Clearance Signs | Maximum Clearance Sigs

Frequently Asked Questions

Q. What is a "Low Clearance" sign?

Low Clearance signs warn drivers that an overhead structure (such as a bridge, garage entrance, pipe, or beam) is lower than standard height. They are critical for preventing collisions that damage both the vehicle and the structure, often saving costly repairs and preventing injuries. You can find these in our low clearance signs

Q. How do I determine the clearance height to post?

Measure the lowest point and subtract a 3–6 inch safety margin. For custom measurements, use our clearance signs tool to print your specific height.

Q. Where should clearance signs be placed?

Place them on the obstruction and in advance of the hazard. For indoor warehouse beams, pairing them with caution floor signs at the approach can provide extra warning for forklift drivers.

Q. What is a "Headache Bar" sign?

This refers to a clearance bar hung on chains at the entrance to a parking structure. If a vehicle hits the bar (giving the driver a "headache"), they know they are too tall for the structure and must stop immediately before causing structural damage inside.

Q. Are yellow clearance signs standard?

Yes, yellow is the MUTCD standard color for warning signs. The high contrast of black text on a yellow background ensures the height restriction is easily noticed by drivers in all lighting conditions, alerting them to the low clearance.

About our Clearance Signs

Prevent costly accidents and equipment damage by clearly marking height restrictions with high-visibility clearance signs. Whether it’s a parking garage, warehouse beam, loading dock, or overhead pipe, these signs help drivers and operators quickly assess whether they can safely pass through an area.

• Display exact clearance heights to help drivers make quick, informed decisions before entering restricted areas.
• Install signs at entry points and directly on low-clearance structures for maximum visibility and early warning.
• Use bold yellow-and-black designs that stand out in busy industrial and traffic-heavy environments.
• Reduce the risk of vehicle collisions, structural damage, and operational delays.
• Select materials that maintain visibility and durability in indoor, outdoor, and high-traffic conditions.