| Diameter of bolt | Tensile stress area | Tension resistance | Shear resistance | Bolts in tension | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single shear | Double shear | Min. thickness for punching shear | |||||||||||||
| d | As | Ft,Rd | Fv,Rd | 2 x Fv,Rd | tmin | ||||||||||
| mm | mm2 | kN | kN | kN | mm | ||||||||||
| 12 | 84.3 | 24.3 | 16.2 | 32.4 | 1.6 | ||||||||||
| 16 | 157 | 45.2 | 30.1 | 60.3 | 2.4 | ||||||||||
| 20 | 245 | 70.6 | 47.0 | 94.1 | 3.0 | ||||||||||
| 24 | 353 | 102 | 67.8 | 136 | 3.6 | ||||||||||
| 30 | 561 | 162 | 108 | 215 | 4.4 | ||||||||||
| Diameter of bolt | Minimum | Bearing resistance (kN) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| End distance | Edge distance | Pitch | Gauge | ||||||||||||
| d | e1 | e2 | p1 | p2 | Thickness in mm of ply | ||||||||||
| mm | mm | mm | mm | mm | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 15 | 20 | 25 | 30 |
| 12 | 25 | 20 | 35 | 40 | 34.8 | 41.7 | 48.7 | 55.6 | 62.6 | 69.6 | 83.5 | 104 | 139 | 174 | 209 |
| 16 | 35 | 25 | 50 | 50 | 49 | 58.8 | 68.6 | 78.4 | 88.3 | 98.1 | 118 | 147 | 196 | 245 | 294 |
| 20 | 40 | 30 | 60 | 60 | 55.5 | 66.5 | 77.6 | 88.7 | 99.8 | 111 | 133 | 166 | 222 | 277 | 333 |
| 24 | 50 | 35 | 70 | 70 | 68.8 | 82.5 | 96.3 | 110 | 124 | 138 | 165 | 206 | 275 | 344 | 413 |
| 30 | 60 | 45 | 85 | 90 | 83.2 | 99.8 | 116 | 133 | 150 | 166 | 200 | 250 | 333 | 416 | 499 |
For Class 8.8 and 10.9 M12 bolts the design shear resistance Fv,Rd has been calculated as 0.85 times the value given in BS EN 1993-1-8, Table 3.4 (§3.6.1(5))
See Clause 3.7(1) of BS EN 1993-1-8: 2005 for calculation of the design resistance of a group of fasteners
Values of bearing resistance in bold are less than the single shear resistance of the bolt
Values of bearing resistance in italic are greater than the double shear resistance of the bolt
Bearing values assume standard clearance holes
If oversize or short slotted holes are used, bearing values should be multiplied by 0.8
If long slotted or kidney shaped holes are used, bearing values should be multiplied by 0.6
In single lap joints with only one bolt row, the design bearing resistance for each bolt should be limited to 1.5fu d t / γM2