Laserfiche WebLink
SPECIFICATIONS (cont.) <br /> FIGURE 4.ALLOWABLE SHEAR(POUNDS PER FOOT)FOR HORIZONTAL LP PANEL DIAPHRAGMS WITH FRAMING OF DOUGLAS-FIR, <br /> LARCH OR SOUTHERN PINEIa)FOR WIND OR SEISMIC LOADING(b)(See also IBC Table 23061) <br /> Blocked Diaphragms Unblocked Diaphragms <br /> Minimum Nail Spacing(in.)at diaphragm boundaries Nails Spaced 6"max at <br /> Nominal Width (all cases),at continuous Panel edges Supported Edgesr") <br /> of Framing parallel To load(Cases 3&4), Case 1(No <br /> Minimum Performance Members at And at all panel Edges(Cases 5&6)0 unblocked <br /> Nail Category** Adjoining Panel 6 4 2-112(d) 2(e) edges or All other <br /> Penetration Edges and continuous Configurations <br /> Panel Common in Framing Boundaries i.) Nail Spacing(in.)at Other Panel Edges joints paral- (Case 2,3,4, <br /> Grade Nail Size (in.) (in.) (Cases 1,2,3&4)(0 lel to load) 5&6) <br /> LP 2 320 425 640 730 285 215 <br /> Structural1 100 1-1/2 15/32 3 360 480 720 820 320 240 <br /> Grades <br /> 7/16 2 255 340 505 575 230 170 <br /> 3 285 380 570 645 255 190 <br /> 8d(f) 1-3/8 <br /> 15/32 2 270 360 530 600 240 180 <br /> LP Rated 3 300 400 600 675 265 200 <br /> Sheathing 2 290 385 575 555 255 190 <br /> 15/32 3 325 430 650 735 290 215 <br /> 100 1-1/2 <br /> 2 320 425 640 730 285 215 <br /> 5/8 3 360 480 720 820 320 240 <br /> (a) For framing of other species:(1)Find specific gravity for species of lumber in the AFPA National Design Specification(2)Find shear value from table above for <br /> nail size for actual grade(3)Multiply value by the following adjustment factor:Specific Gravity Adjustment Factor=[1-(0.5—SG)],where SG=specific gravity of <br /> the framing.This adjustment shall not be greater than 1. <br /> (b) For shear loads of normal or permanent load duration as defined by the AF&PA NOS,the values in the table above should be multiplied by 0.63 or 0.56, <br /> respectively. <br /> (c) Space nails maximum 12 in.o.c.along intermediate framing members(6 in.o.c.when supports are spaced 48 in.o.c.or greater).Fasteners shall be located <br /> 3/8 in.from panel edges. <br /> (d) Framing at adjoining panel edges shall be 3 in.nominal or wider,and nails should be staggered where nails are spaced 2 in.o.c.or 2-1/2 in.o.c. <br /> (e) The minimum normal width of framing members not located at boundaries or adjoining panel edges should be 2 in. <br /> (f) 8d is recommended minimum for roofs due to negative pressures of high winds. <br /> (g) Framing at adjoining panel edges should be 3 in.nominal or wider,and nails should be staggered where 10d nails having penetration into framing of more than <br /> 1-1/2 in.are spaced 3 inches o.c. <br /> Note:Design for diaphragm stresses depends on direction of continuous panel joints with reference to load,not on direction of long dimension or strength axis of <br /> sheet.Continuous framing may be in either direction for blocked diaphragms. <br /> **Performance Category replaces the fractional nominal thickness used in P52. <br /> Case 1 Case CMS 3 Cosa 4 Casa Case 4 <br /> use r� ea FG A � rxnrdt t � aio is �4 w f d .h..�m.. <br /> Ina <br /> ter" <br /> (s t,,Mz s . 1` - s_, ` i -„ 1 w ,,, ,� >,/11.11•1110111111.11/11 <br /> �r lr�i,r�lii <br /> m. `w...I hr s 11 <br /> \UGomtoaewia)last —...�pruphrvgmoasaaur2 ::a ttnuscapan4Ostia - eortimmmet lohra <br /> (:)/iji ri <br /> ®2010 Louisiana-Pacific Corporation.LP is a registered trademark of Louisiana-Pacific Corporation.APA and Struc 1 are registered trademarks of APA-The Engineered Wood Association. <br /> Pyrotite is a registered trademark of Barrier Technology Corporation.All rights reserved.Printed in USA.Specifications subject to change without notice. <br />