Riser Orientation Mark Is Missing Before the Section Is Raised

This riser piece has no clear up/down or branch-direction mark. I matched the piece number, but it can be rotated two ways. Can we verify and mark the orientation before it is raised?

Field Basics, Safety & Access 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 assume a symmetrical-looking riser section can be flipped later.

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

riser orientation mark is missing before the section is raised riser orientation missing up down mark branch direction vertical duct mark the section orientation from the current drawings and adjacent connections before it enters the shaft. include floor, system, airflow, top, branch direction, and connector orientation as needed. this riser piece has no clear up/down or branch-direction mark. i matched the piece number, but it can be rotated two ways. can we verify and mark the orientation before it is raised?