For soils classified as sandy gravel, foundation pressure shall not exceed how many PSF?

In foundation engineering, the classification of soil types is essential for determining the load-bearing capacity of the ground beneath structures. Sandy gravel is a type of granular soil that typically has good drainage characteristics and strength properties compared to many other soil types.

For sandy gravel specifically, the maximum allowable foundation pressure is often determined by factors such as the soil's density, grain size, and compaction level. In many construction guidelines and engineering standards, the allowable foundation pressure for sandy gravel is commonly accepted to be around 3000 pounds per square foot (PSF). This value allows for safe and stable support for various structures, taking into consideration potential factors like settlement and load distribution.

Therefore, selecting 3000 PSF as the maximum foundation pressure for sandy gravel reflects the typical engineering practices and standards set in the construction industry, ensuring that structures built on this type of soil maintain their integrity and safety.