Tables - Bolt Data

Steel Designers Manual (6th Edition) - Bolt data Discuss me ...

1236

Bolt data

Bolt data Hole sizes

Nominal diameter (mm)

– for ordinary bolts and friction grip connections Clearance ho l e diameterb (mm)

M12a M 16 M 20 M 22 M 24 M 27 M 30 t n e m e e r g A e c n e c i L z i b l e e t S e h t f o s n o i t i d n o c d n a s m r e t e h t o t t c e j b u s s i t n e m u c o d s i h t f o e s U . d e v r e s e r s t h g i r l l a 9 0 t 0 h 2 g i h r y c r p a o c M s i 2 l 0 a i n r o e t d a e m t a s i e r h C T

Oversize hole diametera (mm)

14 18 22 24 26 30 33

Short slotted holesa (mm)

Long slotted holesa (mm)

Narrow dimension

S l ot dimension

Narrow dimension

Maximum dimension

14 18 22 24 26 30 33

18 22 26 28 32 37 40

14 18 22 24 26 30 33

30 40 50 55 60 67 75

17 21 25 27 30 35 38

a

Hardened washers to be used In cases where there are more than three plies in joint the holes in the inner plies should be one millimetre larger than those in the outer plies b

Bolt strengths Bolt grade

Shear strength, p s (N/mm2) 2 Bearing strength, p bb bb (N/mm ) Tension strength, p t (N/mm2) a

Steel grade

4.6

8. 8

S 275

S 35 5

S460

160 460 240

375 1000a 560

46 0

550

670

The bearing value of the connected part is critical


Bolt data

1237

Spacing, end and edge distances – minimum values (see Fig. 23.1) Nominal diameter of fastener (mm)

M12 M16 M20 M22a M24 M27a M30 a

t n e m e e r g A e c n e c i L z i b l e e t S e h t f o s n o i t i d n o c d n a s m r e t e h t o t t c e j b u s s i t n e m u c o d s i h t f o e s U . d e v r e s e r s t h g i r l l a 9 0 t 0 h 2 g i h r y c r p a o c M s i 2 l 0 a i n r o e t d a e m t a s i e r h C T

Diameter of clearance hole (mm)

Minimum spacing (mm)

Edge distance to rolled, sawn, planed, or machine flame cut edge (mm)

Edge distance to sheared edge or hand flame cut edge and end distance (mm)

14 18 22 24 26 30 33

30 40 50 55 60 68 75

18 23 28 30 33 38 42

20 26 31 34 37 42 47

Non-preferred size

Maximum centres of fasteners Thickness of element (mm) 5 6 7 8 9 10 11 12 13 14 15

Spacing in the direction of stress (mm)

Spacing in any direction in corrosive environments (mm)

70 84 98 112 126 140 154 168 182 196 210

80 96 112 128 144 160 176 192 200 200 200


1238

Bolt data

Maximum edge distances (1)


11t e a

275 265 255 245 235

1.0 1.02 1.04 1.06 1.08

11t 11.21t 11.44t 11.65t 11.90t

16 40 63 80 100

355 345 335 325 315

0.88 0.89 0.91 0.92 0.93

9.68t 9.79t 10.0t 10.12t 10.28t

16 40 63 80 100

460 440 430 410 400

0.77 0.79 0.80 0.82 0.83

8.47t 8.69t 8.80t 9.02t 9.13t

p y (N/mm2)

S275

16 40 63 80 100

S355

S460

a

12

275 = Ê ˆ Ë p y ¯

Thickness less than or equal to (mm)

BS 4360 grade

e

This rule does not apply to fasteners interconnecting the components of back-to-back tension members This table is expanded in the next table (Maximum edge distances (2))


Bolt data

1239

Maximum edge distances (2) Thickness of element t (mm)


Corrosive environment 40 mm + 4t (mm)

Steel grade S275 e = 11t e (mm)



5 6 7 8 9 10 11 12 13 14 15 16

60a 64a 68a 72a 76 80 84 88 92 96 100 104

55a 66 77 88 99 110 121 132 143 154 165 176

48a 58a 67a 77 87 96 106 116 125 135 145 154

42a 51a 59 68a 76 85 93 102 110 119 127 136

20 25

120 140

224 280

196 245

174 217

30 35

160 180

336 392

294 343

261 304

40 45

200 220

448 515

392 445

347 396

50 55 60

240 260 280

572 629 686

501 551 601

440 484 528

65 70 75

300 320 340

757 816 874

657 708 759

586 631 677

a

Use the lesser values for the appropriate grade of steel


1240

Bolt data

Back marks in channel flanges RSC

Nominal flange width (mm)

Back mark (mm)

Edge dist. (mm)

Recommended diameter (mm)

102 89 76 64 51 38

55 55 45 35 30 22

47 34 31 29 21 –

24 20 20 16 10 –

Back marks in angles t n e m e e r g A e c n e c i L z i b l e e t S e h t f o s n o i t i d n o c d n a s m r e t e h t o t t c e j b u s s i t n e m u c o d s i h t f o e s U . d e v r e s e r s t h g i r l l a 9 0 t 0 h 2 g i h r y c r p a o c M s i 2 l 0 a i n r o e t d a e m t a s i e r h C T

Nominal leg (mm) 250 200 150 125 120 100 90 80

S 1 (mm)

S 2 (mm)

75 55 45 45

(30) (20) (20) (16)

S 3 (mm)

75 55 50 50

(30) (20) (20) (16)

S 4 (mm)

S 5 (mm)

S 6 (mm)

55 (20)

55 (20)

55 (20)

55 (24) 50 (24) 45 (20)

Nominal leg (mm) 75 70 65 60 50 45 40 30 25

S 1 (mm) 45 40 35 35 28 25 23 20 15

(20) (20) (20) (16) (12)

Maximum recommended bolt sizes are given in brackets This table is reproduced from BCSA Publication No. 5/79, Metric Practice for Structural Steelworks, 3rd edn, 1979.


Bolt data

1241

Cross centres through flanges Flange width (mm)

Joists 44 64 76 89 102 114 127 152 203 t n e m e e r g A e c n e c i L z i b l e e t S e h t f o s n o i t i d n o c d n a s m r e t e h t o t t c e j b u s s i t n e m u c o d s i h t f o e s U . d e v r e s e r s t h g i r l l a 9 0 t 0 h 2 g i h r y c r p a o c M s i 2 l 0 a i n r o e t d a e m t a s i e r h C T

Minimum for accessibility (mm)

Maximum for edge dist. (mm)

S 1 (mm)

S 2 (mm)

S 3 (mm)

S 4 (mm)

27 38 48 54 60 66 72 75 91

(5) (10) (10) (12) (16) (16) (20) (20) (24)

30 39 51 59 62 74 77 102 143

30 40 48 56 60 70 75 90 140

UCs 152 203 254 305 368 406

65 75 87 100 88 120

(24) (24) (24) (24) (24) (24)

92 143 194 245 308 346

90 140 140 140 140 140

120 (24) 140 (24) 140 (24)

60 (24) 75 (24) 75 (24)

240 (24) 290 (24) 290 (24)

UBs 102 127 133 140 146 152 165 171 178 191 210 229 254 267 292 305 419

50 62 57 69 64 73 67 72 72 74 80 80 87 91 94 100 112

(16) (20) (20) (24) (24) (24) (24) (24) (24) (24) (24) (24) (24) (24) (24) (24) (24)

62 77 83 80 86 92 105 111 118 131 150 169 194 207 232 245 359

54 70 70 70 70 90 90 90 90 90 140 140 140 140 140 140 140

90 (20) 100 (24) 120 (24) 140 (24)

50 60 60 75

190 220 240 290

(20) (24) (24) (24)

(20) (24) (24) (24)

Maximum bolt diameters for dimensions shown are given in brackets

Tables - Bolt Data

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