Grade 8.8 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. Non-preloaded Ordinary Bolts. Grade 8.8 Bolts per. S355

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

Non-preloaded Ordinary Bolts

  • 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.

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