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ESR-3699 Page 13 of 18 <br /> <br /> <br />TABLE 3—SHEAR STRENGTH DESIGN INFORMATION FOR TAPCON+ SCREW ANCHORS <br /> AND SAMMYS THREADED ROD ANCHORS1 <br />CHARACTERISTIC SYMBOL UNITS <br />NOMINAL ANCHOR DIAMETER (inch) <br />1/4 1/4 3/8 1/2 <br />Head Style — — <br />SAMMYS for <br />Vertical Rod <br />(CCST 516) <br />SAMMYS for <br />Horizontal Rod <br />(SW-CCST 516) <br />Hex Head Hex <br />Head <br />Hex <br />Head <br />Drill bit specification in. <br />1/4 <br />Tapcon+ <br /> Bit <br />1/4 <br />Tapcon+ <br />Bit <br />1/4 <br />ANSI <br />Bit <br />3/8 <br />ANSI <br />Bit <br />1/2 <br />ANSI <br />Bit <br />Anchor category 1, 2 or 3 — 1 1 2 1 1 <br />Minimum effective <br />embedment depth hef in. 1.454 1.45 1.78 1.32 2.17 3.02 <br />Minimum concrete member <br />thickness hmin in. 4 4 4 4 6 <br />Critical edge distance cac in. 21/2 21/2 41/2 3 4 5 <br />Data for Steel Strengths in Shear <br />Minimum specified yield <br />strength fy psi Not applicable 100,000 100,000 100,000 <br />Minimum specified ultimate <br />strength futa psi Not applicable 125,000 125,000 125,000 <br />Effective shear stress area Ase in2 Not applicable 0.047 0.098 0.185 <br />Steel strength in shear - static Vsa lbf 9055 2,045 3,621 12,610 <br />Steel strength in shear - <br />seismic Vsa,eq Not applicable3 1,350 2,920 9,300 <br />Strength reduction factor  for <br />shear, steel failure modes2 sa — 0.60 0.60 0.60 0.60 <br />Data for Concrete Breakout and Concrete Pryout Strengths in Shear <br />Nominal Outside diameter <br />(shank) da in. 0.25 0.25 0.38 0.50 <br />Load bearing length of anchor ℓe — 1.67 1.45 1.78 1.32 2.17 3.02 <br />Coefficient for Pryout Strength  cp — 1.0 1.0 1.0 1.0 2.0 <br />Strength reduction factor for <br />shear, concrete breakout2 cb — 0.70 0.70 0.70 0.70 <br />Strength reduction factor for <br />shear, pryout2 cp — 0.70 0.70 0.70 0.70 <br />For SI: 1 inch = 25.4 mm, 1 ft-lbf = 1.356 N-m. <br />1The data presented in this table is to be used in conjunction with the design criteria of ACI 318 -14 Chapter 17 or ACI 318-11 Appendix D, as <br />applicable. <br />2The strength reduction factor applies when the load combinations from the IBC or ACI 318 are used and the requirements of ACI 318-19 17.5.3, <br />ACI 318-14 17.3.3 or ACI 318-11 D.4.3, as applicable, are met. If the load combinations of ACI 318-11 Appendix C are used, the appropriate <br />strength reduction factor must be determined in accordance with ACI 318-11 D.4.4. <br />3The SAMMYS anchors have not been evaluated for seismic shear design under this report. <br />4For calculation only. For actual hef see Table 1. <br />5For the strength between the threaded cap and anchor head. <br /> <br /> <br /> <br />