A W12 x 79 of A572 Grade 60 steel is used as a compression member. It is 28 feet long, pinned at each end, and has additional support in the weak direction at a point 12 feet from the top. Can this member resist a service dead load of 180 kips and a service live load of 320 kips? a. Use LRFD. b. Use ASD.
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- Select all zero-force members in the truss shown below. Check the box for zero- force members 3 m 3 m 12 m, 8 @ 1.5 m DE O LK ЕР O HF O BC BM EF OM CD BN LO O DK FI O coQuestion 1 Check that the medium-term load of 38 kN applied to the spaced column shown in below complies with the design requirements of BS 5268-2. The column consists of two 38 x 150 C22 timbers 76 mm apart. All joints are glued and intermediate packs are 250 mm long. suitable connection #### x ->89² 6:38. Y T -end blocking AP 100 intermediate blocking L₂ 1₁ x W L W EFH 400 m 38kN medium term load -ICHICHID -200 600 600 600 600 600 600 200 38kN medium term loadThe truss below is pin connected at A and E, and is acted on by the forces shown. E A D B Identify all of the ZERO-FORCE MEMBERS by checking the boxes below (if there are none, leave all boxes unchecked): BF AF BC BH CD EG -GH AB CH DG DH DE -FH
- Question 4: A W12 x 65 of A572 Grade 60 steel is used as a compression member. It is 26 feet long, pinned at each end, and has additional support in the weak direction at a point 12 feet from the top. Can this member resist a service dead load of 180 kips and a service live load of 320 kips? a. Use LRFD. b. Use ASD.Which of the following best gives the purlin load wuy? See loaded purlin. The figure shown has trusses 6m apart with midpoint sag rods and Purlins C150x12.5 spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.9 kPa (includes self wt.), wind load is 0.8 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Consider the roofing to provide full lateral support of the purlins. Fy = 345 mPa. Use the NSCP 2015 specifications. 2. 5m 2.5m 2. 5m roofing TRUSS TOP CHORD Wuy, Truss Spacing = 6m Wux 1 Purlins C150x12.5 Purlin Load Wt kN/m mm^2 mm C150x12.5 0.12 11400 12.7 152 5.1 d tw by SECTION Ix Sx rx ly sy Zy ry Zx mm mm mm^4 mm^3 mm mm^4 mm^3 mm mm^3 mm^3 mm mm 48 8.7 143 1100 112 48.4 378 65.2 1230 574 O 4.35 kN/m 5.56 kN/m O 25.02 kN.mOne plate of size 100 mm x 12 mm is lap joined to another plate of size 200 mm x 12 mm by fillet weld of size 10 mm. Lap length is 100 mm. Fillet weld is provided on all the three sides of the smaller plate. Determine the maximum axial tension the joint could carry. Assume the plates are of mild steel of grade 250 N/mm?.
- Steel Designa. Say a W12x45 is not safe against rupture, what other design considerations should be explored to increase its capacity and thereby be safe for rupture.b. Say you are to design a tension member using a C-section and found out that no C-section is safe against yielding and rupture. As a designer, what would be your approach to this? Ans. is built up section, please do explain why build up section.A tension connection consists of A36 steel double angles (two L4x4x1/4 shapes, or 2L4x4x1/4) fastened to a 4x10 No. 2 Red Oak member with a single row of four 0.875 inch A307 bolts. The connection is subjected to normal temperatures but wet in-service conditions. Assume the group action factor is C,=0.95 and the geometry factor is Ca=1. The controlling ASD load combination is D+ L where L is from occupancy. Elevation Cross Section L4x4x1/4 L4x4x1/4 Pa Р. 2L4x4x1/4 4х10 4x10 Plan L4x4x1/4 Pa/2 Pa 4x10 L4x4x1/4 Pa/2 • Determine the load, Pa, that the connection can support based on tension strength of the 4x10. Pa=. lb • Determine the load, Pa, that the connection can support based on gross tension yield of the double angles. The ASD design strength for gross tension yield is F,A,/1.67 where F=36 ksi, A,=1.93 in² for each L4x4x1/4. Pa=. lbSITUATION 2 Determine the safe service load W permitted for this beam-column that is not part of a frame system. Assume ASTM A992 (Fy = 350 MPa; Fu = 450 MPa) as material. Use LRFD specifications. Servise koada P= 30 kips dead load 80 kips live koad Assume hinged for both principal 10- 0 directions W- 20 dead load 8OG live load 10-o Fined for both principal directions Type your final answer/s in the text box provided below.
- Part A The steel bar AD has a redanguar cross section (Fgu 1) itis pin connected at its ends, detemine the maxmum alowatie ntensity of the dnteuted load that can be apoled to BC without.caaing bar ABto buckle Use a factor of safety with respoct to bucklng of 13 E200 GPa, y 360 MPa Express your answer to three significant figures and include the appropriate units + * O ? kN 1.754 Submit Poun Anwrs ReustAnsm X Incorrect Try Agein; atempts remaining Figure C1of1 Neat> Pide feeac 30 mm -20 mm -20 mm PearsonGiven the following allowable stresses:• 50 MPa for shear in rivets• 100 MPa for bearing between a plate and a rivet• 80 MPa for tension in the platesDetermine the maximum load P that can be applied to the lap joint connected bythree – 16 mm diameter rivets. Note: Draw its FBDDetermine the maximum service load P that can be resisted safely by the welded connection shown. Use ASD. E80 10 150 300 200