A rooftop curb is flat but the roof deck is sloped
A sloped roof with a flat curb can set the unit out of level and create condensate/drain problems. Verify curb pitch adapter requirements before the crane set.
The roof is pitched but this curb top is not level at [unit]. I checked pitch and drain side. Do you want a pitch adapter/curb correction before the crane set, or manufacturer/detailer direction?
Watch out
Do not set heavy rooftop equipment on an out-of-level curb and hope the drain pan works later.
Check
Measure roof pitch and check whether the curb top is level both directions.
Check the RTU/AHU/curb submittal for pitch adapter or level tolerance requirements.
Confirm condensate drain pan direction and drain outlet side.
Coordinate with roofing/structural/GC if curb modification affects flashing or support.
Fix before crane set when possible.
Steps
Measure roof pitch and check whether the curb top is level both directions.
Check the RTU/AHU/curb submittal for pitch adapter or level tolerance requirements.
Confirm condensate drain pan direction and drain outlet side.
Coordinate with roofing/structural/GC if curb modification affects flashing or support.
Fix before crane set when possible.
Say this to your foreman
The roof is pitched but this curb top is not level at [unit]. I checked pitch and drain side. Do you want a pitch adapter/curb correction before the crane set, or manufacturer/detailer direction?