(If total usable inside space is declared in a supplemental declaration, it shall be to the nearest cubic foot or cubic decimeter.)
TABLE III
Product Classification (Nominal Size) | Unseasoned | Minimum Dressed Sizes (See Notes i and ii) Dry |
Inches | Inches | Inches |
Dimension Lumber | ||
2 × 4 | 1-9/16 × 3-9/16 | 1-1/2 × 3-1/2 |
2 × 6 | 1-9/16 × 5-5/8 | 1-1/2 × 5-1/2 |
2 × 8 | 1-9/16 × 7-1/2 | 1-1/2 × 7-1/4 |
2 × 10 | 1-9/16 × 9-1/2 | 1-1/2 × 9-1/4 |
2 × 12 | 1-9/16 × 11-1/2 | 1-1/2 × 11-1/4 |
(See Note i) | ||
Board Lumber | ||
1 × 4 | 25/32 × 3-9/16 | 3/4 × 3-1/2 |
1 × 6 | 25/32 × 5-5/8 | 3/4 × 5-1/2 |
1 × 8 | 25/32 × 7-1/2 | 3/4 × 7-1/4 |
1 × 10 | 25/32 × 9-1/2 | 3/4 × 9-1/4 |
1 × 12 | 25/32 × 11-1/2 | 3/4 × 11-1/4 |
Note: The dry thickness of nominal 3-inch and 4-inch lumber is 2-1/2 inches and 3-1/2 inches; unseasoned thickness are 2-9/16 inches and 3-9/16 inches. Widths for these thicknesses are the same as shown above.
Additional Notes: Product Standard 20-70 defines dry lumber as being 19 percent or less in moisture content and unseasoned lumber as being over 19 percent moisture content. The size of lumber changes approximately 1 percent for each 4 percent change in moisture content. Lumber stabilizes at approximately 15 percent moisture content under normal use conditions.
Thickness-Weight (1 mil = 0.001 inches)
Width in Feet | 2 Mils Thick | 4 Mils Thick | 6 Mils Thick |
3 | 2.88 | 5.73 | 8.61 |
6 | 5.76 | 10.74 | 17.22 |
8 | 7.68 | 15.28 | 22.96 |
10 | 9.60 | 19.10 | 28.70 |
12 | 11.52 | 22.92 | 34.44 |
16 | 15.36 | 30.56 | 45.92 |
20 | 19.20 | 38.20 | 57.40 |
24 | 23.04 | 45.84 | 68.88 |
28 | 26.88 | 53.48 | 80.36 |
30 | 28.80 | 57.30 | 86.10 |
32 | 30.72 | 61.12 | 91.84 |
36 | 33.12 | 68.76 | 94.71 |
Notes: Weight for the various thicknesses per given 100 feet of length, with the width of the sheeting as the variable, are based on "industry-wide" standards appearing in Voluntary Product Standard 17-69, approved by the National Bureau of Standards on December 31, 1969.
The weight values are given as fractional parts of 1,000 square feet weights based on a sheet of polyethylene being 10 feet wide and 100 feet long, equalling 1,000 square feet. The basis of violation is a deficiency in weight, caused principally by insufficient thickness, or by deficiencies in length of width.
Tolerances: Thickness variance of ± 20 percent, but must average the specified thickness.
Length variance +3 percent (103 feet) to minus 1 percent (not less than 99 feet for the labeled 100 feet).
Width variance of 1/8 inch under one foot; 1/8 inch per number of feet wide (8 feet wide ± 1 inch).
W = T × A × 0.03613D, where
W = Net Weight in pounds
T = Nominal thickness in inches
A = Nominal length in inches times nominal width in inches
D = Density in grams per cubic centimeter as determined by ASTM Standard D1505-68 "Standard Method of Test for Density of Plastics by the Density Gradient Technique" (or latest issue). 0.03613 is a factor for converting g/cm3 to lb/in3.
(Example: Contents will cover 26 square feet when installed at a thickness equal to 6-1/2 inches with a resistance value of R-19. Net Weight 30 lb.)
(Example: Covers 26 square feet and provides a value of R-19. Roll is 12 inches wide by 26 feet long.)
(Example of application statement: Insulation covering 120 square meters of area has been installed in conformance with manufacturer's recommendations to provide a value of R-19.)
Ga. Comp. R. & Regs. R. 40-15-4-.02
O.C.G.A. Sec. 10-2-5.