A W 10 x 30 is used as a beam to support a concrete floor system. The floor is to carry a total load of 4.2 kPa. The beam is simply supported over a span of 8.4 m. The properties of the section are as follows: Depth = 254 mm Thickness of web = 19.2 mm Moment of Inertia = 98 x 106 mm4 Section modulus = 530 x 103 mm3 Weight = 44.86 k9/m   Assume the beam is laterally supported over its length and that the allowable stress in bending is 0.66 Fy and in shear on gross section is 0.4Fy . Use A36 steel with Fy = 250 MPa. Determine the center-to-center spacing of the beams without exceeding the allowable shear stress.  Determine the center-to-center spacing of the beams without exceeding the allowable bending stress.  Which will be the center-to-center spacing of the beams to consider?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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  1. A W 10 x 30 is used as a beam to support a concrete floor system. The floor is to carry a total load of 4.2 kPa. The beam is simply supported over a span of 8.4 m. The properties of the section are as follows:

Depth = 254 mm

Thickness of web = 19.2 mm

Moment of Inertia = 98 x 106 mm4

Section modulus = 530 x 103 mm3

Weight = 44.86 k9/m

 

Assume the beam is laterally supported over its length and that the allowable stress in bending is 0.66 Fy and in shear on gross section is 0.4Fy . Use A36 steel with Fy = 250 MPa.

  1. Determine the center-to-center spacing of the beams without exceeding the allowable shear stress. 
  2. Determine the center-to-center spacing of the beams without exceeding the allowable bending stress. 
  3. Which will be the center-to-center spacing of the beams to consider? 
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Transcribed Image Text:L Beam Beam Beam
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