Felling Direction Bias Index for Sloped Terrain Calculator

Quick Answer

Calculate Felling Direction Bias Index for Sloped Terrain

Result Interpretation

Felling Direction Bias Index for Sloped Terrain Calculator computes Felling Direction Bias Index in dimensionless using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

Tree Mass = 1200
Tree Height = 25
Slope Angle = 0

Expected Result:

Felling Direction Bias Index = 0

Engineering Interpretation:

Under the given input conditions, the calculated result is: Felling Direction Bias Index = 0 dimensionless.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

felling direction bias index = (slope angle * 3.14159265358979 / 180.0 * sin(slope angle * 3.14159265358979 / 180.0)) / (cos(slope angle * 3.14159265358979 / 180.0) * 0.5)

Formula family: formula_forestry_felling_direction_bias_index_calculator_for_sloped_terrain

Variables

Symbol	Label	Role	Description
slope_angle_deg	Slope Angle	INPUT	Slope Angle
tree_height_m	Tree Height	INPUT	Tree Height
tree_mass_kg	Tree Mass	INPUT	Tree Mass
felling_direction_bias_index	Felling Direction Bias Index	OUTPUT	Felling Direction Bias Index

Calculation Steps

Enter the slope angle in deg.
Enter the tree height in m.
Enter the tree mass in kg.
Step 1: Compute felling direction bias index.
Read the felling direction bias index (dimensionless) from the results.

Engineering Summary

Calculate Felling Direction Bias Index for Sloped Terrain

Frequently Asked Questions

What does this calculator calculate?

The Felling Direction Bias Index for Sloped Terrain Calculator estimates Felling Direction Bias Index based on the input parameters you provide

Why is slope angle important in this calculation?

slope angle is inversely proportional to felling direction bias index. When you enter slope angle in deg, the calculator uses it in the engineering formula to compute the output

How should I interpret the result felling direction bias index?

The calculator outputs felling direction bias index in dimensionless. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Slope Angle (deg), Tree Height (m), Tree Mass (kg). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment