Shaft Wall Assembly at Non-Rated Floor and 1-Hr Shaft with Concrete Turned Down Beam
3-ply CLT cannot be in the shaft wall assembly so the turned down concrete beam provides the transition from the shaft wall to the beam.
Shaft Wall Assembly at Non-Rated Floor and 1-Hr Shaft with Concrete Turned Down Beam
Description: 3-ply CLT cannot be in the shaft wall assembly so the turned down concrete beam provides the transition from the shaft wall to the beam.
Purpose: Shaft wall assembly at intermediate floors and glulam beams.
Design Notes
- Concrete turned down beam and glulam beam used to support the shaft wall and maintain rating.
- CLT floor outboard of the shaft wall assembly.
Acoustics:
- Shaft wall assembly estimated at STC 39-45 depending on layers of gypsum for shaft rating CLT floor 3-ply (3.5″) with 3/4″ acoustic mat and 3″ concrete = IIC 45 & STC 53.
Fire:
- Can be used to meet any shaft wall rating requirement based on size of glulam and associated char factor.
- Const.
- Constructability Moderate
- Fire
- Fire Rated Up To 2 Hours