1. Floor Topping (optional, not shown): Gypsum concrete,
lightweight or normal concrete topping.
2. Floor Sheathing: Minimum 23/32 inch thick tongue-and-groove
wood sheathing (Exposure 1). Installed per code requirements with minimum
8d common nails and glued to joist top flanges with AFG-01 construction
adhesive.
3. Insulation: Minimum 1-1/2 inch thick mineral wool
insulation batts – 2.5 pcf (nominal), supported by furring channels.
4. Structural Members: Wood I-joists spaced a maximum
of 24 inches on center.
| |
Minimum I-joist flange depth: 1-1/2 inches |
Minimum I-joist flange area: 5.25 inches2 |
| |
Minimum I-joist web thickness: 3/8 inch |
Minimum I-joist depth: 9-1/4 inches |
| |
| Types of Adhesives Used in Tested I-Joists |
| Flange-to-Flange Endjoint |
Flange-to-Web Joint |
Web-to-Web Endjoint |
| Resorcinol-Formaldehyde |
Phenol-Resorcinol-Formaldehyde |
Phenol-Resorcinol-Formaldehyde |
5. Furring Channels: Minimum 0.026 inch thick galvanized
steel hat-shaped furring channels, attached perpendicular to I-joists using
1-5/8 inch long drywall screws. Furring channels spaced 16 inches on center
and doubled at each wallboard end joint extending to the next joist.
6. Gypsum Wallboard: Minimum 5/8 inch thick Type C gypsum
wallboard installed with long dimension perpendicular to furring channels
and fastened to each channel with minimum 1-1/8 inch long Type S drywall
screws. Fasteners spaced 12 inches on center in the field of the wallboard, 8 inches on center at wallboard end joints, and 3/4 inches from panel edges and ends. End joints of wallboard staggered.
7. Finish System (not shown): Face layer joints covered with tape and coated with joint compound. Screw heads covered with joint compound.
| |
Fire Test conducted at Gold Bond Building Products Research Center |
February 9, 1990 |
| |
Third Party Witness: Warnock Hersey International, Inc. |
Report No: WHI-651-0311.1 |
|
STC and IIC Sound Ratings for Listed Assembly |
| Without Gypsum Concrete |
With Gypsum Concrete |
| Cushioned Vinyl |
Carpet & Pad |
Cushioned Vinyl |
Carpet & Pad |
| STC |
IIC |
STC |
IIC |
STC |
IIC |
STC |
IIC |
| - |
- |
- |
- |
- |
- |
49 b |
59 b |
| a This assembly may also be used in a fire-rated roof/ceiling application, but only when constructed exactly as described. |
| b STC and IIC values estimated by David L. Adams Associates, Inc |
Copyright © 2002, 2007
AMERICAN WOOD COUNCIL
AMERICAN FOREST & PAPER ASSOCIATION, INC
February 2007
|
