4-Way® Floor Deck
Homasote
4-way Floor Decking is a structural, noise-deadening subfloor and insulating,
carpet underlayment made from multiple plies of Homasote® structural
building board permanently bonded under extreme pressure with a water-resistant
glue, trimmed to size and shaped with tongue-and-groove to form floor
decking panels. 4-Way is used as a structural sub-flooring in low-rise
condominium and apartment developments, motels, nursing homes, professional
buildings and private homes, especially where noise control is a prime
consideration.
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Advantages
- Laboratory tested for acoustical ratings using ISO, R140
and HUD test methods
- Resilient surface provides in-place, wall-to-wall underlayment
that will protect carpeting and prolong life beyond the ability of concrete
or hardwood surfaces
- Moisture-resistant and protected against termites, rot and
fungi
- Homasote annular thread nails, #3190, (3" long, 9 ga., annular
threaded shank, 3/8" head), are available for glue-nail application
- Adequately supports uniform live loads up to 100 lbs./sq.
ft. based on a maximum deflection of 1/360 of the span
Sizes & Weights (nominal)
| Panel thickness |
Size |
Weight |
Joists |
| 1-11/32" |
2' x 8', 4' x 8' |
3.0 lb./sq. ft. |
16" o.c. |
| 1-3/4" |
2' x 8', 4' x 8' |
4.1 lb./sq. ft. |
24" o.c. |
NOTE: Finished T&G on long edges and square on ends. Estimate 65 panels (2' x 8') or 32 panels (4' x 8') per 1000 sq. ft. of floor.
Typical Physical Properties
| Density: |
26-28 lb./ft.3 |
| Tensile, parallel to surface
(min.): |
450-700 psi |
| Transverse, MOR (min.): |
750-1000 psi |
| Stiffness, MOE (min.): |
86,000 psi |
| Hardness, Janka Ball (min.): |
230 lb. |
Water absorption by volume
(max.):
2 hrs. immersion
24 hrs. immersion |
5%
15% |
Expansion from 50%-90%
relative humidity (max.): |
0.25% |
| R-Value (1-11/32"): |
3.27 |
| R-Value (1-3/4"): |
4.46 |
| Flame Spread: |
Class III (or C) |
Other Test Data
1 Hour Full-Scale Fire Performance, Tested in Accordance with ASTM E119-98 by Southwest Research Institute, Project No. 01-2271-001; UL Floor Design Number L528 – 1-3/4" 4-Way.
1 Hour Full-Scale Fire Performance, Tested in Accordance with ASTM E119 by Factory Mutual Corp., Project No. 16738.40; UL Floor Design Number L517 – 1-11/32" 4-Way.
NAHB Research Foundation, Glue-nail Structural Tests, March, 1971.
S.B. Barnes & Assoc., Horizontal Diaphragm Test, 1972
Fire rated: 1 hr. (per Factory Mutual Test)
Design F.C.: 77 1 hr.(S/N 16738-40)
Code Compliance
BOCA Research Report 84-65
SBCC Report 8653
ICBO Report 1016
FHA Materials Release 1150c
CMHC Report No. 11924