Danger Open Cut Utility Trench Sign – Hazardous Gases May Accumulate, Test Atmosphere and Ventilate Before Entry, 8x12 Rust-Resistant Aluminum Trench Safety Sign by CGAP Safety

Trench walls aren’t the only thing that can collapse on a crew; a bad atmosphere can drop them even faster.

The CGAP Safety “Danger – Open Cut Utility Trench – Hazardous Gases May Accumulate – Test Atmosphere & Ventilate Before Entry” sign is designed for utility, pipeline, and heavy civil projects where gases or low oxygen may develop in open cut trenches. The bold red DANGER header and clear wording remind workers that they must test the atmosphere and ventilate the space before entering the trench.

This 8 x 12 inch sign is manufactured from rust-resistant aluminum to withstand outdoor exposure, mud, and rough handling on active jobs. The high-contrast red, black, and white OSHA-style layout stands out on fencing, trench boxes, shoring frames, and site access points so the warning is visible as crews approach the trench.

Use this sign as part of your overall trench safety and confined space program to reinforce atmospheric testing and ventilation expectations for employees and contractors.

Important: This product is a warning sign only and does not replace competent person oversight, atmospheric monitoring, shoring, or regulatory requirements. Always follow applicable trenching, excavation, and confined space standards, site procedures, and equipment manufacturer instructions.

CGAP Safety is an American safety sign manufacturer dedicated to straightforward, durable signage that helps contractors and utilities see the gap and close the gap in their safety programs.

• UTILITY TRENCH GAS HAZARD SIGN – “Danger / Open Cut Utility Trench / Hazardous Gases May Accumulate / Test Atmosphere & Ventilate Before Entry” warns crews that atmospheric hazards may be present when entering open cut trenches.
• CALLS OUT TESTING & VENTILATION – Direct wording instructs workers to test the atmosphere and ventilate before entry, supporting confined space and trench safety programs instead of implying that ventilation alone is enough.
• 8x12 RUST-RESISTANT ALUMINUM – Rigid 8 x 12 inch sign manufactured from rust-resistant aluminum with high-contrast red, black, and white graphics for a professional look that outlasts paper, laminated sheets, and thin plastic on outdoor jobs.
• HIGH-VISIBILITY OSHA-STYLE LAYOUT – Classic red “DANGER” header and bold block lettering make the message easy to read at a distance on fencing, trench boxes, shoring, and site access points.
• FOR UTILITY, PIPELINE & CIVIL WORK – Ideal for water and sewer crews, gas utilities, telecom trenches, industrial sites, and heavy civil projects where open cut trenches can collect hazardous gases or low oxygen.
• MADE BY AN AMERICAN SAFETY MANUFACTURER – Produced by CGAP Safety, an American safety sign manufacturer focused on clear, compliance-minded messaging and durable materials for real-world job sites.