Backside Riser Flange Hardware Cannot Be Reached

The riser joint fits, but the shaft-side corner and cleat cannot be reached after the section lands. I checked access from both floors. Do you want the joint orientation or installation sequence changed before we set it?

Joints, TDC, Flanges & Connections 2nd Year YELLOW

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 leave hidden hardware incomplete or assume sealant from the reachable side fixes an unmade joint.

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

backside riser flange hardware cannot be reached backside flange inaccessible shaft riser corner bolt cleat cannot reach stop before closing the shaft-side joint. verify access to every required corner, cleat, bolt, gasket edge, seal point, and inspection surface while the section can still be positioned. the riser joint fits, but the shaft-side corner and cleat cannot be reached after the section lands. i checked access from both floors. do you want the joint orientation or installation sequence changed before we set it?

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