5

100

tc ' 10

' 9 inches

200

from figure 3-1, minimum tc = h h1; tc = *7+ *2 = 9 inches.

weighing 1,000 pounds per linear foot should be designed.

Thickness = 4 inches

Flexural strength = 600 pounds per square inch

Modulus of subgrade reaction k = 200 pounds per cubic inch

1,000 pounds per linear *foot. *Thickness t should be adjusted based on modulus of subgrade reaction, k =

200 pounds per cubic inch.

5

100

' 8.7

te ' 10

200

For thickened slab configuration, see table 3-3.

For other practical considerations, i.e., frost line, erosion etc., the thickness, te, may be increased.

reinforcing the slab using 60,000-pounds per square inch yield strength steel reinforcement. The percent

reinforcement required for the 6-inch slab should be determined.

and extend line to S. This should read S = 0.13 percent.

tank has a gross weight of 60 kips, Traffic is limited to 40 vehicles per day.

Material Properties:

Concrete flexural strength = 700 pounds per square inch

Modulus of subgrade reaction, k = 100 pounds per cubic inch

second tabulation in paragraph 3-2. From first tabulation in paragraph 3-2 for category II, forklift truck axle

load is 10 to 15 kips. Table 5-1 is entered using 15 kips. Loaded at a frequency of 100 operation per day, the

design index is 7. Figure 5-1 is entered using concrete flexure strength = 700 pounds per square inch, k = 100

pounds per cubic inch and DI = 7, slab thickness, h = 6.6 inches, or if rounded, 7 inches.

C-2