The drawing illustrates a mechanical shaft opening in a floor assembly, indicating dimensions for the floor opening size and clearances. Component callouts include the mechanical shaft label and detail reference marker 1S2. Dimension lines provide positioning relative to grid lines or adjacent structure.
Text on the drawing
8' - 4" 1' - 0" MECHANICAL SHAFT 1S2 FL. OPNG. 4' - 10" 1' - 10" FL. OPNG. 4' - 10" 1' - 11" 6' - 9" 1' - 1" 6" 7' - 9"
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