Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Shear Area Square Millimeters (mm²)

Required number input.

Allowable Shear Megapascals (MPa)

Required number input.

Nominal single-shear force from bolt shear area times a user-supplied allowable shear stress; not a code-rated connection capacity. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Allowable Force Newtons (N)

The resulting allowable force newtons returned as a number.

• Connection capacity depends on material grades, geometry, edge distance, pretension, threads, weld quality, prying, combined actions, fatigue, corrosion, and code resistance factors. A single tensile, shear, or stress check is not a complete connection design.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Bolt Tensile Capacity

  Nominal axial force from bolt tensile stress area times a user-supplied allowable tensile stress; excludes prying and interaction.

• Fillet Weld Strength

  Idealized fillet weld force from effective throat area and a supplied allowable throat shear stress; excludes code factors.

• Cable Sizing Current Capacity

  Usable conductor current rating from a supplied base ampacity times installation and temperature derating factors; not a code sizing determination.