Welding Size Calculator

Design welded joints for crane structures according to AWS D1.1 and FEM 1.001.

1. Load & Configuration

kN

Degrees (0° Parallel, 90° Transverse)

mm (Per side)

2. Materials & Safety

Defines Safety Factor (γ)

mm (Thicker Part)

Design Output

FILLET WELD SIZE

Required Leg Size (w): 0.0 mm
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Design Load (Factored): 0 kN
Joint Capacity: 0 kN
Safety Margin: 0%
AWS D1.1 Check
Min Practical Size: 0 mm
Max Size (Edge): 0 mm
Calculated for Directional Strength

Directional

Uses AWS/FEM directional strength method. Transverse loads (90°) allow for higher weld capacity than parallel loads (0°).

Safety

Applies safety factors ($\gamma_{mw}$) ranging from 1.25 to 1.55 based on the selected crane duty class.

Limits

Checks minimum weld size based on plate thickness (AWS D1.1 Table 5.8) to prevent cracking.

Understanding Weld Sizing

Welded joints in cranes must withstand dynamic loads and fatigue. This calculator sizes fillet welds based on the applied load, load angle, and electrode strength, ensuring compliance with AWS D1.1 and FEM 1.001.

Inputs Explained

  • Applied Load (P): The force the joint must transmit.
  • Load Angle (θ): The angle between the weld axis and the force.
    • 0° (Parallel): Shear load (weakest direction).
    • 90° (Transverse): Tension/Compression (strongest direction).
  • Weld Length (L): The effective length of the weld.
  • Electrode Classification: The tensile strength of the weld metal (e.g., E70xx = 70 ksi ≈ 490 MPa).
  • Duty Class: Determines the safety factor (γ) to account for fatigue and reliability.

Outputs Explained

  • Required Leg Size (w): The physical dimension of the weld leg needed to carry the load.
  • Joint Capacity: The maximum factored load the specified weld can safely carry.
  • AWS D1.1 Limits: Checks if the calculated size meets minimum thickness requirements to prevent rapid cooling cracks.