See Explanatory notes given below table. BS 5950-1: 2000 BS 4190: 2001

 Diameter of Bolt Tensile Stress Area At Tension Capacity Shear Capacity Bearing Capacity in kN (Minimum of Pbb and Pbs) End distance equal to 2 x bolt diameter Thickness in mm of material passed through Nominal 0.8 At pt Exact At pt Single Shear Double Shear Pnom Pt Ps 2 Ps mm mm2 kN kN kN kN 5 6 7 8 9 10 12 15 20 25 30 12 84.3 37.8 47.2 31.6 63.2 33.0 39.6 46.2 52.8 59.4 66.0 79.2 99.0 132 165 198 16 157 70.3 87.9 58.9 118 44.0 52.8 61.6 70.4 79.2 88.0 106 132 176 220 264 20 245 110 137 91.9 184 55.0 66.0 77.0 88.0 99.0 110 132 165 220 275 330 22 303 136 170 114 227 60.5 72.6 84.7 96.8 109 121 145 182 242 303 363 24 353 158 198 132 265 66.0 79.2 92.4 106 119 132 158 198 264 330 396 27 459 206 257 172 344 74.3 89.1 104 119 134 149 178 223 297 371 446 30 561 251 314 210 421 82.5 99.0 116 132 149 165 198 248 330 413 495

• Values in bold are less than the single shear capacity of the bolt.
• Values in italic are greater than the double shear capacity of the bolt.
• Bearing values assume standard clearance holes.
• If oversize or short slotted holes are used, bearing values should be multiplied by 0.7.
• If long slotted or kidney shaped holes are used, bearing values should be multiplied by 0.5.
• If appropriate, shear capacity must be reduced for large packings, large grip lengths and long joints.

The tensile stress area (At ) is obtained from standards

The tension capacity of the bolt is given by:

Pnom = 0.8ptAt Nominal

Pt = ptAt Exact

Where:

pt is the tension strength of the bolt.

The shear capacity of the bolt is given by

PS = ps As

where:

ps is the shear strength of the bolt
As is the shear area of the bolt.

In the table, As has been taken as equal to At .

The shear capacity given in the tables must be reduced for large packings, large grip lengths, kidney shaped slots or long joints when applicable.