1. What is a Log Rule Board Feet Calculator?

Definition: This calculator estimates the board feet of lumber that can be obtained from a log using either the Doyle or Scribner log rules.

Purpose: It helps loggers, sawmill operators, and forestry professionals estimate lumber yield from logs.

2. How Does the Calculator Work?

The calculator uses one of these formulas based on selected rule:

Where:

• \( BF \) — Board feet of lumber
• \( D \) — Log diameter (inches)
• \( L \) — Log length (feet)

Explanation: The formulas estimate lumber yield accounting for saw kerf and other milling factors.

3. Importance of Log Rules

Details: Log rules help standardize lumber volume estimation for fair trade and accurate inventory management.

4. Using the Calculator

Tips: Enter the log diameter in inches, length in feet, and select either Doyle or Scribner rule.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Doyle and Scribner rules?
A: Doyle tends to underestimate small logs and overestimate large logs, while Scribner is more consistent but generally gives lower estimates.

Q2: Which rule should I use?
A: Doyle is common in eastern US hardwood regions, while Scribner is often used for softwoods in the west.

Q3: How do I measure log diameter?
A: Measure the small-end diameter inside the bark (DIB) in inches.

Q4: Are there other log rules?
A: Yes, including International 1/4" Rule and Cubic Volume Rule, but Doyle and Scribner are most common.

Q5: Does this account for log taper?
A: These rules assume some standard taper. For very tapered logs, measurements should be adjusted.