Construction Supervisor License Practice Exam

What is the allowable net bearing pressure of sandy gravel in pounds per square foot?

1. 1,000

2. 1,500

3. 2,000

4. 3,000

The correct answer is: 3,000

The allowable net bearing pressure for sandy gravel is indeed 3,000 pounds per square foot. This high bearing capacity is due to the granular nature of sandy gravel, which allows it to distribute load effectively without excessive settlement. The engineering properties of sandy gravel, including its density and compaction, contribute to its strength and stability. When properly compacted, sandy gravel can support significant loads, making it a suitable material for foundations and other construction applications. It is important to consider factors such as soil moisture, compaction, and the presence of contaminants, which can affect the actual bearing capacity on a specific site. Engineers often refer to geotechnical studies to confirm these capacities based on local conditions, but as a general rule, sandy gravel is rated at this level.