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Typical 3-Ply CLT Floor/Exposed Ceiling Assembly

Description:

  • Minimum 3/4″-thick floor topping with minimum compressive strength of 1800 psi; reinforce topping slab as required
  • Sound insulation board
  • CLT panels

Purpose: CLT floor assembly with concrete/gypsum topping (ceiling side exposed)

Design Notes

Topping options:

  • Normal or lightweight concrete
  • Gypsum concrete floor

Sound insulation options:

  • Thickness varies; thicker mat will provide better acoustic separation

Acoustics:

  • 3-ply CLT (3.5″ total thickness) with 3″ normal weight concrete with Maxxon Acousti-Mat III (3/4″-thick) = IIC 45 & STC 53

Fire:

  • Non-rated 3-ply CLT 1 1/2-hr rating possible: 5-ply CLT Design No. L901
Const.
Constructability Easy
Fire
Fire Rated Up To 1-1/2 Hours

Typical 3-Ply CLT Floor/Exposed Ceiling Assembly

17-1-TYPICAL-FLOOR-CLG-ASSEMBLY