Minimum Length of Borehole in Feet Calculator

Length of Borehole Formula:

\[ L = (2 \times D_h) \]

Minimum Length (ft):

Maximum Length (ft):

1. What is Minimum Length of Borehole Calculator?

Definition: This calculator estimates the minimum and maximum length of a borehole based on its diameter and a specified tolerance percentage.

Purpose: It helps drilling professionals and engineers determine the acceptable range for borehole length in construction and geotechnical projects.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ L = (2 \times D_h) \]

Where:

\( L \) — Length of borehole (feet)
\( D_h \) — Diameter of borehole (feet)

Explanation: The basic length is twice the diameter, with tolerance applied to determine minimum and maximum acceptable lengths.

3. Importance of Borehole Length Calculation

Details: Proper borehole length estimation ensures structural stability, proper anchoring, and compliance with engineering specifications.

4. Using the Calculator

Tips: Enter the borehole diameter in feet and tolerance percentage (default ±5%). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is length twice the diameter?
A: This is a standard engineering rule of thumb for minimum borehole length to ensure stability.

Q2: What's a typical tolerance percentage?
A: ±5% is common, but this may vary based on project requirements and material properties.

Q3: When would I change the tolerance?
A: Adjust for different soil conditions, load requirements, or specific engineering standards.

Q4: How do I measure borehole diameter?
A: Use calipers or specialized borehole measurement tools after drilling.

Q5: Does this apply to all borehole types?
A: This is a general rule; specific applications may require different calculations.