2.1. Engineering News Formula

Try these first

1. 1.

   What is the minimum thickness of cushioning material recommended for piles?

   Hint

   Think about the protective measures needed.

2. 2.

   What do we use to calculate the safe load on piles?

   Hint

   Recall the formula we discussed earlier.

3. 3.

   What is the purpose of the Engineering News Formula?

   • To calculate the stability of soil
   • To determine safe load of piles
   • To measure water table levels

   Hint

   Think about the aspects of pile installation.

4. 4.

   True or False: Piles experience more stress during installation than during service.

   • True
   • False

   Hint

   Consider the phases of pile life.

5. 5.

   You have a hammer weighing 300 pounds that drops from a height of 9 feet into the ground. The pile penetrates 6 inches. What is the calculated safe load on the pile?

   Hint

   Break down the units carefully and remember to convert inches to feet.

6. 6.

   Explain how using a heavier hammer but with a lower height of drop can benefit a pile's integrity.

   Hint

   Think about how energy and velocity relate to stress.