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

High Strength Friction Grip (HSFG) Bolts

General Grade HSFG Bolts Material S355

 Diameter of Bolt mm Tensile Stress Area At mm² 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 ply passed through Nominal 0.8 At pt P nom kN Exact At pt Pt kN Single Shear Ps kN Double Shear 2 Ps kN 5 6 7 8 9 10 12 15 20 25 30 12 84.3 39.8 49.7 33.7 67.4 33.0 39.6 46.2 52.8 59.4 66.0 79.2 99.0 132 165 198 16 157 74.1 92.6 62.8 126 44.0 52.8 61.6 70.4 79.2 88.0 106 132 176 220 264 20 245 116 145 98.0 196 55.0 66.0 77.0 88.0 99.0 110 132 165 220 275 330 22 303 143 179 121 242 60.5 72.6 84.7 96.8 109 121 145 182 242 303 363 24 353 167 208 141 282 66.0 79.2 92.4 106 119 132 158 198 264 330 396 27 459 189 236 161 321 74.3 89.1 104 119 134 149 178 223 297 371 446 30 561 231 289 196 393 82.5 99.0 116 132 149 165 198 248 330 413 495

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.