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TABLE 3—SHEAR (BEARING) CAPACITY OF SCREW CONNECTIONS, pounds-force1,2,3,4,5
<br />SCREW SCREW HEAD
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<br />1 #10-16 PPH 289 289 404 - - - -
<br />2A, 2B #10-16 HWH 369 395 453 - - - -
<br />3 #10-24 PWH 32210 57110 5347,8,9 - - - -
<br />4, 5 #12-14 HWH 356 573 513 497 - - -
<br />6 #12-14 PUFH 32510 60910 4817,8,9 6247,8 - - -
<br />7 #12-24 HWH 29110 61010 4767,8,9 6477,8 6307,8,9 7347,8,9 6007,8,9
<br />8 1/4-14 HWH 377 626 520 661 638 - -
<br />9, 10 1/4-20 HWH 3867,8 5267,8 5338 6708 5959 6249 5549
<br />11 5/16-18 HWH 408 622 561 891 - - -
<br />12A, 12B 5/16-24 HWH - - - - 1347 - 887
<br />1 #10-16 PPH 433 433 605 - - - -
<br />2A, 2B #10-16 HWH 590 631 724 - - - -
<br />3 #10-24 PWH 51510 85410 9137,8,9 - - - -
<br />4, 5 #12-14 HWH 569 917 820 795 - - -
<br />6 #12-14 PUFH 52010 97510 7707,8,9 9997,8 - - -
<br />7 #12-24 HWH 46610 97610 7617,8,9 10357,8 10097,8,9 11747,8,9 9607,8,9
<br />8 1/4-14 HWH 603 1001 833 1058 1021 - -
<br />9, 10 1/4-20 HWH 6177,8 8427,8 8528 10728 9529 9999 8869
<br />11 5/16-18 HWH 653 996 897 1425 - - -
<br />12A, 12B 5/16-24 HWH - - - - 2155 - 1419
<br />For SI: 1 inch = 25.4 mm, 1 lbf = 4.4 N, 1 ksi = 6.89 Mpa.
<br />1Available strengths are based on laboratory tests, with safety factors/resistance factors calculated in accordance with AISI S100.
<br />2For shear connections, the lower of the available screw shear strength and the available shear (bearing) capacity must be used for design.
<br />3Values are based on steel members with a minimum yield strength of Fy = 33 ksi and a minimum tensile strength of Fu = 45 ksi.
<br />4Available capacity for other member thickness may be determined by interpolating within the table.
<br />5Unless otherwise noted, when both steel sheets have a minimum specified tensile strength Fu ≥ 58 ksi, multiply tabulated values by 1.29 and when both steel sheets
<br />have a minimum tensile strength Fu ≥ 65 ksi steel, multiply tabulated values by 1.44.
<br />6The first number is the thickness of the steel sheet in in contact with the screw head (top sheet). The second number is the thickness of the steel sheet not in contact
<br />with the screw head (bottom sheet).
<br />7When both steel sheets have a minimum specified tensile strength of Fu ≥ 55 ksi (e.g. ASTM A653 SS Grade 40), multiply tabulated values by 1.22.
<br />8When both steel sheets have a minimum specified tensile strength of Fu ≥ 52 ksi (e.g. ASTM A653 SS Grade 37), multiply tabulated values by 1.15.
<br />9When both steel sheets have a minimum specified tensile strength of Fu ≥ 58 ksi (e.g. ASTM A36), multiply tabulated values by 1.29.
<br />10Increasing values for higher steel tensile strength per Note 5 is not allowed.
<br />11Head styles: HWH = Hex Washer Head; PPH = Phillips Pan Head; PWH = Phillips Wafer Head; PUFH = Phillips Undercut Flat Head.
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