1. What Is Fillet Weld Size Calculation?

Fillet weld size calculation determines the appropriate weld size based on throat thickness. This is essential for ensuring structural integrity and proper load distribution in welded joints.

2. How Does The Calculator Work?

The calculator uses the fillet weld size formula:

Where:

• \( WS \) — Weld size (leg length)
• \( T \) — Throat thickness

Explanation: The formula calculates the required leg length of a fillet weld based on the throat thickness, which is the shortest distance from the root to the face of the weld.

3. Importance Of Weld Size Calculation

Details: Proper weld sizing is critical for structural integrity, fatigue resistance, and ensuring the weld can withstand applied loads without failure.

4. Using The Calculator

Tips: Enter the throat thickness in millimeters. The calculator will compute the corresponding weld size (leg length).

5. Frequently Asked Questions (FAQ)

Q1: What is throat thickness in welding?
A: Throat thickness is the shortest distance from the root to the face of a fillet weld, representing the effective size that resists shear stress.

Q2: Why is the √2 factor used in the formula?
A: The √2 factor accounts for the 45-degree geometry of a standard fillet weld, where the leg length is √2 times the throat thickness.

Q3: What are typical weld size ranges?
A: Fillet weld sizes typically range from 3mm to 20mm, depending on material thickness and application requirements.

Q4: When should weld size be increased beyond calculated values?
A: Weld size may need to be increased for dynamic loading conditions, fatigue applications, or when welding dissimilar thickness materials.

Q5: Are there standards governing fillet weld sizes?
A: Yes, various standards (AWS, ISO, EN) provide guidelines for minimum and maximum fillet weld sizes based on material thickness and application.