Which of the following has the highest Load Bearing Value?

Which of the following has the highest Load Bearing Value?

• A. Bedrock
• B. Sand
• C. Gravel
• D. Clay

Answer: (A)

Load Bearing Value measures how much load a material can support per unit area without failing or excessive settlement. Bedrock is the strongest among the options because it’s solid, unweathered rock with extremely high shear strength and stiffness. It doesn’t compress or deform much under load, so foundations sitting on bedrock can carry very large forces with minimal settlement. Sand and gravel are granular soils that rely on interparticle friction and packing to carry load. They are strong enough for many foundations, but not nearly as stiff or resistant to settlement as bedrock. Clay, especially highly plastic varieties, is cohesive and can be quite compressible and susceptible to volume changes with moisture; this typically results in lower bearing capacity and more potential for settlement than sands or gravels. So, bedrock has the highest Load Bearing Value.

Load Bearing Value measures how much load a material can support per unit area without failing or excessive settlement. Bedrock is the strongest among the options because it’s solid, unweathered rock with extremely high shear strength and stiffness. It doesn’t compress or deform much under load, so foundations sitting on bedrock can carry very large forces with minimal settlement.

Sand and gravel are granular soils that rely on interparticle friction and packing to carry load. They are strong enough for many foundations, but not nearly as stiff or resistant to settlement as bedrock. Clay, especially highly plastic varieties, is cohesive and can be quite compressible and susceptible to volume changes with moisture; this typically results in lower bearing capacity and more potential for settlement than sands or gravels.

So, bedrock has the highest Load Bearing Value.