28) Based on yielding only, the lightest equal leg 6x6 single angle that can resist a tensile axial load Pu 227 kips is the following: A) L6x 6x 7/8 B) L 6 x 6 x 3/4 C) L6x 6x 5/8 D) L6x6x 3/8 9) Which of the ASTM Designations given in Table 2-4 in the 15th edition of the AISCM is used for the designation of Round HSS shapes? A) A572 B) A913 C) A992 D) A500 30) An LRFD compression load Pu=36 kips is applied to an equal leg single angle. The effective lengt of the angle Le or (KL)-10 ft is the same in x direction and y direction Which of the following equa leg angles is the lightest weight equal leg angle that can resist Pu? A) L 8x8 x 1/2 B) L4x4 x 5/8 C) L6x 6x 7/16 D) L5x5 x 5/16

Designation Serial size 457x191 ■ Calculate the design tension resistance of the 457 × 191 × 67 UB. Given information from steel section table (assuming S275): Axis y-y cm³ 1296 67 Elastic modulus Wel Axis Z-Z cm³ 153 Mass per metre kg/m 67.1 Depth of section h mm 453.4 Width of section b mm 189.9 Plastic modulus Wpl Axis y-y cm³ 1471 Axis Z-Z cm³ 237 Thickness Thickness Root of web of flange radius tw tf mm r mm mm 8.5 12.7 Buckling parameter U 0.872 Torsional index X 37.9 10.2 Depth between fillets d mm 407.6 Ratios for local buckling Flange Web Cf/tf Cw/tw dm6 0.705 6.34 Warping Torsional constant lw constant IT cm4 37.1 48.0 Area of section cm² 85.5 Second moment of area Axis y-y cm4 29380 Axis Z-Z cm4 kNm 522 1452 Indicative values for S355 steel Mc.y.Rd Nb.z.Rd* for Lcr=3.5m kN 1600 Radius of gyration i Axis y-y cm 18.5 Axis Z-Z cm 4.12; Designation Serial size 67 457x191

As shown in the figure below, a C7 x 12.25 tension member of A572 Gr 50 steel is connected to the gusset plate using 20-mm diameter bolts. Using equation 3.1 to evaluate the value of U, calculate the allowable strength of the member. 38 mm 50 mm 50 mm 75 mm 75 mm ооо 38 mm t = 9.5 mm Pa C7 x 12.25

W 10x45 is connected to two plates with two lines of ¾” bolts as shown below. Determine the tensile strength of the system if Fy = 50 ksi and Fu = 65 ksi.

6 6a 6b 6c Alaterally supported beam was designed for flexure. The beam is safe for shear & deflection. The most economical section is W 6 x 20 however the said section is not readily available at the time of the construction. If you are the engineer in charge of the construction what alternative section will be the best replacement? Why? Use: Fy=248 MPa: E=200,000 MPa Designation W8 x 24 W8 x 21 Weight Ag (mm2) 3787 36 31 width mm kg/m d (depth) 30 157.48 152.91 9.27 W6 x 20 expla'n briefly your cho'ce. (transform your comparative analys's 'nto a narative form to support your cho'ce) W8 x 28 42 204.72 165.99 11.81 5323 4568 201.42 164.97 10.16 3974 210.31 133.86 flange bf thickness tf Web 10.16 thickness tw 6.60 Elastic Properties mm 4 Ix x 106 7.24 6.22 6.35 17 41 34 31 mm 3 Sxx 103 220 398 342 298 mm rx 67.56 87.63 86.87 88.65 mm 4 lyx 106 6 9 8 4 mm 3 Syx 106 72 109 92 61 mm ry 38.10244 41.15 40.89 32 Plastic properties. mm 3 Zx x 103 244 446 380 334 mm 3 Zyx 103 110 166 140 93…

A steel plate (called a cover plate) having cross-sectional dimensions W2 5.0 in. x 0.4 in. is welded along the full length of the bottom flange of a W, 12.0 in. x 87.0 in. wide-flange beam (see the figure, which shows the beam cross section). I W2 cover plate What is the percent increase in the smaller section modulus (as compared to the wide-flange beam alone)? Round your answer to two decimal places. % in smaller section modulus =

2.10 A square yellow-brass bar must not stretch more than 2.5 mm when it is subjected to a tensile load. Knowing that E = 105 GPa and that the allowable tensile strength is 180 MPa, determine (a) the maxi- mum allowable length of the bar, (b) the required dimensions of the cross section if the tensile load is 40 kN. 14 Ai Ei Q Search L ww * a hp

A PL3/8"X6" tension member is welded to a gusset plate as shown in the figure. The steel specification is ASTM A36. Assume that and compute the following: a) The design strength per LRFD b) The design strength per ASD PL ¾ x 6

choose letter of correct answer

Determine the type and amount of stress in each member of the truss shown below due to wind load using the method of joints. a.) Draw FBD b.) Solve the stress of all the members c.) Tabulate your answers (Length, Force, Compression/Tension, etc.)