How do I verify the RTU curb gasket is seated perfectly before the crane unhooks

Plain-English answer

As the crane slowly eases the weight of the RTU down onto the roof curb structure, walk the entire indoor lower perimeter layout line inside the curb drop using a high-intensity flashlight. * Verify that the heavy rubber or closed-cell foam gasket strip is completely and uniformly compressed between the upper unit frame and the lower curb shelf rail, without any pinches, rolled spots, or open visual gaps where air or rainwater could seep through.

Field checklist

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• As the crane slowly eases the weight of the RTU down onto the roof curb structure, walk the entire indoor lower perimeter layout line inside the curb drop using a high-intensity...

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Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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