Highest Grade Friction Grip HSFG) Bolt Loading Capacities Table

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

Bolt Loading Capacities Table

Highest Grade Friction Grip (HSFG) Bolts

Non - Preloaded HSFG Bolts
Highest Grade HSFG Bolts Material S355

Diameter of Bolt mm	Tensile Stress Area A t mm²	Tension Capacity		Shear Capacity		Bearing Capacity in kN (Minimum of P bb and P bs ) End distance equal to 2 x bolt diameter Thickness in mm of material passed through
Diameter of Bolt mm	Tensile Stress Area A t mm²	Nominal 0.8 A_t p_t P nom kN	Exact A_t p_t P_t kN	Single Shear P_s kN	Double Shear 2P_s kN	5	6	7	8	9	10	12	15	20	25	30
16	157	87.9	110	62.8	126	44.0	52.8	61.6	70.4	79.2	88.0	106	132	176	220	264
20	245	137	172	98.0	196	55.0	66.0	77.0	88.0	99.0	110	132	165	220	275	330
22	303	170	212	121	242	60.5	72.6	84.7	96.8	109	121	145	182	242	303	363
24	353	198	247	141	282	66.0	79.2	92.4	106	119	132	158	198	264	330	396
27	459	257	321	184	367	74.3	89.1	104	119	134	149	178	223	297	371	446
30	561	314	393	224	449	82.5	99.0	116	132	149	165	198	248	330	413	495

The tensile stress area (A_t ) is obtained from standards

The tension capacity of the bolt is given by:

P_nom = 0.8p_tA_t Nominal

P_t = p_tA_t Exact

Where:

p_t is the tension strength of the bolt.

The shear capacity of the bolt is given by

P_S = p_s A_s

where:

p_s is the shear strength of the bolt
A_s 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.

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