Select the lightest section for each of the situations described in the table. Assume that bolts are 3in on center. Do not consider block shear. Determine U from Table 3.2. TABLE 3.2 Shear Lag Factors for Connections to Tension MembersCaseDescription of ElementShear Lag Factor, U1U = 1.02All tension members where the tensionload is transmitted directly to each of thecross-sectional elements by fasteners orwelds (except as in Cases 4,5 and 6).All tension members, except plates andHSS, where the tension load is transmittedto some but not all of the cross-sectionalelements by fasteners or longitudinalwelds or by longitudinal welds incombination with transverse welds.(Alternatively, for W, M, S and HP, Case 7may be used. For angles, Case 8 may beused.)U=1-x/lU = 1.0andAll tension members where the tensionload is transmitted only by transversewelds to some but not all of thecross-sectional elements.A, area of the directlyconnected elementsPlates where the tension load istransmitted by longitudinal welds only.Iz2w... U-1.02w>11.5w... U-0.871.5w >1zw...U-0.75Round HSS with a single concentricgusset plate11.3D... U-1.0D=1<1.3D... U-17x = D/TRectangular HSSwith a single con-12 H... U=1-X/1centric gusset plateB²+2BH4(B+ H)with two side gussetplatesl=H… U-1-x4(B + H)W, M, S or HPShapes or Tees cutfrom these shapes.(If U is calculatedper Case 2, thelarger value is per-mitted to be used.)with flange con-nected with 3 ormore fasteners perline in the directionof loadingby2/3d... U=0.90by <2/3d... U=0.85U= 0.70with web connectedwith 4 or more fas-teners per line in thedirection of loadingwith 4 or more fas-teners per line in thedirection of loadingU=0.80Single and doubleangles (If U iscalculated perCase 2, the largervalue is permitted tobe used.)with 3 fastenersper line in thedirection of loading(With fewer than 3fasteners per line inthe direction ofloading, use Case 2.)U=0.60/-length of connection, in. (mm); w plate width, in. (mm);eccentricity of connection, in. (mm); B = overallwidth of rectangular HSS member, measured 90° to the plane of the connection, in. (mm); Hoverall height ofrectangular HSS member, measured in the plane of the connection, in. (mm)Source: AISC Specification, Table D3.1, p. 16.1-28, June 22, 2010. Copyright © American Instituteof Steel Construction. Reprinted with permission. All rights reserved.34578ExampleӨHHTD'я Prob.No.4-11PDPLLengthSection (kips) (kips) (ft)17526W12150SteelA36End ConnectionTwo lines of 7/8-in Ø bolts (2 ina line 4 in on center) each flangeAnswerW12 X 58 LRFDW12 x 65 ASD

Answered: Image /qna-images/answer/60f8330f-4dda-4723-9dc1-4e7242725bd6.jpg

Answered: Prob. No. 4-11 PD PL Length Section…

Prob. No. 4-11 PD PL Length Section (kips) (kips) (ft) 175 26 W12 150 Steel A36 End Connection Two lines of 7/8-in Ø bolts (2 in a line 4 in on center) each flange Answer W12 X 58 LRFD W12 x 65 ASD

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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