Refer to the exhibit.

The detail shows a steel runner with sheetrock and screws, typical for drywall suspended ceiling assemblies.

This construction method is commonly used in concrete frame buildings with drywall ceilings suspended below the structural slab.

It helps prevent cracking by accommodating building movement and separating finish materials from structural movement.

Structural steel frame buildings with plaster ceilings typically have different finish and framing details.

Concrete flat slabs with exposed ceilings have no finish requiring such assemblies.

Exposed steel frames without partitions don’t need drywall framing.