Transition Rotation: Confirm Top, Bottom, and Flat Side Before It Goes Up
A transition can match both end sizes and still be clocked wrong. Mark top, bottom, airflow direction, and any flat side that must hold elevation or clear structure before installation.
I verified both end sizes and marked top and airflow. The drawing holds the bottom flat, but this fitting is built top-flat-can we confirm whether it is rotated wrong before we install it?
Watch out
Do not rotate a transition in the air until it appears to fit if that changes the required flat side, elevation, access, or airflow path.
Check
Identify both end sizes and connector types.
Mark top and airflow direction on the fitting.
Confirm which side stays flat and which sides taper from the current drawing or field condition.
Check nearby beams, ceilings, piping, access, and equipment collars before raising it.
Steps
Identify both end sizes and connector types.
Mark top and airflow direction on the fitting.
Confirm which side stays flat and which sides taper from the current drawing or field condition.
Check nearby beams, ceilings, piping, access, and equipment collars before raising it.
Say this to your foreman
I verified both end sizes and marked top and airflow. The drawing holds the bottom flat, but this fitting is built top-flat-can we confirm whether it is rotated wrong before we install it?