Steel Designers Manual - TheBestFriend.org

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Steel Designers' Manual - 6th Edition (2003)
Bolt groups
Four rows of fasteners; fasteners not in the plane of the force
Bolt data 1265
Values of Z xx (cm 3 ) for
No. of fasteners Pitch, p diameter of bolt, D (mm)
in vertical row (mm) 12 16 20 22 24 27 30
2 70 53.2 99.2 155.0 191.8 223.7 291.1 356.3
3 102.1 190.2 296.9 367.3 428.1 557.0 681.2
4 166.7 310.5 484.7 599.5 698.6 908.7 1111.1
5 247.0 460.1 718.2 888.3 1035.0 1346.1 1645.7
6 343.1 639.1 997.4 1233.7 1437.4 1869.3 2285.2
7 454.9 847.3 1322.4 1635.6 1905.7 2478.2 3029.4
8 582.5 1084.9 1693.2 2094.1 2439.9 3172.8 3878.3
9 725.8 1351.8 2109.7 2609.2 3039.9 3953.1 4832.0
2 100 61.6 114.8 179.2 221.8 258.5 336.4 411.5
3 125.6 234.0 365.2 451.8 526.5 684.8 837.3
4 212.1 395.1 616.7 762.7 888.7 1155.8 1413.0
5 321.1 598.1 933.5 1154.5 1345.2 1749.3 2138.4
6 452.6 843.0 1315.6 1627.2 1895.8 2465.3 3013.5
7 606.6 1129.8 1763.1 2180.6 2540.6 3303.7 4038.2
8 783.1 1458.4 2276.0 2814.9 3279.5 4264.5 5212.5
9 982.0 1828.9 2854.2 3529.9 4112.6 5347.7 6536.4
Centre of rotation is assumed 60 mm below the bottom bolts
The tabulated values are conservative when the centre of rotation is located more than 60 mm below the
bottom bolts. The tabulated values are unconservative when the centre of rotation is located less than
60 mm below the bottom bolts.