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Home > CAD & Revit - Mass Timber > Shaft Wall Assembly at Non-Rated Floor & 2-Hr Shaft with Concrete Turned Down Beam
19-6-SHAFT-WALL-ASSEMBLY-@-3-PLY-CLT---CONC.-CURB---NON-RATED-FLOOR-2HR-SHAFT

Shaft Wall Assembly at Non-Rated Floor & 2-Hr Shaft with Concrete Turned Down Beam

Description: Intermediate floor transition at shaft. 3-ply CLT cannot be in the shaft wall assembly so the turned down concrete beam provides the transition between floors where no beam is present.

Purpose: Shaft wall assembly at intermediate floors with glulam beam support.

 

Design Notes

  • Reinforced self-supporting concrete turned down beam used to support the shaft wall and maintain rating.
  • CLT floor outboard of shaft wall assembly.
  • Formwork and shoring required to cast turned down concrete beam where glulam beam is not present.

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.
Const.
Constructability Advanced
Fire
Fire Rated Up To 2 Hours

Related Mass Timber

Shaft Wall Assembly at Non-Rated Floor & 2-Hr Shaft with Concrete Turned Down Beam

Intermediate floor transition at shaft. 3-ply CLT cannot be in the shaft wall assembly so the turned down concrete beam provides the transition between floors where no beam is present.
19-6-SHAFT-WALL-ASSEMBLY-@-3-PLY-CLT---CONC.-CURB---NON-RATED-FLOOR-2HR-SHAFT