Other - Bolts Welds - Class 10.9 Hexagon head bolts - 1A. Bolt resistances - Non-preloaded-355

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Diameter of bolt	Tensile stress area	Tension resistance	Shear resistance		Bolts in tension
Diameter of bolt	Tensile stress area	Tension resistance	Single shear	Double shear	Min. thickness for punching shear
d	A_s	F_t,Rd	F_v,Rd	2 x F_v,Rd	t_min
mm	mm²	kN	kN	kN	mm
12	84.3	60.7	28.7	57.3	4.6
16	157	113	62.8	126	6.9
20	245	176	98	196	8.5
24	353	254	141	282	10.2
30	561	404	224	449	12.7

Diameter of bolt	Minimum				Bearing resistance (kN)
Diameter of bolt	End distance	Edge distance	Pitch	Gauge	Bearing resistance (kN)
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	30.3	36.3	42.4	48.4	54.5	60.5	72.6	90.8	121	151	182
16	35	25	50	50	42.7	51.2	59.7	68.3	76.8	85.4	102	128	171	213	256
20	40	30	60	60	48.3	57.9	67.6	77.2	86.9	96.5	116	145	193	241	290
24	50	35	70	70	59.8	71.8	83.8	95.8	108	120	144	180	239	299	359
30	60	45	85	90	72.4	86.9	101	116	130	145	174	217	290	362	434

Diameter of bolt	Minimum				Bearing resistance (kN)
Diameter of bolt	End distance	Edge distance	Pitch	Gauge	Bearing resistance (kN)
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	40	25	50	45	53	63.7	74.3	84.9	95.5	106	127	159	212	265	318
16	50	30	65	55	69.6	83.6	97.5	111	125	139	167	209	279	348	418
20	60	35	80	70	85.5	103	120	137	154	171	205	256	342	427	513
24	75	40	95	80	108	130	152	174	195	217	260	325	434	542	651
30	90	50	115	100	128	154	179	205	231	256	308	385	513	641	769

For Class 8.8 and 10.9 M12 bolts the design shear resistance F_v,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 1.5f_u d t / γ_M2

Design Data

Long products

Flat products

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Other - Bolts Welds - Class 10.9 Hexagon head bolts - 1A. Bolt resistances - Non-preloaded-355