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REVIEWED RESUB1 BLD2023-1075+LAG SCREW+10.18.2023_10.39.34_AM+3847447 4
Oct 18 2023 BLD2023-1075 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT OF TECHNICAL REPORT 12 FOR LAG SCREW CONNECTIONS REVIEWED BY CITY OF EDMONDS GENEP,AL DOWEL EQUATIONS FOR CALCULATING LATERAL CONNECTION VALUE TECHNICAL REPORT 1 A DESIGN AID No. IL 1, ASD/LRFD WITH COMMENTARY AND SUPPLEMENT: DESIGN VALUES FOR WOOD CONSTRUCTION American Forest & Paper Association �GT�IbES[ - , I American Forest & Paper Association DESIGN AID FOR APPPLICATION OF TECHNICAL REPORT 12 FOR LAG SCREW CONNECTIONS The American Wood Council (A WC) is part of the wood products group of the American Forest & Paper Association (AF&PA). AF&PA is the national trade association of the forest, paper and wood products industry, representing member companies engaged in growing, harvesting, and processing wood and wood fiber, manufacturing pulp, paper, and paperboard products form both virgin and recycled fiber, and producing engineered and traditional wood products. For more information see www.afandpa.org. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of- the-art, neither the American Forest & Paper Association nor its members assume any responsibility for any particular design prepared from this publication. Those using this document assume all liability from its use. Copyright © 2007 American Forest & Paper Association, Inc. American Wood Council 1111 191h St., NW, Suite 800 Washington, DC 20036 202-463-4713 awc info& afandp a. or g www.awc.org AMERICAN WOOD COUNCIL Introduction In the 2001 and 2005 National Design Specif cation® (NDS) for Wood Construction, calculation of reference lateral design values for lag screws and wood screws will typically require use of the fastener root diameter, Dr, unless a more detailed analysis is performed to account for the varying moment and bearing resistance of the fastener (NDS Section 11.3.2). This basis is intended to conservatively address calculation of reference lateral design values for full -body diameter lag screws and cut thread wood screws where the length of thread is often not known. One alternate method of accounting for the moment and bearing resistance of the threaded portion of the fastener and moment acting along the length of the fastener is provided in AF&PA's Technical Report 12 (TR12) - General Dowel Equations for Calculating Lateral Connection Values. A general set of equations enables use of different diameters for bearing and moment resistance associated with the unthreaded shank and threaded portion of the screw. Example calculations in this Design Aid are shown for lag screw connections; however, the design approach is also valid for wood screws. Example 1 addresses application of TR12 for three lag screw connections having identical side and main members but different screw geometry. Example 2 addresses calculation for the required length of unthreaded shank into the main member such that diameter, D, is applicable for calculation of reference lateral design values. Example 1. Application of TR12 to lag screw connections Problem Statement: Determine the reference design value for a single shear lag screw connection between sawn lumber members. Compare values for connection conditions described in Cases A, B, and C. Given: Lag screw diameter (NDS Appendix L): D = 0.375 in., Dr = 0.265 in. Wood parallel and perpendicular to grain dowel bearing strength (NDS Table 11.3.2): Fell = 5600 psi, Fel = 3650 psi Bending yield strength, Fyb (NDS Appendix I): Fyb = 45,000 psi Side member bearing length (equal to side member thickness, t): P, 1.5 in. Lag screw bearing length in the main member: lam = 3 in. Gap distance between side and main member: g=0in. Case A (See Table 1): Moment resistance and side and main member bearing are based on the unthreaded shank diameter. For this case, unthreaded shank diameter is equal to the fastener root diameter, Dr (e.g. Dshank = Dr) Side Member: qs = FesDr 3 M = FybD3 s 6 Main Member: qm = FemDr 3 M _ Fyb D r m 6 Assumptions in Case A are consistent with those used to tabulate reference design values in the NDS for reduced body diameter lag screws. The value of dowel bearing strength perpendicular to grain, Fel, is based on diameter, D. Although not used in this example, the slightly increased dowel bearing strength perpendicular to grain, Fel, associated with the smaller unthreaded shank diameter can be used in calculation of side member bearing resistance. AMERICAN FOREST & PAPER ASSOCIATION Case B (See Table 1): Moment resistance is based on fastener root diameter, Dr, and bearing resistance is based on D. Side Member: qs = FeSD 3 M = FybDr s 6 Main Member: qm = FemD 3 _ FybDr MM 6 Case C (See Table 1): Fastener moment resistance and bearing resistance are based on diameter, D (e.g. connection with unthreaded shank extending deep into the main member). Additional calculations will determine the length of unthreaded shank penetration into the main member (See Example 2 in this Design Aid). Side Member: qs = FeSD 3 M = FybD s 6 Main Member. qm = FemD 3 M = FybD m 6 Discussion Yield Limit Equations in NDS Table 11.3.1A utilize only a single diameter to account for moment and bearing resistance of the fastener. Calculated reference design values based on the root diameter will often be conservative relative to those calculated using TR12. For example, application of NDS Yield Limit Equations for both Case A and Case B using fastener root diameter results in a reference design value of 201 lbs for Z11. However, as shown in Table 1, the increased bearing area provided by the fully - threaded full body diameter lag screw increases the reference design value for Case B to 239 lbs. Table 1. Comparison of design values for reduced body and full body diameter lag screws with varving thread and shank location in connected members. Case A - Reduced body Case B - Full body Case C - Full body diameter diameter lag screw diameter lag screw lag screw (full body shank (reduced body shank (threads in shear plane) extends beyond shear plane) extends beyond shear plane) d L a� E m L Y � c 2 d(D J W d ID 0 fn H �2 M J 2 G=0.5 G=0.5 G=0.5 is em D Zll Zs1 Zm1 Z-L Z11 Zsl Zm1 Z-L Z11 Zs1 Zm1 Z-L in. in. in. Ibs Ibs Ibs Ibs Ibs Ibs Ibs Ibs Ibs Ibs Ibs Ibs Im 1113 890 580 580 1575 1260 821 821 1575 1260 821 821 IS 557 290 445 290 788 411 630 411 788 411 630 411 II 420 304 246 219 595 431 348 310 595 431 348 310 Illm 478 353 270 253 671 495 377 354 697 513 400 374 1-1/2 3 0.375 IIIs 260 153 191 143 357 207 262 194 406 249 297 232 IV 201 143 143 130 239 170 170 155 403 286 286 260 Reference Design Value,Z 201 143 143 130 239 170 170 155 403 249 286 232 AMERICAN WOOD COUNCIL Example 2. Full body diameter lag screws - calculation for length of unthreaded shank in main member Problem Statement: Using TR12, find the minimum length of unthreaded shank in the main member needed to develop the full diameter reference design value. Given: The 3/8" diameter full body diameter lag screw connection in Figure E2-1. Figure E2-1. Example of a 3/8" diameter full body diameter lag screw connection. 1/ P • D=3/8" (full -body ter lag screw) P Solution: Determine the induced moment along the length of the dowel. Find the minimum distance, x2, such that the induced moment in the dowel does not exceed the reduced moment capacity at the root, Mroot• Figure E2-2. Assumed dowel loading condition in the main member for Mode III,. } qm V ----MCI ----_"'max-- Xm Shear plane hear plane Induced moment varies along the length of the dowel in the main member from a maximum value equal to Mshank to a minimum value equal to zero. Dowel moment resistance at the shank, Mshank, and at the root, Mroot, are known. Reference design value, Z� based on full body diameter, D (See Appendix A Supplemental Table 11K): ZII = 530 lb. (Mode III,) Unadjusted yield mode value, P. P = ZII Rd (1) P = (530 1b)(3.2) = 16961b. Main member bearing resistance, qm: qm = FeIID (2) q,n = (5600psi) (0. 3 75 in) = 2100 pli Dowel moment resistance at shank, Mshank: 3 Mshank= FvbD = 395.5 in.-lbs (3) 6 Dowel moment resistance at root, M,.00t: 3 MYoot= FybDr = 139.6 in. -lb. (4) 6 The assumed dowel loading condition in the main member for Mode III, is shown in Figure E2-2. Zero shear and maximum moment in the main member occur at distance, xm, from the shear plane. Location of zero shear, x,,,,, in main member: P 1696 x. _ — _ = 0.808 in. (5) qm 2100 Maximum Moment, Mn,,,: M1. = Mshank = 395.5 in. -lb. For moment beyond xm, an alternate loading condition is constructed for the dowel where moment resistance is provided by wood bearing (see Figure E2-3). The minimum length of bearing, beyond xm, to develop the maximum moment is: o.s 2a = 2 M.M ) = 0.868 in. (6) qm AMERICAN FOREST & PAPER ASSOCIATION From Figure E2-3, distance x, ranges from 0 to 2a. At x, = 0, moment is equal to Max. At x, = 2a moment is equal to zero. Figure E2-3. Alternate loading condition for the dowel where moment resistance is provided by wood bearing. v MCI Sr ole Shear, Mmax Mreduced Moment, M IL Moment for the range 0 <_ x, <_ 2a can be calculated from Eq. 7 and Eq. 10 as follows: Moment for 0 < x1 _< a: 2 M = Mmax - q 2 1 (7) Moment for a<x1 < 2a: M = qM (2a — xJ2 (10) Expressed in standard quadratic form: x1-4ax,+4a2-2M =0 (IOA) qm Solving for xl, the distance from the point of maximum moment, Mmax, to reduced moment, M, is: o.s x, = 2a — 2M (I1) qm Distance X2 from the shear plane to reduced moment, M, is: 0.5 x2 = P + 2a — 2M (12) qm qm Minimum length, in terms of full body diameter, D, in main member: For M = 139.6 in.-lbs, which is equal to the dowel moment resistance at the root, Mroot: xi = 0.503 in. (from Eq. 8 or Eq. 11) For x, = 0.503 in., the location where induced moment in the dowel is equal to reduced moment at the root occurs in the range a < x, s 2a. The minimum unthreaded shank length in the main member, x2, such that induced moment does not exceed reduced moment at the root is determined from Eq. 12: x2 = 0.808+0.503 =1.311 in. or, shown as number of lag screw diameters: Solving for xl, the distance from the point of x2 = 3.5 lag screw diameters (i.e. calculated as maximum moment, Mmax to reduced moment, M, 1.311 in. / 0.375 in. = 3.496 lag screw is: diameters). 2(Mm. —M) 05 Tabulated values of x2, in number of fastener x, _ (8) diameters, are rounded up to the nearest 0.5 lag qm screw diameter. Distance x2 from the shear plane to reduced Total unthreaded shank length must also account for moment, M, is: side member thickness and, if applicable, washer thickness. For steel side plate equal to 1/4 in., total p 2(M. —M) 0.5 unthreaded shank length should not be less than x2 — -- qm qm AMERICAN WOOD COUNCIL Appendix A. Supplemental Tables 11J and 11 K: Lag Screws (full body diameter) In the 2001 and 2005 National Design Specification (NDS) for Wood Construction, tabulated design values for lag screws are calculated in accordance with Table 11.3.1A Yield Limit Equations and Table 11.3.1 B Reduction Terms based on the assumption that the lag screw root diameter, Dr, provides moment and bearing resistance. This calculation basis is intended to address connections where reduced body diameter lag screws (see NDS Appendix L) are used and accounts for the reduced moment capacity of fully -threaded lag screws. Reference design values for full body diameter lag screws based on diameter D are provided in Supplemental Table I U Lag Screws (full body diameter) for wood -to -wood connections and Supplemental Table 11K Lag Screws (full body diameter) for steel -to -wood connections. Supplemental Tables I I J and 11K Lag Screw (full body diameter) reference design values are comparable to values tabulated in the 1997 NDS and 1991 NDS based on use of full body diameter, D, in calculations. Each design value is followed by the minimum length of unthreaded shank in the main member, in terms of fastener diameter (See Table Al). For example, "210 (31))" represents a reference design value of 210 lb with minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter diameter, D, or 3 times 5/16 in. = 15/16 in. In some cases the required length of unthreaded The unthreaded shank length in the main member is depicted as dimension x2 in Figure Al. An example calculation for length of unthreaded shank in the main member is provided in Example 2 of this Design Aid. Figure Al. Typical full -body diameter lag screw connection. Full -body diameter rew _ P lhear plane P� Table Al. Example of supplemental table format. 3 �y ou G=0.49 fs Douglas Fir -Larch (1) ZII (x2) ZsL (x2) Z-L (x2) ZL (x2) is D in. in. lbs. lbs. lbs. lbs. 1/2 1/4 160 (3.5D) 110 (3.5D) 120 (4D) 110 (4D) 5/16 210 (3D) 120 (OD) 170 (4D) 120 (OD) shank in the main member is zero fastener diameters Reference design Minimum length of unthreaded full . . " D " This occurs where the design value s value diameter shank in the main member. (eO g ( ) )' i i g See dimension x2 in Figure Al. The not limited by the moment capacity of the fastener in value " 3D" indicates a minimum the main member such as Mode Is. length of shank equal to 3 times the lag screw diameter, D. AMERICAN FOREST & PAPER ASSOCIATION L. DESIGN AID No. 1 J Supplemental Table 11J LAG SCREWS (full body diameter): Reference Design Values (Z) for Single Shear (two member) Connections 1,2,3,4 for Sawn Lumber or SCL with both members of identical specific gravity E w a) 3 (D G=0.55 (D2 m G=0.67 Mixed Maple G=0.50 J) � o Red Oak Southern Pine Douglas Fir -Larch tg D ZI (xZ) ZSL N) Zml N) ZL N) ZI N) ZSL N) Zml N) ZL (xy) ZI N) ZSL N) Zml (xy) ZL N) in. in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. 1/2 1/4 190 (3D) 150 (3D) 150 (3D) 140 (3D) 170 (3.5D) 130 (313) 130 (3.5D) 120 (3.5D) 160 (3.5D) 110 (3.5D) 120 (4D) 110 (4D) 5/16 270 (2.51)) 190 (2.51)) 200 (3D) 190 (3D) 240 (3D) 140 (3D) 180 (3.5D) 140 (3.5D) 220 (31)) 130 (OD) 170 (4D) 130 (3.5D) 3/8 330 (2.51D) 210 (2.51D) 250 (31D) 210 (3D) 290 (2.5D) 160 (01D) 220 (3.5D) 160 (01D) 260 (31D) 140 (01D) 200 (3.5D) 140 (OD) 5/8 1/4 200 (31D) 150 (31D) 160 (3.5D) 150 (31D) 180 (3.5D) 130 (3.5D) 140 (3.5D) 130 (3.5D) 170 (3.5D) 120 (3.5D) 130 (41D) 120 (41D) 5/16 280 (31)) 210 (2.51)) 210 (3D) 200 (3D) 250 (3D) 180 (31)) 180 (3.51)) 170 (3.5D) 230 (31)) 160 (3D) 170 (4D) 160 (3.5D) 3/8 350 (2.5D) 250 (2.5D) 260 (3D) 230 (3D) 310 (2.5D) 200 (2.5D) 220 (3.5D) 200 (3D) 290 (3D) 170 (2.5D) 210 (3.5D) 170 (3.5D) 3/4 1/4 210 (3D) 160 (3D) 170 (3.5D) 160 (3.5D) 190 (3.5D) 140 (3.5D) 140 (4D) 130 (3.5D) 180 (3.5D) 130 (3.5D) 130 (4D) 120 (4D) 5/16 290 (3D) 210 (2.513) 220 (3D) 210 (3D) 260 (3D) 180 (3D) 190 (3.5D) 170 (3.5D) 240 (313) 170 (3D) 180 (4D) 160 (3.5D) 3/8 360 (2.5D) 250 (2.5D) 270 (3D) 240 (3D) 320 (2.5D) 220 (2.5D) 230 (3.5D) 200 (3D) 300 (3D) 200 (2.5D) 220 (3.5D) 190 (3.5D) 1 1/4 250 (3.5D) 190 (3.513) 200 (3.5D) 190 (3.5D) 210 (3.5D) 150 (3.5D) 160 (4D) 150 (4D) 200 (413) 140 (3.5D) 150 (4.5D) 130 (4D) 5/16 330 (31)) 240 (31)) 250 (3.5D) 230 (3D) 290 (3D) 200 (31)) 220 (41)) 190 (3.5D) 270 (3.5D) 180 (3D) 200 (4D) 170 (4D) 3/8 410 (2.51D) 280 (2.51D) 300 (31D) 260 (3D) 350 (3D) 230 (2.5D) 260 (3.5D) 220 (3.5D) 330 (31D) 210 (2.5D) 240 (4D) 200 (3.513) 1 1/4 1/4 260 (3.5D) 200 (3.5D) 200 (3.5D) 200 (3.5D) 230 (41D) 170 (3.5D) 180 (4.5D) 170 (41D) 220 (41D) 160 (3.5D) 170 (4.5D) 150 (4.5D) 5/16 370 (31)) 270 (31)) 280 (3.5D) 260 (3.5D) 320 (3.5D) 220 (31)) 240 (41)) 210 (3.5D) 300 (3.5D) 200 (3D) 220 (4.5D) 190 (4D) 3/8 460 (3D) 310 (2.5D) 340 (3.5D) 290 (3D) 390 (3D) 250 (2.5D) 290 (4D) 240 (3.5D) 360 (3D) 230 (3D) 270 (4D) 210 (3.5D) 1 1/2 1/4 260 (3.513) 200 (3.5D) 200 (3.5D) 200 (3.5D) 230 (4D) 180 (3.5D) 180 (4.5D) 170 (413) 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 5/16 370 (3D) 280 (313) 280 (3.5D) 270 (3.5D) 340 (3.5D) 240 (3.5D) 250 (4D) 230 (4D) 320 (3.5D) 220 (3.5D) 240 (4.5D) 200 (4D) 3/8 470 (3D) 340 (2.5D) 340 (3.5D) 320 (3D) 420 (3D) 280 (3D) 300 (4D) 260 (3.5D) 400 (3D) 250 (3D) 290 (4D) 230 (3.5D) 7/16 630 (2.5D) 400 (2.51D) 460 (3.5D) 380 (31D) 540 (31D) 330 (2.51D) 390 (41D) 310 (3.5D) 500 (31D) 300 (2.51D) 360 (41D) 280 (3.5D) 1/2 770 (2.5D) 480 (2.5D) 560 (3.5D) 440 (3D) 660 (3D) 400 (2.5D) 470 (41D) 360 (3.5D) 610 (3D) 370 (2.513) 430 (4D) 330 (3.5D) 5/8 1070 (2.5pL 66(a„ ,,760 (3.5D) 590 (3D) 9an rg rnrn ran 1-7 rrn 640 (4D) 500 (3.5D) 880 (3D) 520 (2.5D) 590 (4D) 460 (3.5ja) 3/4 1450 (2.51D) 890 (21D) 990 (3.5D) 780 (31D) 1270 (2.5D) 660 (2.5D) 850 (41D) 660 (3.5D) 1200 (2.51D) 590 (2.5D) 790 (41D) 590 (3.5D) 7/8 1890 (2.51D) 960 (21D) 1260 (3.5D) 960 (3D) 1680 (2.5D) 720 (01D) 1090 (41D) 720 (3.5D) 1590 (2.5D) 630 (01D) 1010 (4.5D) 630 (01D) 1 2410 (2.5D) 1020 (OD) 1560 (3.5D) 1020 (3.5D) 2150 (2.5D) 770 (OD) 1350 (413) 770 (OD) 2050 (2.5D) 680 (OD) 1270 (4.5D) 680 (OD) 1 3/4 1/4 260 (3.513) 200 (3.5D) 200 (3.5D) 200 (3.5D) 230 (4D) 180 (3.5D) 180 (4.5D) 170 (413) 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 5/16 370 (3D) 280 (313) 280 (3.5D) 270 (3.5D) 340 (3.5D) 250 (3.5D) 250 (4D) 230 (4D) 320 (3.5D) 240 (3.5D) 240 (4.5D) 220 (4.5D) 3/8 470 (3D) 340 (2.5D) 340 (3.5D) 320 (3D) 420 (3D) 300 (3D) 300 (4D) 280 (3.5D) 400 (3D) 270 (3D) 290 (4D) 250 (4D) 7/16 630 (2.5D) 440 (2.5D) 460 (3.5D) 410 (3D) 570 (3D) 360 (2.51D) 400 (413) 330 (3.5D) 550 (31D) 330 (2.51D) 380 (4D) 300 (3.5D) 1/2 830 (31D) 510 (2.51D) 590 (3.5D) 480 (3D) 720 (3D) 420 (2.5D) 510 (41D) 390 (3.5D) 670 (31D) 380 (2.513) 470 (4.5D) 350 (3.5D) 5/8 1160 (2.5D) 680 (2.5D) 820 (3.5D) 620 (3D) 1000 (3D) 580 (2.5D) 690 (4D) 520 3.5D) 930 (3D) 530 (2.5D) 630 (4.5D) 470 (3.51)) 1530 (2.51D) 900 (21D) 1050 (3.5D) 800 (31D) 3/4 1330 (2.51D) 770 (2.51D) 890 (41D) 680 (3.5D) 1250 (2.5D) 680 (2.51D) 830 (4.5D) 630 (3.513) 7/8 1970 (2.5D) 1120 (2D) 1320 (3.5D) 1020 (3D) 1730 (2.5D) 840 (2D) 1130 (4D) 840 (3.5D) 1640 (2.5D) 740 (OD) 1050 (4.5D) 740 (4D) 1 2480 (2.5D) 1190 (2D) 1620 (3.5D) 1190 (3.5D) 2200 (2.513) 890 (OD) 1390 (413) 890 (3.5D) 2080 (2.5D) 790 (OD) 1300 (4.5D) 790 (OD) 2 1/2 1/4 260 (3.513) 200 (3.5D) 200 (3.5D) 200 (3.5D) 230 (4D) 180 (3.5D) 180 (4.5D) 170 (413) 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 5/16 370 (3D) 280 (3D) 280 (3.5D) 270 (3.5D) 340 (3.5D) 250 (3.5D) 250 (4D) 230 (4D) 320 (3.5D) 240 (3.5D) 240 (4.5D) 220 (4.5D) 3/8 470 (3D) 340 (2.5D) 340 (3.5D) 320 (3D) 420 (3D) 300 (3D) 300 (4D) 280 (3.5D) 400 (3D) 290 (3D) 290 (4D) 260 (4D) 7/16 570 (31D) 400 (313) 400 (41D) 370 (3.5D) 550 (31D) 380 (31D) 380 (41D) 340 (41D) 630 (2.51D) 460 (2.51D) 460 (3.5D) 420 (3.5D) 1/2 830 (31D) 590 (2.51D) 590 (3.5D) 530 (3.5D) 750 (3D) 510 (3D) 520 (41D) 460 (41D) 720 (31D) 460 (31D) 490 (4.5D) 420 (41D) 5/8 1290 (2.5D) 800 (2.5D) 880 (4D) 730 (3.5D) 1170 (3D) 650 (2.5D) 780 (4.5D) 590 (3.5D) 1120 (3D) 590 (2.513) 730 (4.5D) 530 (4D) 3/4 1840 (2.5D) 1000 (2D) 1240 (4D) 900 (3.5D) 1570 (3D) 830 (2.5D) 1060 (4.5D) 740 (3.5D) 1460 (3D) 770 (2.5D) 980 (4.5D) 680 (4D) 7/8 2290 (2.5D) 1240 (2D) 1550 (4D) 1100 (3.5D) 1970 (2.5D) 1060 (2.5D) 1300 (4.5D) 920 (3.5D) 1840 (3D) 980 (2.5D) 1200 (4.5D) 850 (4D) 1 2800 (2.5D) 1520 (2D) 1860 (4D) 1320 (3.5D) 2430 (2.5D) 1280 (2D) 1570 (4.5D) 1120 (4D) 2280 (2.5D) 1130 (2.5D) 1450 (4.5D) 1040 (4D) 3 1/2 1/4 260 (3.513) 200 (3.5D) 200 (3.5D) 200 (3.5D) 230 (4D) 180 (3.5D) 180 (4.5D) 170 (4D) 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 5/16 370 (3D) 280 (313) 280 (3.5D) 270 (3.5D) 340 (3.5D) 250 (3.5D) 250 (4D) 230 (413) 320 (3.5D) 240 (3.5D) 240 (4.5D) 220 (4.5D) 3/8 470 (3D) 340 (2.51D) 340 (3.5D) 320 (31D) 420 (31D) 300 (3D) 300 (41D) 280 (3.5D) 400 (31D) 290 (31D) 290 (41D) 260 (41D) 7/16 630 (2.5D) 460 (2.51)) 460 (3.5D) 420 (3.5D) 570 (3D) 407MT 400 (41)) 370 (3.5D) 550 (31)) r0 (31D) 380 (41D) 340 (41D) 1/2 830 (31D) 590 (2.51D) 590 (3.5D) 530 (3.5D) 750 (3D) 520 (3D) 520 (41D) 460 (41D) 720 (31D) 490 (31D) 490 (4.5D) 430 (4D) 5/8 1290 (2.51D) 880 (2.51D) 880 (41D) 780(3.5 1170 (31D) 780 (2.5D) 780 (4.5D) 680 (4D) 1120ap) 700 (31D) 730 (4.5D) 630 (4.5D) 3/4 1860 (2.5D) 1190 (2.5D) 1240 (4D) 1080 (3.5D) 1690 (3D) 960 (2.5D) 1090 (4.5D) 850 (4D) 1610 (3D) 870 (2.5D) 1030 (5D) 780 (4D) 7/8 2540 (2.5D) 1410 (2.5D) 1640 (4D) 1260 (3.5D) 2300 (3D) 1160 (2.5D) 1450 (4.5D) 1020 (4D) 2190 (3D) 1060 (2.5D) 1360 (5D) 930 (4D) 1 13310 (2.5D) 1670 (2D) 2090 (4D) 1470 (3.5D) 2870 (3D) 1390 (2.5D) 1840 (513) 1210 (4D) 2660 (3D) 1290 (2.5D) 1700 (5D) 1110 (4D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; screw bending yield strengths (Fyb): Fyb= 70,000 psi for D = 1/4"; Fyb = 60,000 psi for D = 5/16"; Fyb = 45,000 psi for D > 3/8" 3. When 41D<_p<81D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (x2), is the minimum length of unthreaded full diameter shank in the main member. A value of (3D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN WOOD COUNCIL Supplemental Table 11J LAG SCREWS (full body diameter): Reference Design (Cont.) Values (Z) for Single Shear (two member) Connections1 ""' for Sawn Lumber or SCL with both members of identical specific gravity J I E 2 c 3 U W G=0.46 m cYi o m G=0.49 Douglas Fir(S) G=0.43 F -J 0 Douglas Fir -Larch (N) Hem-Fir(N) Hem -Fir t, D ZI (xz) Zsi N) Z- N) Zi N) ZI N) Zsl N) Z- N) Zl N) ZI N) Zsi N) Z- N) Zi N) in. in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. 1/2 1/4 160 (3.5D) 110 (3.5D) 120 (4D) 110 (4D) 150 (3.5D) 100 (3.5D) 110 (4D) 100 (4D) 150 (3.5D) 90 (3.5D) 110 (4.5D) 90 (4D) 5/16 210 (3D) 120 (OD) 170 (4D) 120 (OD) 200 (3D) 110 (OD) 160 (4D) 110 (OD) 190 (3.5D) 100 (OD) 150 (4D) 100 (OD) 3/8 260 (3D) 130 (OD) 200 (3.5D) 130 (OD) 240 (3D) 120 (OD) 190 (3.5D) 120 (OD) 230 (3D) 110 (OD) 180 (4D) 110 (OD) 5/8 1/4 160 (3.5D) 120 (3.5D) 120 (4D) 110 (4D) 160 (3.5D) 110 (3.5D) 120 (4D) 110 (4D) 150 (3.5D) 110 (3.5D) 110 (4.5D) 100 (4D) 5/16 230 (3D) 150 (313) 170 (4D) 150 (3.5D) 220 (3D) 140 (313) 160 (4D) 140 (4D) 210 (3.5D) 130 (3D) 160 (4D) 130 (4D) 3/8 290 (3D) 170 (2.513) 210 (3.5D) 170 (3.5D) 280 (313) 150 (OD) 200 (3.5D) 150 (3.5D) 270 (3D) 140 (OD) 190 (4D) 140 (3.5D) 3/4 1/4 170 (3.5D) 120 (3.5D) 130 (4D) 120 (4D) 170 (3.5D) 120 (3.5D) 130 (4.5D) 110 (4D) 160 (4D) 110 (3.5D) 120 (4.5D) 110 (4.5D) 5/16 240 (3D) 170 (313) 180 (4D) 160 (3.5D) 230 (3.5D) 160 (313) 170 (4D) 150 (4D) 220 (3.5D) 150 (3D) 160 (4.5D) 140 (4D) 3/8 300 (3D) 200 (2.5D) 210 (3.5D) 180 (3.5D) 290 (3D) 180 (2.5D) 200 (4D) 180 (3.5D) 270 (3D) 170 (3D) 190 (4D) 170 (3.5D) 1 114 200 (4D) 140 (3.5D) 150 (4.5D) 130 (4D) 190 (4D) 130 (3.5D) 140 (4.5D) 120 (4.5D) 180 (4D) 120 (3.5D) 130 (4.5D) 120 (4.5D) 5/16 260 (3.5D) 180 (313) 200 (4D) 170 (4D) 250 (3.5D) 170 (313) 190 (4.5D) 160 (4D) 240 (3.5D) 160 (3D) 180 (4.5D) 150 (413) 3/8 320 (3D) 210 (2.5D) 240 (4D) 190 (3.5D) 310 (3D) 200 (3D) 220 (4D) 180 (3.5D) 300 (3D) 190 (3D) 210 (4D) 170 (4D) 1 1/4 1/4 220 (413) 150 (4D) 170 (4.5D) 150 (4.5D) 210 (413) 140 (4D) 160 (5D) 140 (4.5D) 200 (4D) 130 (4D) 150 (5D) 130 (4.5D) 5/16 290 (3.5D) 190 (313) 220 (4.5D) 180 (4D) 280 (3.5D) 180 (3.513) 210 (4.5D) 170 (4D) 270 (3.5D) 170 (3.5D) 190 (4.5D) 160 (4.5D) 3/8 360 (3D) 230 (3D) 260 (4D) 210 (3.5D) 340 (3D) 210 (3D) 250 (4D) 200 (3.5D) 320 (3D) 200 (3D) 230 (4.5D) 180 (4D) 1 1/2 1/4 220 (413) 170 (4D) 170 (4.5D) 160 (4.5D) 210 (413) 160 (4D) 160 (5D) 150 (4.5D) 210 (4.5D) 150 (4D) 150 (5D) 140 (513) 5/16 320 (3.5D) 210 (3.5D) 230 (4.5D) 200 (4D) 310 (4D) 200 (3.5D) 220 (4.5D) 190 (4.5D) 290 (4D) 180 (3.5D) 210 (5D) 170 (4.5D) 3/8 400 (3.5D) 240 (3D) 280 (4D) 230 (4D) 380 (3.5D) 230 (3D) 270 (4.5D) 210 (4D) 360 (3.5D) 220 (3D) 260 (4.5D) 200 (4D) 7/16 500 (3D) 300 (2.5D) 360 (413) 270 (3.5D) 470 (3D) 280 (2.5D) 340 (4.5D) 260 (3.5D) 450 (3D) 260 (3D) 320 (4.5D)* 240 (4D) 1/2 610 (3D) 360 (2.5D) 420 (4D) 320 (3.5D) 580 (3D) 340 (2.5D) 400 (4.5D) 310 (4D) 550 (3D) 320 (2.5D) 380 (4.5D) 290 (4D) 5/8 870 (3D) 520 (2.5D) 590 (4D) 450 (3.5D) 830 (3D) 470 (2.5D) 560 (4.5D) 430 (4DJ 790 (3D) 420 (2.5D) 530 (4.5D) 410 (4D) 3/4 1190 (2.5D) 560 (OD) 780 (4.5D) 560 (4D) 1140 (3D) 520 (OD) 740 (4.5D) 520 (4D) 1100 (3D) 460 (OD) 700 (4.5D) 460 (4D) 7/8 1570 (2.5D) 600 (OD) 990 (4.5D) 600 (OD) 1520 (2.5D) 550 (OD) 950 (4.5D) 550 (OD) 1460 (3D) 500 (OD) 900 (5D) 500 (OD) 1 12030 (2.5D) 650 (OD) 1240 (4.5D) 650 (OD) 1930 (2.5D) 600 (OD) 1190 (4.5D) 600 (OD) 1800 (3D) 540 (OD) 1130 (5D) 540 (013) 1 3/4 1/4 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 210 (4D) 160 (4D) 160 (5D) 150 (4.5D) 210 (4.5D) 150 (4D) 150 (5D) 140 (513) 5/16 320 (3.5D) 230 (3.5D) 230 (4.5D) 220 (4.5D) 310 (4D) 220 (3.5D) 220 (4.513) 200 (4.5D) 300 (4D) 200 (3.5D) 210 (5D) 190 (4.5D) 3/8 400 (3.5D) 270 (3D) 280 (4D) 250 (4D) 390 (3.5D) 250 (3D) 270 (4.5D) 230 (4D) 370 (3.5D) 230 (3D) 260 (4.5D) 210 (4D) 7/16 540 (3D) 320 (2.5D) 380 (4.513) 290 (3.5D) 520 (3D) 300 (3D) 360 (4.513) 270 (4D) 490 (3.5D) 280 (3D) 340 (4.5D) 250 (4D) 1/2 660 (3D) 380 (2.5D) 460 (4.5D) 340 (4D) 620 (3D) 360 (2.5D) 440 (4.5D) 320 (4D) 590 (3D) 340 (2.5D) 410 (4.5D) 300 (4D) 5/8 IL 920 (3D) 530 (2.5D) 630 (4.5D) 470 (4D) 880 (3D) 500 (2.5D) 590 (4.5D) 440 (4D) 840 (3D) 480 (2.5D) 560 (4.5D) 410 (4D) 3/4 1240 (2.5D) 660 (2.5D) 810 (4.5D) 620 (4D) 1190 (3D) 600 (2.5D) 780 (4.5D) 590 (4D) 1130 (3D) 540 (2.5D) 730 (5D) 540 (4D) 7/8 1620 (2.5D) 700 (OD) 1030 (4.5D) 700 (4D) 1550 (2.5D) 640 (OD) 980 (4.5D) 640 (4D) 1490 (3D) 580 (OD) 930 (5D) 580 (4.5D) 1 2060 (2.5D) 750 (OD) 1280 (4.5D) 750 (OD) 1990 (2.5D) 700 (OD) 1220 (4.5D) 700 (OD) 1910 (3D) 630 (OD) 1160 (5D) 630 (OD) 2 1/2 1/4 220 (4D) 170 (4D) 170 (4.513) 160 (4.5D) 210 (4D) 160 (4D) 160 (5D) 150 (4.5D) 210 (4.5D) 150 (4D) 150 (5D) 140 (5D) 5/16 320 (3.5D) 230 (3.5D) 230 (4.5D) 220 (4.5D) 310 (4D) 220 (3.5D) 220 (4.5D) 210 (4.5D) 300 (4D) 210 (3.5D) 210 (5D) 200 (4.5D) 3/8 400 (3.5D) 280 (313) 280 (4D) 260 (4D) 390 (3.5D) 270 (313) 270 (4.5D) 250 (4D) 370 (3.5D) 260 (3D) 260 (4.5D) 230 (4.5D) 540 (3D) 380 (3D) 380 (4.513) 340 (4D) 530 (3.5D) 360 3D) 360 4.5D) 320 (4D) 510 (3.5D) 330 (3D) 340 (4.5D) 300 (4.5D) 7/16 1/2 710 (3D) 440 (3D) 480 (4.5D) 410 (4D) 690 (3.5D) 420 (3D) 460 (4.5D) 380 (4D) 660 (3.5D) 390 (3D) 440 (5D) 350 (4.5D) 1110 (3D) 580 (2.5D) 720 (4.5D) 520 (4D) 1050 (3D) 550 (2.5D) 690 (5D) 490 (4D) 1000 (3.5D) 510 (2.5D) 660 (5D) 450 (4.5D) 3/4 1440 (3D) 750 (2.5D) 960 (5D) 660 (4D) 1370 (3D) 720 (2.5D) 910 (5D) 630 (4D) 1300 (3D) 670 (2.5D) 840 (5D) 580 (4.5D) 7/8 1820 (3D) 960 (2.5D) 1180 (5D) 820 (4D) 1730 (3D) 920 (2.5D) 1110 (5D) 780 (4D) 1650 (3D) 830 (2.5D) 1040 (5D) 740 (4.5D) 1 2250 (3D) 1080 (2.5D) 1420 (5D) 1020 (4D) 2160 (3D) 1000 (2.5D) 1360 (5D) 980 (4D) 2060 (3D) 900 (2.5D) 1270 (5D) 900 (4.5D) 3 1/2 1/4 220 (4D) 170 (4D) 170 (4.5D) 160 (4.5D) 210 (4D) 160 (4D) 160 (5D) 150 (4.5D) 210 (4.5D) 150 (4D) 150 (5D) 140 (5D) 5/16 320 (3.5D) 230 (3.5D) 230 (4.5D) 220 (4.5D) 310 (413) 220 (3.513) 220 (4.5D) 210 (4.5D) 300 (413) 210 (3.513) 210 (5D) 200 (4.5D) 3/8 400 (3.5D) 280 (3D) 280 (4D) 260 (4D) 390 (3.5D) 270 (3D) 270 (4.5D) 250 (4D) 370 (3.5D) 260 (3D) 260 (4.5D) 230 (4.5D) 7/16 540 (3D) 380 (3D) 380 (4.5D) 340 (4D) 530 (3.5D) 360 (3D) 360 (4.5D) W 320 (4D) 510 (3.5D) 340 (3D) 340 (4.5D) 300 (4.5D) 1/2 710 (3D) 480 (3D) 480 (4.5D) 420 (4D) 690 (3.5D) 460 (3D) 460 (4.5D) 410 (4.5D) 660 (3.5D) 440 (3D) 440 (5D) 390 (4.5D) 5/8 1110 (3D) 690 (3D) 720 (4.5D) 620 (4.5D) 1070 (3.5D) 650 (3D) 690 (5D) 580 (4.5D) 1040 (3.5D) 600 (3D) 660 (5D) 530 (4.5D) 3/4 1600 (3D) 850 (2.5D) 1010 (5D) 750 (4D) 1540 (3D) 800 (2.5D) 970 (5D) 710 (4.5D) 1490 (3.5D) 740 (2.5D) 920 (5.5D) 650 (4.5D) 7/8 2170 (3D) 1040 (2.5D) 1340 (5D) 900 (4D) 2060 (3D) 980 (2.5D) 1270 (5.5D) 850 (4.5D) 1950 (313) 920 (2.513) 1160 (5.5D) 790 (4.5D) 1 1 2630 (3D) 1260 (2.5D) 1640 (5.5D) 1080 (4D) 2500 (3D) 1210 (2.5D) 1530 (5.5D) 1030 (4.5D) 2370 (3D) 1140 (2.5D) 1390 (5.5D) 970 (4.5D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; screw bending yield strengths (Fyb): Fyb= 70,000 psi for D = 1/4"; Fyb = 60,000 psi for D = 5/16"; Fyb = 45,000 psi for D > 3/8" 3. When 41D<p<81D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (xz), is the minimum length of unthreaded full diameter shank in the main member. A value of (31D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN FOREST & PAPER ASSOCIATION Supplemental Table 1 U LAG SCREWS (full body diameter): Reference Design (Cont.) Values (Z) for Single Shear (two member) Connections","' for Sawn Lumber or SCL with both members of identical specific gravity a G=0.36 N Eastern Softwoods gIDc W Spruce -Pine -Fir (S) m c m G=0.42 G=0.37 Western Cedars in � o Spruce -Pine -Fir Redwood (open grain) Western Woods 11� D ZI (x2) Zsi N) Zml N) Zi N) ZI N) Zsl (xz) Zml N) Zl (XZ) ZI N) Zsi N) Zml N) Zi N) in. in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. 1/2 1/4 150 (3.5D) 90 (3.5D) 110 (4.5D) 90 (4.5D) 130 (4D) 70 (OD) 100 (5D) 70 (OD) 130 (4D) 70 (OD) 100 (5D) 70 (OD) 5/16 180 (3.5D) 100 (OD) 150 (4.5D) 100 (OD) 160 (3.5D) 80 (OD) 130 (4.5D) 80 (OD) 160 (3.5D) 80 (OD) 130 (4.5D) 80 (OD) 3/8 220 (3D) 110 (OD) 180 (4D) 110 (OD) 190 (OD) 90 (OD) 160 (4.5D) 90 (OD) 190 (OD) 80 (OD) 150 (4.5D) 80 (OD) 5/8 1/4 150 (4D) 110 (3.5D) 110 (4.5D) 100 (4.5D) 140 (4D) 90 (4D) 100 (5D) 90 (4.5D) 140 (4D) 90 (4D) 100 (5D) 90 (5D) 5/16 210 (3.5D) 120 (3D) 150 (4.5D) 120 (4D) 200 (3.5D) 100 (OD) 140 (4.5D) 100 (4.5D) 200 (3.5D) 100 (OD) 140 (5D) 100 (OD) 3/8 260 (3D) 130 (OD) 190 (4D) 130 (4D) 240 (3D) 110 (OD) 170 (4.5D) 110 (OD) 240 (3D) 110 (OD) 170 (4.5D) 110 (OD) 3/4 1/4 160 (4D) 110 (3.5D) 120 (4.5D) 100 (4.5D) 140 (4D) 100 (4D) 110 (5D) 90 (4.5D) 140 (4D) 100 (4D) 100 (5D) 90 (5D) 5/16 220 (3.5D) 150 (3D) 160 (4.5D) 140 (4D) 200 (3.5D) 120 (3.5D) 140 (4.5D) 120 (4.5D) 200 (3.5D) 120 (3.5D) 140 (5D) 120 (4.5D) 3/8 1 270 (3D) 160 (3D) 190 (4D) 160 (4D) 250 (3D) 130 (OD) 170 (4.5D) 130 (4D) 250 (3D) 130 (OD) 170 (4.5D) 130 (4D) 1 1/4 170 (4D) 120 (3.5D) 130 (5D) 110 (4.5D) 160 (4D) 110 (4D) 120 (5D) 100 (5D) 160 (4D) 100 (4D) 110 (5.5D) 100 (5D) 5/16 240 (3.5D) 160 (3.5D) 170 (4.5D) 140 (4D) 220 (3.5D) 140 (3.5D) 160 (5D) 130 (4.5D) 210 (4D) 140 (3.5D) 150 (5D) 130 (4.5D) 3/8 290 (3D) 190 (3D) 210 (4D) 170 (4D) 270 (3.5D) 170 (3D) 190 (4.5D) 150 (4D) 260 (3.5D) 170 (3D) 180 (4.5D) 150 (4D) 1 1/4 1/4 200 (4D) 130 (4D) 150 (5D) 120 (4.5D) 180 (4.5D) 120 (4D) 130 (5.5D) 110 (5D) 170 (4.5D) 110 (4D) 120 (5.5D) 100 (5D) 5/16 260 (3.5D) 170 (3.5D) 190 (5D) 150 (4.5D) 240 (4D) 150 (3.5D) 170 (5D) 140 (4.5D) 230 (4D) 150 (3.5D) 170 (5.5D) 130 (4.5D) 3/8 320 (3.5D) 200 (3D) 230 (4.5D) 180 (4D) 290 (3.5D) 180 (3D) 210 (5D) 160 (4D) 290 (3.5D) 170 (3D) 200 (5D) 150 (4.5D) 1 1/2 1/4 200 (4.5D) 140 (4D) 150 (5D) 140 (5D) 190 (4.5D) 130 (4D) 140 (5.5D) 120 (5.5D) 190 (4.5D) 120 (4D) 130 (6D) 110 (5.5D) 5/16 290 (4D) 180 (3.5D) 210 (5D) 170 (4.5D) 260 (4D) 160 (3.5D) 180 (5.5D) 150 (5D) 260 (4D) 160 (3.5D) 180 (5.5D) 140 (5D) 3/8 350 (3.5D) 210 (3D) 250 (4.5D) 190 (4D) 320 (3.5D) 190 (3D) 230 (5D) 170 (4.5D) 310 (3.5D) 180 (3D) 220 (5D) 160 (4.5D) 7/16 440 (3D) 260 (3D) 310 (4.5D) 230 (4D) 400 (3.5D) 230 (3D) 280 (5D) 210 (4D) 400 (3.5D) IF230 (3D) 270 (5D) 200 (4.5D) 1/2 540 (3D) 320 (2.5D) 370 (4.5D) 280 (4D) 500 (3.5D) 290 (3D) 340 (5D) 250 (4.5D) 490 (3.5D) 280 (3D) 330 (5D) 250 (4.5D) 5/8 780 3D 410 51D) 520 (4. D 720 3D 350 (4.5D) D) 33n !nm asn I5n 330_L4.5D) 1080 (3D) 450 (OD) 690 (4.5D) 450 (4D) 3/4 1010 (3D) 370 (OD) 630 (5D) 370 (OD) 990 (3D) 360 (OD) 610 (5D) 360 (OD) 7/8 1440 (3D) 490 (OD) 890 (5D) 490 (OD) 1350 (3D) 410 (OD) 800 (5D) 410 (OD) 1330 (3D) 390 (OD) 780 (5.5D) 390 (OD) 1 1760 (3D) 530 (OD) 1120 (5D) 530 (OD) 1560 (3D) 440 (OD) 980 (5.5D) 440 (OD) 1520 (3D) 420 (OD) 950 (5.5D) 420 (OD) 1 3/4 1/4 200 (4.5D) 150 (4D) 150 (5D) 140 (5D) 190 (4.5D) 140 (4.5D) 140 (5.5D) 130 (5.5D) 190 (4.5D) 130 (4.5D) 140 (6D) 120 (5.5D) 5/16 300 (4D) 200 (3.5D) 210 (5D) 180 (4.5D) 280 (4D) 170 (3.5D) 200 (5.5D) 160 (5D) 270 (4D) 170 (3.5D) 190 (5.5D) 150 (5D) 3/8 370 (3.5D) 230 (3D) 260 (4.5D) 210 (4D) 350 (3.5D) 200 (3D) 240 (5D) 180 (4.5D) 340 (4D) 190 (3D) 230 (5.513) 170 (4.5D) 7/16 480 (3.5D) 270 (3D) 340 (5D) 250 (4D) 430 (3.5D) 240 (3D) 300 (5D) 220 (4.5D) 430 (3.5D) 240 (3D) 290 (5D) 210 (4.5D) 1/2 580 (3D) 330 (3D) 400 (5D) 290 (4D) 530 (3.5D) 300 (3D) 360 (5D) 260 (4.5D) 520 (3.5D) 290 (3D) 350 (5.5D) 250 (4.5D) 5/8 820 (3D) 470 (2.5D) 550 (5D) 410 (4D) 760 (3D) 400 (3D) 500 (5D) 370 (4.5D) 740 (3D) 380 (3D) 480 (5.5D) 360 (4.5D) 3/4 1120 (3D) 530 (2.5D) 720 (5D) 530 (4D) 1040 (3D) 430 (OD) 640 (5.5D) 430 (4.5D) 1020 (3D) 420 (OD) 620 (5.5D) 420 (4.5D) 7/8 1470 (3D) 570 (OD) 920 (5D) 570 (OD) 1370 (3D) 470 (OD) 810 (5.5D) 470 (OD) 1350 (3D) 460 (OD) 790 (5.5D) 460 (OD) 1 1890 (3D) 610 (OD) 1140 (5D) 610 (OD) 1760 (3D) 510 (OD) 990 (5.5D) 510 (OD) 1740 (3D) 490 (OD) 960 (5.5D) 490 (OD) 2 1/2 1/4 200 (4.5D) 150 (4D) 150 (5D) 140 (5D) 190 (4.5D) 140 (4.5D) 140 (5.5D) 130 (5.5D) 190 (4.5D) 140 (4.5D) 140 (6D) 130 (5.5D) 5/16 300 (4D) 210 (3.5D) 210 (5D) 190 (5D) 280 (4D) 200 (4D) 200 (5.5D) 180 (5D) 270 (4D) 190 (4D) 190 (5.5D) 170 (5.5D) 3/8 370 (3.5D) 260 (3.5D) 260 (4.5D) 230 (4.5D) 350 (3.5D) 240 (3.5D) 240 (5D) 210 (5D) 340 (4D) 230 (3.5D) 230 (5.5D) 200 (5D) 7/16 500 (3.5D) 3207?Tr 340 (5D) 300 (4.5D) 470 (3.5D) 290 (3D) 310 (Or560 (4.5D) 470 (3.5D) 280 (3D) 310 (5.5D) 250 (5D) 1/2 660 (3.5D) 380 (3D) 430 (5D) 340 (4.5D) 620 (3.5D) 330 (3D) 400 (5.5D) 300 (4.5D) 610 (3.5D) 320 (3D) 390 (5.5D) 290 (5D) 5/8 980 (3.5D) 510 (2.5D) 650 (5.5D) 450 (4.5D) 890 (3.5D) 460 (3D) 550 (5.5D) 400 (4.5D) 870 (3.5D) 440 (3D) 530 (6D) 380 (4.5D) 3/4 1280 (3D) 660 (2.5D) 820 (5D) 570 (4.5D) 1170 (3D) 600 (2.5D) 690 (5.5D) 510 (4.5D) 1150 (3.5D) 590 (2.5D) 670 (5.5D) 500 (4.5D) 7/8 1630 (3D) 810 (2.5D) 1020 (5D) 730 (4.5D) 1490 (3D) 680 (2.5D) 860 (5.5D) 660 (4.5D) 1470 (3D) 660 (2.5D) 840 (5.5D) 650 (5D) 1 2030 (3D) 880 (2.5D) 1240 (5D) 880 (4.5D) 1870 (3D) 730 (OD) 1040 (5.5D) 730 (5D) 1840 (3D) 700 (OD) 1010 (6D) 700 (5D) 3 1/2 1/4 200 (4.5D) 150 (4D) 150 (5D) 140 (5D) 190 (4.5D) 140 (4.5D) 140 (5.5D) 130 (5.5D) 190 (4.5D) 140 (4.5D) 140 (6D) 130 (5.5D) 5/16 300 (4D) 210 (3.5D) 210 (5D) 190 (5D) 280 (4D) 200 (4D) 200 (5.5D) 180 (5D) 270 (4D) 190 (4D) 190 (5.5D) 170 (5.5D) 3/8 370 (3.5D) 260 (3.5D) 260 (4.5D) 230 (4.5D) 350 (3.5D) 240 (3.5D) 240 (5D) 210 (5D) 340 (4D) 230 (3.5D) 230 (5.5D) 200 (5D) 7/16 500 (3.5D) 340 (313) 340 (5D) 300 (4.5D) 470 (3.5D) 310 (3.5D) 310 (5D) 270 (5D) 470 (3.5D) 310 (3.5D) 310 (5.5D) 270 (5D) 1/2 660 (3.5D) 430 (3D) 430 (5D) 380 (4.5D) 620 (3.5D) 400 (3.5D) 400 (5.5D) 350 (5D) 610 (3.5D) 390 (3.5D) 390 (5.5D) 340 (5D) 5/8 1020 (3.5D) 590 (3D) 650 (5.5D) 520 (4.5D) 960 (3.5D) 520 (3D) 610 (6D) 460 (5D) 950 (3.5D) 50n l3D1 .590 (6D) 4JQJ.�D) 3/4 1480 (3.5D) 730 (2.5D) 910 (5.5D) 640 (4.5D) 1390 (3.5D) 650 (3D) 800 (6D) 560 (5D) 1370 (3.5D) 630 (3D) 780 (6D) 550 (5D) 7/8 1920 (3.5D) 910 (2.5D) 1130 (5.5D) 780 (4.5D) 1740 (3.5D) 820 (2.5D) 970 (6D) 700 (5D) 1710 (3.5D) 800 (2.5D) 940 (6D) 680 (5D) 1 1 2330 (3D) 1120 (2.5D) 1360 (5.5D) 950 (4.5D) 2120 (3.5D) 1020 (2.5D) 1150 (6D) 850 (5D) 2080 (3.5D) 980 (2.5D) 1110 (6D) 830 (5D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; screw bending yield strengths (Fyb): Fyb= 70,000 psi for D = 1/4"; Fyb = 60,000 psi for D = 5/16"; Fyb = 45,000 psi for D > 3/8" 3. When 4D<_p<81D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (x2), is the minimum length of unthreaded full diameter shank in the main member. A value of (3D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN WOOD COUNCIL Supplemental Table 11J LAG SCREWS (full body diameter): Reference Design (Cont.) Values (Z) for Single Shear (two member) Connections1,2,3,4 for Sawn Lumber or SCL with both members of identical specific gravity J1 a N N N U U N rn G=0.35 US F- � p Northern Species is D ZI (X2) Zsl (X2) Zml (X2) ZL (X2) in. in. lbs. lbs. lbs. lbs. 1/2 1/4 120 (41D) 70 (01D) 100 (51D) 70 (OD) 5/16 150 (01D) 80 (01D) 120 (51)) 80 (OD) 3/8 180 (01D) 80 (01D) 150 (4.5D) 80 (OD) 5/8 1/4 130 (41D) 80 (41D) 100 (51D) 80 (51)) 5/16 190 (3.5D) 90 (01D) 140 (51)) 90 (OD) 3/8 230 (3.5D) 100 (01D) 160 (4.5D) 100 (OD) 3/4 1/4 140 (41D) 100 (41D) 100 (51D) 90 (5D) 5/16 200 (3.5D) 110 (3.51)) 140 (51)) 110 (4.5D) 3/8 240 (3.5D) 120 (0D) 170 (4.51D) 120 (4.513) 1 1/4 150 (4.5D) 100 (41D) 110 (5.51)) 90 (51)) 5/16 210 (41D) 140 (3.5D) 150 (51)) 120 (4.5D) 3/8 260 (3.51D) 160 (31D) 180 (51D) 140 (4.5D) 1 1/4 1/4 170 (4.5D) 110 (41D) 120 (5.5D) 100 (51D) 5/16 230 (41D) 140 (3.5D) 160 (5.51)) 130 (51)) 3/8 280 (3.51D) 170 (31D) 190 (51D) 150 (4.5D) 1 1/2 1/4 190 (4.5D) 120 (41D) 130 (61D) 110 (5.5D) 5/16 250 (41D) 150 (3.5D) 170 (5.51)) 140 (51)) 3/8 300 (3.5D) 180 (31D) 210 (51D) 160 (4.5D) 7/16 380 (3.5D) 220 (31D) 260 (51)) 200 (4.513) 1/2 480 (3.5D) 280 (31D) 320 (5D) 240 (4.5D) 518 700 (31D) 320 (OD) 450 (5D) 320 (4.5D) 3/4 970 (31D) 350 (OD) 590 (5.51D) 350 (OD) 7/8 1280 (31D) 370 (01D) 730 (5.51D) 370 (01D) 1 1 1460 (3D) 410 (01D) 920 (5.5D) 410 (OD) 1 3/4 1/4 190 (4.5D) 130 (4.5D) 130 (61D) 110 (5.51)) 5/16 270 (4.5D) 160 (41D) 180 (61)) 150 (51D) 3/8 330 (41D) 190 (31D) 230 (5.51)) 170 (4.5D) 7/16 410 (3.5D) 230 (31D) 280 (5.5D) 210 (4.5D) 1/2 510 (3.51D) 280 (31D) 340 (5.51D) 250 (4.5D) 5/8 730 (3.SD) 370 (31D) 460 (5.5D) 350 (4.513) 3/4 1000 (31D) 410 (01D) 600 (5.5D) 410 (4.5D) 7/8 1320 (31D) 430 (01D) 740 (5.5D) 430 (01D) 1 1700 (31D) 470 (01D) 920 (5.5D) 470 (01D) 2 1/2 1/4 190 (4.5D) 130 (4.5D) 130 (61D) 120 (5.51)) 5/16 270 (4.5D) 190 (41D) 190 (61D) 170 (5.5D) 3/8 340 (41D) 230 (3.51D) 230 (5.5D) 200 (51D) 7/16 460 (3.5D) 270 (31D) 300 (5.5D) 240 (55 1/2 600 (3.5D) 320 (3D) 390 (5.5D) 280 (5 5/8 850 (3.5D) 430 (3D) 510 (6D) 380 (5D 3/4 1120 (3.5D) 580 (31D) 650 (61D) 490 (51D) 7/8 1430 (31D) 610 (2.513) 790 (6D) 610 (5D) 1 1800 (3D) 680 (OD) 970 (6D) 680 (5D) 3 1/2 1/4 190 (4.5D) 130 (4.5D) 130 (6D) 120 (5.51)) 5/16 270 (4.5D) 190 (4D) 190 (6D) 170 (5.5D) 3/8 340 (4D) 230 (3.51)) 230 (5.51)) 200 (5D) 7/16 460 (3.5D) 300 (3.5D) 300 (5.51)) 260 (5D) 1/2 600 (3.5D) 380 (3.51D) 390 (5.5D) 330 (5D) 5/8 930 (3.51D) 490 (3D) 580 (6D) 430 (5D) 3/4 1330 (3.5D) 620 (3D) 750 (6D) 540 (5D) 7/8 1660 (3.51D) 770 (2.5D) 890 (6D) 650 (5D) 1 2030 (3.5D) 950 (2.51D) 1070 (6D) 810 (5D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix Q inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; screw bending yield strengths (FYb): FYb= 70,000 psi for D = 1/4"; FYb = 60,000 psi for D = 5/16"; FYb = 45,000 psi for D > 3/8" 3. When 4D<p<8D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (x2), is the minimum length of unthreaded full diameter shank in the main member. A value of (31D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN FOREST & PAPER ASSOCIATION Supplemental Table 11K LAG SCREWS (full body diameter): Reference Design Values (Z) for Single Shear (two member) Connections 1,2,3,4 with 1/4" ASTM A36 steel side plate, or ASTM A653, Grade 33 steel side plate (for is<1/4") U U � O O C J J (n E N N Y u- LL E Z Y a) fn N (q o O -o to o -O o o o f �6 L (A F- co,2 -J Q II 011� N II C7 x 0 2 Cn II 0 O 0 II O'er C7 0 Z II O N CD 0 2 is D ZII N) Zl N) ZII (X2) ZL N) ZII N) ZL N) ZII N) ZL (X2) ZII N) ZL N) in. in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. Ibs. lbs. 0.075 1/4 250 (3.5D) 190 (3.5D) 230 (4D) 170 (4D) 220 (4D) 160 (4.5D) 210 (4D) 150 (4.5D) 210 (4D) 150 (4.5D) (14 gage) 5/16 350 (3D) 260 (3.5D) 320 (3.5D) 230 (4D) 310 (3.5D) 210 (4D) 310 (3.5D) 210 (4.5D) 300 (3.5D) 200 (4.5D) 3/8 430 (2.51D) 310 (3D) 400 (3D) 270 (3.5D) 390 (3D) 250 (4D) 380 (3D) 250 (4D) 370 (3.5D) 240 (4D) 0.105 1/4 250 (3.5D) 190 (3.5D) 230 (4D) 170 (4D) 220 (4D) 160 (4.5D) 220 (4D) 160 (4.5D) 210 (4D) 150 (4.5D) (12 gage) 5/16 360 (3D) 260 (3.5D) 330 (3.5D) 230 (4D) 320 (3.5D) 220 (4.5D) 310 (3.5D) 220 (4.5D) 300 (4D) 210 (4.5D) 3/8 450 3D 310 31D 410 3D 280 3.5D 390 3D 260 4D 390 3D 260 4D 380 3.5D 250 4D 0.120 1/4 260 (3.5D) 200 (3.5D) 230 (4D) 170 (4D) 230 (4D) 160 (4.5D) 220 (4D) 160 (4.5D) 220 (4D) 150 (51D) (11 gage) 5/16 360 (3D) 270 (3.5D) 330 (3.5D) 230 (4D) 320 (3.5D) 220 (4.5D) 320 (3.5D) 220 (4.5D) 310 (4D) 210 (4.5D) 3/8 450 (3D) 320 (31D) 410 (3D) 280 (3.5D) 400 (3D) 260 (4D) 390 (3D) 260 (4D) 380 (3.5D) 250 (4D) 0.134 1/4 260 (3.5D) 200 (3.5D) 240 (4D) 180 (4D) 230 (4D) 170 (4.5D) 230 (4D) 170 (4.5D) 220 (4D) 160 (51D) (10 gage) 5/16 370 (3D) 270 (3.5D) 340 (3.5D) 240 (4D) 320 (3.5D) 220 (4.5D) 320 (3.5D) 220 (4.5D) 310 (4D) 210 (4.5D) 3/8 460 3D 320 31D 420 3D 280 3.5D 400 3D 270 4D 400 3.5D 260 4D 390 3.5D 250 4D 0.179 1/4 280 (3.5D) 220 (4D) 260 (4D) 190 (4.5D) 250 (4D) 180 (5D) 250 (4.5D) 180 (5D) 240 (4.5D) 170 (5D) (7 gage) 5/16 390 (31D) 290 (3.5D) 360 (3.5D) 250 (4D) 340 (4D) 240 (4.5D) 340 (4D) 240 (4.5D) 330 (4D) 230 (4.5D) 3/8 480 (3D) 340 (3.5D) 440 (3D) 300 (41D) 420 (3.5D) 280 (4D) 420 (3.5D) 280 (4D) 410 (3.5D) 270 (4.5D) 0.239 1/4 310 (4D) 240 (4D) 290 (4.5D) 220 (4.5D) 280 (4.5D) 200 (5D) 280 (4.5D) 200 (5D) 270 (4.5D) 190 (5.5D) (3 gage) 5/16 430 (3.5D) 310 (4D) 390 (4D) 280 (4.5D) 380 (4D) 260 (4.5D) 380 (4D) 260 (51D) 370 (4D) 250 (5D) 3/8 520 (3D) 370 (3.5D) 480 (3.5D) 330 (4D) 460 (3.5D) 310 (4.5D) 460 (3.5D) 310 (4.5D) 450 (3.5D) 290 (4.5D) 7/16 680 (3D) 460 (3.5D) 620 (3D) 410 (4D) 600 (3.5D) 390 (4D) 600 (3.5D) 380 (4.5D) 580 (3.5D) 370 (4.5D) 1/2 850 (3D) 570 (3.5D) 790 (3D) 500 (41D) 760 (3D) 470 (4.5D) 750 (3.5D) 460 (4.5D) 730 (3.5D) 450 (4.5D) 5/8 1280 (2.51D) 810 (3.5D) 1180 (31D) 710 (41D) 1130 (3D) 660 (4.5D) 1120 (3D) 660 (4.5D) 1090 (3.5D) 630 (4.5D) 3/4 1800 (2.5D) 1090 (3.5D) 1660 (3D) 950 (4D) 1590 (3D) 900 (4.5D) 1580 (3D) 880 (4.5D) 1530 (3D) 850 (5D) 7/8 2430 (2.51D) 1410 (3.5D) 2230 (3D) 1240 (4.5D) 2140 (3D) 1160 (4.5D) 2120 (3D) 1140 (4.5D) 2060 (3D) 1090 (5D) 1 3150 (2.5D) 1770 (4D) 2890 (3D) 1550 (4.5D) 2770 (3D) 1460 (4.5D) 2750 (3D) 1430 (5D) 2670 (3D) 1380 (51D) 1/4 1/4 350 (4D) 270 (4.5D) 320 (4.5D) 240 (5D) 310 (5D) 220 (5.5D) 300 (5D) 220 (5.5D) 290 (5D) 210 (5.51D) 5/16 480 (3.5D) 360 (4D) 450 (4D) 320 (4.5D) 430 (4.5D) 300 (5D) 430 (4.5D) 290 (5D) 410 (4.5D) 280 (5.5D) 3/8 590 (3D) 420 (3.5D) 550 (3.5D) 370 (4.5D) 530 (3.5D) 350 (4.5D) 520 (4D) 350 (4.5D) 510 (4D) 330 (5D) 7/16 750 (3D) 510 (3.5D) 690 (3.5D) 460 (4D) 670 (3.5D) 430 (4.5D) 660 (3.5D) 420 (4.5D) 640 (3.5D) 410 (5D) 1/2 930 (3D) 620 (3.5D) 860 (3D) 550 (41D) 830 (3.5D) 510 (4.5D) 820 (3.5D) 510 (4.5D) 800 (3.5D) 490 (5D) 5/8 1370 (3D) 860 (3.5D) 1260 (3D) 760 (4.5D) 1210 (3.5D) 710 (4.5D) 1200 (3.5D) 700 (4.5D) 1160 (3.5D) 670 (5D) 3/4 1900 (2.51D) 1140 (3.5D) 1740 (3D) 1000 (4.5D) 1670 (3D) 940 (4.5D) 1660 (3D) 930 (4.5D) 1610 (3.51D) 890 (5D) 7/8 2530 (2.51D) 1460 (41D) 2320 (3D) 1280 (4.5D) 2220 (3D) 1210 (4.5D) 2200 (3D) 1180 (5D) 2140 (3D) 1130 (5D) 1 13260 (2.5D) 1820 (4D)l 2980 (3D) 1590 (4.5D) 2860 (3D) 1500 (5D)l 2840 (3D) 1470 (5D)l 2750 (3D) 1420 (51D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; a dowel bearing strength (F e) of 61,850 psi for ASTM A653, Grade 33 steel and 87,000 psi for ASTM A36 steel and screw bending yield strengths (F Yb): Fyb = 70,000 psi for D = 1/4"; Fyb = 60,000 psi for D = 5/16"; Fyb = 45,000 psi for D > 3/8" 3. When 41D<_p<81D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (x2), is the minimum length of unthreaded full diameter shank in the main member. A value of (3D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN WOOD COUNCIL Supplemental Table 11 K LAG SCREWS (full body diameter): Reference Design (Cont.) Values (Z) for Single Shear (two member) Connections 1,2,3,4 with 1/4" ASTM A36 steel side plate, or ASTM A653, Grade 33 steel side plate (for is<1/4") N � -o N 0 L i N O N U C C O C O O U) 2 C N (n O V W O E V U 0 0 Cl) 3 C O -O N to M N U v O 7 N N U M L O U :O L (AH M JO II N C72 II Q U' (A II N CL U' d' y II U, Q>N N U' W fn?j-j II O U' Z is D ZI (X2) Zl (X2) ZI (X2) Zl (X2) ZI (X2) Zl (X2) ZI (X2) Zl (X2) ZI (X2) Zl (X2) in. in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. 0.075 1/4 200 (4D) 140 (5D) 200 (4.5D) 140 (5D) 190 (4.5D) 130 (5.5D) 190 (4.5D) 120 (5.5D) 180 (4.5D) 120 (5.5D) (14 gage) 5/16 290 (4D) 190 (4.5D) 290 (41)) 190 (5D) 270 (4D) 170 (5D) 270 (41)) 170 (5.5D) 260 (4.51)) 170 (5.51)) 3/8 360 (3.5D) 230 (4.51)) 360 (3.5D) 230 (4.5D) 340 (3.5D) 210 (5D) 330 (3.5D) 200 (51)) 330 (4D) 200 (5D) 0.105 1/4 210 (4.5D) 150 (5D) 210 (4.5D) 140 (5D) 190 (4.5D) 130 (5.5D) 190 (4.5D) 130 (5.5D) 190 (5D) 120 (6D) (12 gage) 5/16 300 (4D) 200 (5D) 290 (41)) 190 (5D) 280 (4D) 180 (5.5D) 270 (41)) 180 (5.5D) 270 (4.51)) 170 (5.51)) 3/8 370 (3.5D) 240 (4.51)) 360 (3.5D) 230 (4.5D) 340 (3.51)) 210 (5D) 340 (3.5D) 210 (51)) 330 (4D) 200 (5D) 0.120 1/4 210 (4.5D) 150 (5D) 210 (4.5D) 150 (5D) 200 (4.5D) 130 (5.5D) 200 (4.5D) 130 (6D) 190 (5D) 120 (6D) (11 gage) 5116 300 (41D) 200 (5D) 300 (4D) 200 (5D) 280 (4D) 180 (5.5D) 280 (4.51)) 180 (5.5D) 270 (4.51)) 170 (5.51)) 3/8 370 (3.5D) 240 (4.51)) 370 (3.5D) 230 (4.5D) 350 (3.51)) 210 (5D) 340 (4D) 210 (51)) 340 (4D) 210 (5D) 0.134 1/4 220 (4.5D) 150 (5D) 210 (4.5D) 150 (5D) 200 (4.5D) 140 (5.5D) 200 (5D) 130 (6D) 200 (5D) 130 (6D) (10 gage) 5116 300 (4D) 200 (5D) 300 (4D) 200 (5D) 280 (4D) 180 (5.5D) 280 (4.5D) 180 (5.5D) 280 (4.51)) 180 (5.51)) 3/8 380 (3.5D) 240 (4.5D) 370 (3.5D) 240 (4.5D) 350 (3.5D) 220 (5D) 350 (4D) 210 (51)) 340 (4D) 210 (5D) 0.179 1/4 230 (4.5D) 160 (5.5D) 230 (4.5D) 160 (5.5D) 220 (5D) 140 (6D) 220 (5D) 140 (6D) 210 (5D) 130 (6D) (7 gage) 5/16 320 (41)) 220 (51)) 320 (41D) 210 (51)) 300 (4.5D) 200 (5.5D) 300 (4.5D) 190 (5.5D) 290 (4.5D) 180 (6D) 3/8 400 (3.5D) 260 (4.51)) 390 (3.5D) 250 (4.5D) 370 (4D) 230 (5D) 370 (4D) 230 (5D) 360 (4D) 220 (5.51)) 0.239 1/4 260 (5D) 180 (5.5D) 260 (5D) 180 (6D) 250 (5.5D) 150 (6.5D) 240 (5.5D) 150 (6.5D) 240 (5.5D) 140 (6.5D) (3 gage) 5/16 350 (4.51)) 240 (5.5D) 350 (4.5D) 240 (5.51)) 330 (4.5D) 210 (61)) 330 (4.5D) 200 (6D) 320 (5D) 190 (6D) 3/8 440 (4D) 280 (51)) 430 (4D) 280 (5D) 410 (41)) 260 (5.5D) 410 (4D) 250 (5.5D) 400 (4D) 240 (5.5D) 7/16 560 (3.5D) 7350 (5D) 560 (3.5D) 340 (5D) 530 (4D) 320 (5.5D) 520 (41D) 310 (5.5D) 510 (41D) 300 (5.5D) 1/2 710 (3.5D) 430 (51)) 700 (3.5D) 420 (5D) 660 (41D) 390 (5.5D) 660 (4D) 380 (5.5D) 650 (4D) 370 (5.51)) 5/8 1060 (3.5D) 600 (5D) 1050 (3.5D) 600 (5D) 990 (3.5D) 550 (5.5D) 980 (3.5D) 520 (5.51)) 960 (4D) 500 (5.51)) 3/4 1490 (3.5D) 810 (5D) 1470 (3.5D) 800 (5D) 1390 (3.5D) 700 (5.5D) 1380 (3.5D) 680 (5.51D) 1350 (3.5D) 660 (6D) 7/8 1990 (3.51D) 1040 (5D) 1980 (3.5D) 1030 (5D) 1870 (3.5D) 880 (5.51)) 1850 (3.5D) 860 (61)) 1820 (3.5D) 800 (6D) 1 2580 (3.51)) 1310 (5.5D) 2560 (3.5D) 1290 (5.5D) 2420 (3.5D) 1080 (6D) 2390 (3.5D) 1040 (6D) 2350 (3.51)) 1000 (6D) 1/4 1/4 280 (5D) 200 (6D) 280 (5D) 190 (6D) 270 (5.5D) 170 (6.5D) 260 (5.5D) 160 (6.5D) 260 (5.51)) 160 (6.51D) 5/16 400 (4.5D) 260 (5.5D) 400 (4.5D) 260 (61)) 380 (51)) 220 (6.5D) 370 (51D) 220 (6.5D) 370 (51D) 210 (6.5D) 3/8 490 (4D) 320 (51D) 490 (4D) 310 (5.5D) 460 (4.51)) 280 (6D) 460 (4.5D) 270 (61)) 450 (4.5D) 260 (6D) 7116 620 (413) 380 (5D) 620 (41D) 390 (5D) 590 (4D) 340 (5.5D) 580 (41D) 330 (5.5D) 570 (41D) 320 (6D) 1/2 770 (3.5D) 470 (51)) 770 (3.5D) 460 (5D) 720 (41D) 410 (5.5D) 720 (4D) 390 (61D) 710 (4D) 380 (61D) 5/8 1130 (3.5D) 640 (51D) 1120 (3.5D) 630 (5D) 1060 (41D) 560 (5.5D) 1050 (4D) 540 (61D) 1030 (4D) 520 (61D) 3/4 1560 (3.51D) 850 (51D) 1550 (3.5D) 840 (5D) 1460 (3.51D) 710 (6D) 1450 (3.5D) 690 (6D) 1420 (4D) 670 (61D) 7/8 2070 (3.5D) 1080 (5.51)) 2050 (3.5D) 1070 (5.5D) 1940 (3.51)) 900 (6D) 1920 (3.5D) 870 (61)) 1890 (3.5D) 820 (6D) 1 2670 (3.5D) 1340 (5.5D) 2640 (3.5D) 1310 (5.5D) 2490 (3.5D) 1090 (6D) 2470 (3.5D) 1060 (6D) 2420 (3.5D) 1020 (6D) 1. Tabulated lateral design values (Z) shall be multiplied by all applicable adjustment factors (see NDS Table 10.3.1). 2. Tabulated lateral design values (Z) are for "full body diameter" lag screws (see NDS Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; minimum screw penetration, p, into the main member equal to 8D; a dowel bearing strength (F e) of 61,850 psi for ASTM A653, Grade 33 steel and 87,000 psi for ASTM A36 steel and screw bending yield strengths (F yb): Fyb = 70,000 psi for D = 1/4"; Fyb = 60,000 psi for D = 5/16"; Fyb = 45,000 psi for D > 3/8" 3. When 41)<_p<8D, tabulated lateral design values (Z) shall be multiplied by p/8D. 4. The term, (x2), is the minimum length of unthreaded full diameter shank in the main member. A value of (3D) represents a minimum length of unthreaded shank in the main member equal to 3 times the lag screw diameter, D. AMERICAN FOREST & PAPER ASSOCIATION American Forest & Paper Association A F & P A'' American Wood Council 111119th Street, NW Suite 800 Washington, DC 20036 Phone: 202-463-4713 Fax: 202-463-2791 M— awcinfo@afandpa.org u, www.awc.org