Floor Openings Do Not Line Up Through the Riser

I measured the riser openings from the same grid lines on three floors, and the middle opening is shifted. Can we verify whether the opening, sleeve, or duct route is being corrected before I release an offset?

Cutting, Holes, Penetrations & Field Fab 2nd Year RED

Stop if

Stop before changing structural support, rated construction, equipment handling, specialty materials, weatherproofing, engineered movement details, or manufacturer-specific requirements without the responsible direction.

Watch out

Do not chain measurements floor to floor, enlarge an opening, or field-build a riser offset without approval.

Check

current drawings and approved details
grid/floor/location and measured conditions
photos showing the installation condition
relevant manufacturer, structural, architectural, or finish information
what has already been checked

Say this to your foreman

floor openings do not line up through the riser riser floor openings do not line up sleeve shifted vertical duct alignment establish the actual opening locations from durable control points on each floor before fabricating offsets or forcing the riser. determine whether the error is in the openings, sleeves, layout, or current route. i measured the riser openings from the same grid lines on three floors, and the middle opening is shifted. can we verify whether the opening, sleeve, or duct route is being corrected before i release an offset?

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