Highest Grade Friction Grip HSFG) Bolt Loading Capacities Table

Engineering ISO Metric Hardware Design Data
Engineering ANSI Hardware Design Data

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
Nominal
0.8 At pt
P nom
kN
Exact
At pt Pt
kN
Single
Shear Ps
kN
Double
Shear 2Ps
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 (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.

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