What is the scale distance factor beyond 5000 feet?

What is the scale distance factor beyond 5000 feet?

• A. 55
• B. 65
• C. 300
• D. 5000

Answer: (B)

A scale distance factor is a value used in blasting safety charts to relate distance to expected blast effects, guiding design and compliance decisions. In this chart, the factor used for distances up to 5000 feet is 55, while for distances beyond 5000 feet it increases to 65. The increase reflects how the attenuation characteristics change with longer distances and keeps predictions conservative for potential air blast and ground vibrations at greater ranges. The other numbers don’t fit the standard table for this question: 55 is for closer distances, and 300 or 5000 are not the scale distance factors used in this context. So beyond 5000 feet, the scale distance factor is 65.

A scale distance factor is a value used in blasting safety charts to relate distance to expected blast effects, guiding design and compliance decisions. In this chart, the factor used for distances up to 5000 feet is 55, while for distances beyond 5000 feet it increases to 65. The increase reflects how the attenuation characteristics change with longer distances and keeps predictions conservative for potential air blast and ground vibrations at greater ranges. The other numbers don’t fit the standard table for this question: 55 is for closer distances, and 300 or 5000 are not the scale distance factors used in this context. So beyond 5000 feet, the scale distance factor is 65.