Structural Bolt Shear and Tensile Resistances — Design Calculator

This tool provides the factored shear and tensile resistances for common structural bolt grades used in steel construction, helping engineers quickly verify connection capacity during design and detailing. Bolt performance depends on several factors, including bolt diameter, grade, installation method, and whether the connection is bearing-type, slip-critical, or tension-controlled. Accurate bolt resistance values are essential for developing safe, efficient steel connections — especially in moment connections, splice plates, bracing gussets, and heavy industrial framing.

Because bolts are one part of a larger force-transfer system, it is equally important to understand how loads move through a connection and into the surrounding structure. For a deeper explanation of how axial, shear, moment, and torsional forces travel through beams, columns, bracing, and joints, see our full guide on How Forces Actually Travel Through Buildings

In addition to strength checks, engineers must also consider how fatigue failures in steel connections can develop over time due to repeated loading, vibration, and environmental exposure, even when bolts satisfy factored shear and tensile resistance requirements.

Over the long term, whether a connection distress remains localized or escalates into a larger structural problem depends on the structural redundancy of the system and the availability of alternate load paths to redistribute forces after localized damage.