Civil MDC

# Capacities of Non-Preloaded Hexagon Head Bolts to BS5950-1:2000

The capacity of non-preloaded hexagon head bolts can vary depending on the specific design code and standard being used. However, I can provide you with general guidelines on how to calculate the capacities of non-preloaded hexagon head bolts based on commonly used design codes.

Shear Capacity:

The shear capacity of a non-preloaded hexagon head bolt is typically calculated using the following formula: Vc = 0.6 * Av * fu / γm2
where Vc is the shear capacity, Av is the shear area of the bolt, fu is the ultimate tensile strength of the bolt material, and γm2 is the partial safety factor for bolt shear.
Tension Capacity:

The tension capacity of a non-preloaded hexagon head bolt can be calculated using the following formula: Tc = 0.9 * As * fu / γm2
where Tc is the tension capacity, As is the tensile stress area of the bolt, fu is the ultimate tensile strength of the bolt material, and γm2 is the partial safety factor for bolt tension.
The values of Av and As for different bolt sizes can be obtained from design standards or manufacturer’s documentation. The ultimate tensile strength (fu) depends on the material grade of the bolt and can also be obtained from relevant design standards or manufacturer’s specifications. The partial safety factor (γm2) is determined by the design code being used.

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