Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN: 9781337094740
Author: Segui, William T.
Publisher: Cengage Learning
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Chapter 9, Problem 9.4.1P
To determine
(a)
Whether the beam
To determine
(b)
Whether the beam
To determine
(c)
Number of studs required.
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A composite floor system consists of steel beams supporting a formed steel deck and concrete slab. The deck is shown in Figure P, and the total depth from bottom of deck to top of slab is 61⁄2 inches. Lightweight concrete is used (unit weight =115 pcf), and the 28-day compressive strength is 4 ksi. The deck and slab combination weighs 53 psf. The beams are spaced at 12 feet, and the span length is 40 feet. There is a 20psf construction load, a partition load of 20 psf, other dead load of 10 psf, and a live load of 160 psf. The maximum permissible live-load deflection is Ly/360. Use the composite beam tables and select a W-shape with Fy= 50 ksi. Design the stud anchors. Use partial composite action and a lowerbound moment of inertia. a. Use LRFD. b. Use ASD
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Chapter 9 Solutions
Steel Design (Activate Learning with these NEW titles from Engineering!)
Ch. 9 - Prob. 9.1.1PCh. 9 - Prob. 9.1.2PCh. 9 - Prob. 9.1.3PCh. 9 - Prob. 9.1.4PCh. 9 - Prob. 9.1.5PCh. 9 - Prob. 9.1.6PCh. 9 - A W1422 acts compositely with a 4-inch-thick floor...Ch. 9 - Prob. 9.2.2PCh. 9 - Prob. 9.3.1PCh. 9 - Prob. 9.3.2P
Ch. 9 - Prob. 9.4.1PCh. 9 - Prob. 9.4.2PCh. 9 - Prob. 9.4.3PCh. 9 - Prob. 9.4.4PCh. 9 - Prob. 9.4.5PCh. 9 - Prob. 9.5.1PCh. 9 - Prob. 9.5.2PCh. 9 - Prob. 9.5.3PCh. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Prob. 9.7.1PCh. 9 - Prob. 9.7.2PCh. 9 - Prob. 9.7.3PCh. 9 - Prob. 9.7.4PCh. 9 - Prob. 9.8.1PCh. 9 - Prob. 9.8.2PCh. 9 - A beam must be designed to the following...Ch. 9 - Prob. 9.8.4PCh. 9 - Prob. 9.8.5PCh. 9 - Prob. 9.8.6PCh. 9 - Prob. 9.8.7PCh. 9 - Prob. 9.8.8PCh. 9 - Use the composite beam tables and select a W-shape...Ch. 9 - Prob. 9.8.10PCh. 9 - Prob. 9.10.1PCh. 9 - Prob. 9.10.2P
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- Problem 4: A reinforced concrete beam has a width of 300 mm and an effective depth of 618 mm. Compressive reinforcement (if required) will be placed at d’ = 60mm. f’c = 25 MPa and fy = 415 MPa. The beam is to support a factored bending moment of 520 kN-m. φ=0.90. Use 2010/2015 NSCP. 1. Calculate the steel ratio for a balanced section2. Determine the governing steel ratio following NSCP requirements.arrow_forwardA rectangular beam has a width of 310mm and an effective depth of 460 mm. The beam will be designed to carry a service dead load of 250 kN.m. (including its own weight) and a service live load of 210 kN.m. Compression reinforcement, if necessary, will have its centroid 70mm from extreme concrete fiber. Use f’c = 31 MPa and fy = 415 MPa. a.)Determine the required compression steel area b.)Determine the required tension steel area.arrow_forwardA rectangular beam has b = 350 mm and d = 460 mm.the concrete compression strength is 30 MPa and the steelyield strength fy = 415 MPa. Calculate the required steelreinforcement area if the steel cover is 70 mm.use NSCP 2010 Md = 230 KN-mML = 160 KN-marrow_forward
- The width and depth of a reinforced rectangular concrete beam is 400 mm and 700 mm, respectively. The effective depth is 630 mm. The material strengths are f'c=27.6 MPa and fy=414 MPa. Determine the amount of steel reinforcement in mm2 to achieve a steel train of 0.004. and the nominal flexural strength in kN.m corresponding to a steel ratio of 1.75%arrow_forwardNeed answer asap. Will surely rate immediately :D The middle of the 5.6 m simple beam has a dimension of 350 mm by 600 mm. On that location, the beam is reinforced with 3-Ø20mm on the top and 7-Ø20 mm at the bottom. The concrete cover to be used is 40 mm. The stirrups used is 12 mm in diameter. The concrete strength of the beam is 27.6 MPa. All reinforcement used is Grade 60 (fy = 420 MPa). The beam is carrying a superimposed dead concentrated load of 55 kN and an unknown superimposed live load both at the midspan. The unit weight of concrete used is 23.6 kN per cubic meter. 1. Determine the distance of the extreme compression from the neutral axis at the correct assumption.2. Determine the unknown concentrated live load that the beam can sustain.3. Determine the design moment capacity of the beam at the midspan.arrow_forwardA rectangular beam 250 mm wide, 500 mm deep is reinforced at thebottom with 4-20-mm-diameter bars and at the top with 2-16-mmbars. Concrete cover to bar centroid at the top is 80 mm and at thebottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yieldstrength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. 1. Determine the limiting tensile steel ratio for a tension controlledcondition in positive or negative bending with the given materialstrengths. ρt = [r] in 5 decimal places (ex. 0.00001)arrow_forward
- Problem 4: A reinforced concrete beam has a width of 300 mm and an effective depth of 618 mm. Compressive reinforcement (if required) will be placed at d’ = 60mm. f’c = 25 MPa and fy = 415 MPa. The beam is to support a factored bending moment of 520 kN-m. φ=0.90. Use 2010/2015 NSCP. Determine the governing steel ratio following NSCP requirements.arrow_forward1. A reinforced concrete beam has a width of 300 mm and an effective depth of 618 mm. Compressive reinforcement (if required) will be placed at d’ = 60mm. f’c = 28 MPa and fy = 415 MPa. Use 2010/2015 NSCP. Use ? = 0.90 for flexure. At ultimate condition U = 1.2D +1.6L. a) If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the required design flexural strength of the section. b) If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the number of 28mm bars required as tension reinforcementarrow_forwardA singly reinforced rectangular beam has a dimension b 310 mm and d = 410 mm Factored moment is equal to 100 kN-m, Concrete compressive strength is 24 MPa, Steel yield strength is 275 MPa and the reduction factor is 0.9. Determine the required steel area in mm?arrow_forward
- A rectanguler beam with dimensions b = 280 mm and h = 510 mm is reinforced with 5-20mmØ at the tension side only. Using NSCP 2010/2015. Compute the design strength of the beam in kN-m. Use fc' = 25 MPa, fy = 414 MPa. Concrete covering from the centroid of reinforcement is 60 mm.arrow_forwardA composite floor system uses formed steel deck of the type shown in Figure . The beams are W18 x 50, and the slab has a total thickness of 41⁄2 inches from top of slab to bottom of deck. The effective slab width is 90 inches, and the span length is 30 feet. The structural steel is A992, and the concrete strength is f,c= 4 ksi. Compute the nominal flexural strength with two 3⁄4-inch 3 31⁄2-inch studs per rib.arrow_forwardrectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yield strength fy = 420 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. Determine the maximum steel area for a tension controlled singly reinforced condition in positive bendingarrow_forward
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