1. What is Thickness of Bottom Plate in T-Joints?

Definition: This calculator determines the required thickness of the bottom plate in T-joint welds based on fillet leg length and transverse shrinkage.

Purpose: It helps welding professionals ensure proper joint strength and account for material shrinkage during cooling.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( t_b \) — Thickness of bottom plate (meters)
• \( h_t \) — Length of fillet leg in T-joint (meters)
• \( s \) — Transverse shrinkage (meters)

Explanation: The formula accounts for the relationship between weld size, material shrinkage, and required plate thickness to maintain joint integrity.

3. Importance of Proper Plate Thickness

Details: Correct thickness calculation prevents weld failure, ensures structural integrity, and accounts for material shrinkage during cooling.

4. Using the Calculator

Tips: Enter the fillet leg length, transverse shrinkage (default 0.004m), and tolerance percentage (default ±5%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is typical transverse shrinkage for steel?
A: For mild steel, transverse shrinkage is typically about 0.004m, but varies with material and welding process.

Q2: Why include a tolerance percentage?
A: The tolerance accounts for material variations and practical manufacturing considerations (±5% is common).

Q3: How do I measure fillet leg length?
A: Measure from the root of the joint to the toe of the fillet weld along the leg.

Q4: Does this apply to all welding processes?
A: The formula is most accurate for arc welding processes; other methods may require adjustments.

Q5: What if my shrinkage value is unknown?
A: Use 0.004m as a default for mild steel, or consult material specifications for exact values.

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