A column with an unbraced length of 20 feet must resist a factored load of Pu=200 kips. Select the lightest W-shape to support this load considering W8, W10, W12, and W14 shapes. K = 0.5 and the steel is ASTM A992 Grade 50.
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- An I-section with two cover plates is used as tension member and is subjected to a load of 120 t over a length of 16 m. If the allowable tensile stress is 15000 kg/cm², is the member design safe? If 9821.6 cm4, so, find the factor of safety. Use ISWB 300@ 48.1 kg/m, A = 61.33 cm², Ixx Ivy 990.1 cm4. There are two rows of fasteners in each flange, thus making atleast two holes in one section. The fastener diameter is 22 mm, cover plate size 260 mm x 8 mm, flange thickness of l-section = 10 mm. The center of fastener is located at 60 mm from center line of the l-section. = =2) Find the axial stresses of menbers FD, GD, GE State if it is tensile or Compressive. 4M 3M A LE 3m G 20 RN Go KNDetermine the safe load of the column section shown, if it has a yield strength of 25 MPa. E = 200000 MPa. Use NSCP Specifications. Fyz248 mpa Properties of Channel Section d = 305 mm t₂ = 7.2 mm A = 3929 mm² t₁ = 12.7 mm Ix=53.7 x 10mm¹ x = 117 mm Properties of W 460 x 74 A = 9450 mm² b = 190 mm ly= 1.61 x 10 mm x = 17.7 mm tw = 9.0 mm rx = 188 mm ry = 41.9 mm d = 457 mm tr = 14.5 mm Ix = 333 x 10 mm Iy = 16.6 x 10mm* 7.21 When the height of column is 6 m. When the height of column is 10 m. Assume K= 1.0 457 CIVIL ENGINEERING- STEEL DESIGN
- The tension member shown below is C12 x 20.7 of A36 steel. Will it safely support a service dead load of 160kN and a service live load of 325kN? Use equation 3.1 for U. A. Use LRFD B. Use ASD Note: Use SI units (mm) for the following dimensions; Use CSI Steel for the Steel Properties. 12" 22" 22" 22" ооо ооо оооо 7/8-in.-diameter bolts C12 x 20.7Estimate the cross-sectional area of a 350S125-27 cold-formed shape. a. If the member is tested in tension, what would be the maximum force thesample could carry before reaching the yield strength if the steel has ayield strength of 225 MPa?b. Would you expect a 2.5 m stud to carry the same load in compression?(explain)The A992 structural steel bar and a 2014-T6 aluminium bar shown below are secured to rigid supports at ends A and B and are connected together by a 1” diameter tool steel pin in double shear. The pin slides freely into place at room temperature. Determine the shearing stress on the pin caused by a 60 degree F drop in temperature and comment on its ability to carry the applied load. L L - 1" dia. pin A Steel area = 1 in.² Aluminum area = 2 in.² B
- Rigid member BED is supported using steel rods AB, CD, and EF as shown below. E-200 GPa for steel. If a force P is applied at E, determine: a) The stress in each rod b) The length of each rod after applying the force LI (mm) LI (mm) P (kN) AAB (mm2) ACD (mm?) AEF (mm) 395 350 20 250 250 450 L1 L2 Note: BE ED P.7 7a 7b 7c Alaterally supported beam was designed for flexure. The beam is safe for shear & deflection. The most economical section is structural tubing 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? The section is 8" x 8" x 7.94 mm thick: Use Fy=248 MPa: E=200,000 MPa AISC wall thickness Ix 106 S x 103 Jx 103 mm4 mm3 mm4 rx =ry Area Ag (mm2) mm Designation Weight/m 8x8 7.94 47.36 6,039 79.25 37.84 371.99 60.35 expla'n briefly your cho'ce. (transform your comparative analys's 'nto a narative form to support your cho'ce) 8x8 14.29 80.61 10,258 76.2 59.52 585.02 99.06 8x8 72.7 9,290 76.96 54.53 539.13 90.32 8x8 9.53 56.09 7,161 78.48 44.12 432.62 70.76 mm 12.7 Zx 103 mm3 437.53 714.48 650.57 512.92A W16X31 A992 steel is used as a beam. The beam has a continuous lateral support. The uniformly distributed load shown in the figure is a service load that consists of 50% dead load (included the beam weight) and 50% live load. Using LRFD, determine the following? Note: A992 STEEL Fy = 50 ksi Ag = 9.13 in^2 Zx = 54.0 in^3 a. Ultimate (Governing Load Combo) Maximum Negative Moment (at support) in kips-ft b. Ultimate (Governing Load Combo) Maximum Positive Moment (at midspan) in kips-ft c. The Flexural Capacity of the Beam in kips-ft d. Demand Capacity Ratio of Beam really need answer please
- The light rigid bar ABCD shown is pinned at C and connected to two vertical rods. The bar was initially horizontal, and the rods were stress-free before the load P 20 KN is applied. Sheel E200 GPa L-1 m 2.0 m 0.6m 1.5m P-20 KN Aluminum E-70 GPa A=900mm L-1.5 m What is the axial load at steel rod in KN?A W21 x 57 of A992Gr50 steel column having length of 6 m and is fixed at both ends. (Gr50 steel = 50 ksi = 345 MPa = Fy) is used to carry a load of 900 kN dead load and 400 kN live load. Note: Use NSCP 2015 Properties of W21 x 57 A 10800 mm d = 536 mm bf = 167 mm tr = 16.5 mm tw 10.3 mm Kdes rx = 212 mm Ry = 34.3 mm = 29.2 mm a. Calculate the critical slenderness ratio of the W section if the column is braced at midpoint of the weak axis b. Calculate the compressive capacity of built-up section using ASD and LRFD c. Calculate the demand-capacity factor, Is the section adequate?The light rigid bar ABCD shown is pinned at C and connected to two vertical rods. The bar was initially horizontal, and the rods were stress-free before the load P= 20 KN is applied. Sleel E-200 GPa A-400mm L1 m 2.0 m 0.6 m 1.5m P-20 KN Aluminum E70 GPa A-900mm L-1.5 m 1. Axial load at steel rod in kN? 2. Axial stress at steel rod in MPa? 3. Axial deformation of aluminum rod in mm? 4. Axial deformation of steel rod in mm? 5. Axial Load at aluminum rod in kN?