1. What is Allowable Bearing Stress for Milled Surface?

Definition: This calculator determines the allowable bearing stress for milled surfaces including bearing stiffeners, based on the yield stress of steel and a specified tolerance.

Purpose: It helps structural engineers and designers ensure that bearing stresses on milled surfaces remain within safe limits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( F_p \) — Allowable bearing stress (MPa)
• \( F_y \) — Yield stress of steel (MPa)

Explanation: The allowable bearing stress is calculated as 90% of the steel's yield stress, with an optional tolerance range applied.

3. Importance of Allowable Bearing Stress Calculation

Details: Proper calculation ensures structural integrity, prevents material failure, and complies with engineering standards for milled surfaces and bearing stiffeners.

4. Using the Calculator

Tips: Enter the yield stress of steel in MPa and the tolerance percentage (default ±5%). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the factor 0.9 used?
A: The 0.9 factor is a safety coefficient that accounts for uncertainties and provides a margin below the yield stress.

Q2: What's a typical yield stress for structural steel?
A: Common values range from 250 MPa to 690 MPa depending on the steel grade.

Q3: When would I adjust the tolerance?
A: Adjust tolerance based on project specifications, material variability, or when accounting for dynamic loads.

Q4: Does this apply to all steel surfaces?
A: This specifically applies to milled surfaces with bearing stiffeners. Other surfaces may have different allowable stresses.

Q5: How does this relate to building codes?
A: This calculation aligns with standard engineering practices and building code requirements for bearing stress limits.

Allowable Bearing Stress Calculator© - All Rights Reserved 2025