1.

The stub column shown in Exhibit 1 supports a steel column and base plate with the indicated loads. The stub column is 18 inches square and is reinforced with Grade 60 deformed bars. Concrete compressive strength is 2000 pounds per square inch. The stub column is subjected to axial load only and is effectively braced against side sway by the floor slab.

Exhibit 1

1. What is the effective length factor of the stub column?

   1. 0.65

   2. 0.80

   3. 1.00

   4. 1.20

2. The slenderness ratio is most nearly:

   1. 6

   2. 7

   3. 8

   4. 9

3. The design axial load strength of the stub column is most nearly:

   1. 330 kips

   2. 350 kips

   3. 370 kips

   4. 390 kips

4. The allowable reduced effective area of the section is most nearly:

   1. 160 square inches

   2. 170 square inches

   3. 180 square inches

   4. 190 square inches

5. The minimum allowable reinforcement area in the stub column is most nearly:

   1. 1.6 square inches

   2. 1.7 Square inches

   3. 1.8 square inches

   4. 1.9 square inches

6. The minimum allowable size of lateral ties is:

   1. No. 3

   2. No. 4

   3. No. 5

   4. No. 6

7. The maximum allowable tie spacing is most nearly:

   1. 10 inches

   2. 12 inches

   3. 14 inches

   4. 16 inches

2.

The fill behind the retaining wall in Exhibit 2 has a unit weight of 110 pounds per cubic foot with an equivalent fluid pressure of 30 pounds per square foot per foot. Passive earth pressure may be assumed equivalent to a fluid pressure of 300 pounds per square foot per foot and the coefficient of friction at the underside of...