The photoluminescent base keeps the overhead working warning visible for a period after lighting fails, useful during extended work periods that span shift changes or drills.

Why Overhead Working Marking Matters

Falling tools and materials from work carried out aloft or on staging remain a recognised cause of serious injury on deck and in workshop areas, and clearly marking the exclusion zone beneath the work is a standard control in working-at-height procedures. Overhead working signage at every affected location reminds crew not to walk or stand beneath active elevated work and supports the vessel’s permit-to-work system for aloft and staging jobs. It also gives supervisors a clear reference point when briefing the watch on which deck areas are temporarily restricted.

Compliance and Certification

This sign is produced to align with IMO shipboard safety signage guidance and the combined pictogram-and-text warning format used across shipping and industrial working-at-height safety, supporting the ISM Code’s requirement for documented control of falling-object hazards. A visible overhead working warning beneath any active aloft or staging job is a documented control that classification surveyors and internal safety auditors expect to see during a permit-to-work review.

Installation Recommendations

Position the sign at the perimeter of the exclusion zone beneath the elevated work, at a height and location that is seen before crew enter the area. The self-adhesive backing suits quick, temporary placement for the duration of the work, while barricade tape or cones can be combined with the sign to reinforce the exclusion zone on open deck areas. Remove the sign promptly once the elevated work is complete and the area has been confirmed clear.

• 425 x 567mm rigid or self-adhesive format for steel, aluminium or GRP surfaces
• Photoluminescent base for visibility during power loss or blackout drills
• UV-stable, saltwater-resistant construction for long-term exterior exposure
• Self-adhesive or pre-drilled fixing options for fast, secure installation
• Combined pictogram and bold English text for added clarity beyond the symbol alone

Order the HS0048 Overhead Working sign today to mark every exclusion zone beneath active aloft or staging work before your next permit-to-work audit. Safety Sign Hub stocks the complete IMPA/ISSA-coded hazard sign range and ships marine-grade signage across Australia and to vessels in port, with bulk pricing for fleet orders.

See the full Hazard Signs range for related ISO 7010 warning pictograms, or browse our Fire Fighting Signs for IMO A.654(16) fire control signage to complete your vessel’s safety signage plan.