What is the safe bearing capacity of firm compressed sand?

The safe bearing capacity of firm compressed sand is recognized as approximately 8,000 pounds per square foot (psf). This value is based on engineering principles that consider various factors, including the type of sand, its degree of compaction, and the underlying geology. Firm compressed sand has stable characteristics, and when properly compacted, it can support significant loads, making it a suitable choice for foundational applications in construction.

Using the 8,000 psf value allows engineers and contractors to assess the structural loads that can be safely applied to foundations built on this material. This ensures that the foundation will not settle excessively or fail, maintaining both safety and durability in the construction of commercial pools and other structures.

Recognizing that the other options represent values that are generally beyond what firm compressed sand can safely support under typical conditions illustrates the importance of understanding soil mechanics in construction and design.