17.3. A transfer girder has an overall depth of 11 ft and spans 22 ft between column supports. In addition to its own weight, it will pick up a uniformly distributed factored load of 4.0 kips/ft from the floor above and will carry a 14 x 14 in. column delivering a concentrated factored load of 270 kips from floors above at midspan. The girder width must be equal to or less than 16 in. Design the beam for the given loads. Find the girder width and the area and geometry of tie steel, and specify the placement details. Material strengths are f = 5000 psi and fy 60,000 psi. =

17.3. A transfer girder has an overall depth of 11 ft and spans 22 ft between column supports. In addition to its own weight, it will pick up a uniformly distributed factored load of 4.0 kips/ft from the floor above and will carry a 14 x 14 in. column delivering a concentrated factored load of 270 kips from floors above at midspan. The girder width must be equal to or less than 16 in. Design the beam for the given loads. Find the girder width and the area and geometry of tie steel, and specify the placement details. Material strengths are f = 5000 psi and fy 60,000 psi. =

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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A 66-foot long plate girder must support a uniformly distributed load and concentrated loads at the one-third points. The uniform load consists of a 1.3-kipyft dead load and a 2.3 kip/ft live load. Each concentrated load consists of a 28-kip dead load and a 49-kip live load. There is lateral support at the ends and at the one-third points. Use A572 Grade 50 steel, a total depth of 80 inches, and LRFD. a. Select the girder cross section and the required spacing of intermediate stiffeners. b. Determine the size of intermediate and bearing stiffeners. c. Design all welds
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Light-grade steel channel was used as a purlin of a truss. The top chord of the truss is inclined I V: 4 H and distance between trusses is equal to 6 m. The purlin has a weight of 79 N/m and spaced at 1.2 m. on centers. The dead load including the roof materials is 720 Pa, live load of 1000 Pa and wind load of 1.2 1.2 1440 Pa. Coefficient of Purlins pressure at leeward and windward are 0.6 and 0.2 respectively. Assume all loads passes through the centroid of the section. Truss Properties of C 200 x 76 mm Sx = 6.19 x 104 mm Sy = 1.38 x 104 mm W = 79 N/m 12 12 1.2 I Allowable bending stress Fbx= Fby = 207 MPa Truss %3D 6m O Calculate the bending stress, fox, for dead load and live load combination (D+ L). Calculate the bending stress, foy, for dead load and live load combination (D + L). O Calculate the maximum ratio of actual to the allowable bending stress for load combination 0.75 (D + L + W) at the windward side. fbx = 151.14 MPa fby = 169.6 MPa Interaction = 1.25
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