STRUCTURAL STEEL DESIGN

Microsoft Word - Flexural Beams -5STRUCTURAL STEEL DESIGN
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DESIGN FOR SERVICEABILITY
In addition to designing for bending and shear , beams also need to be checked
for serviceability .There are two main serviceability requirements :deflection and
floor vibrations .Excessive deflections will often lead to vibration problems .
The basic deflection limit are summarized in Table below .Note that only
service level loads are used for serviceability considerations .
In design situation, it is common to develop approximate deflection equations in order to allow for quicker selection of a member based on deflection limitations.
The deflection for a uniformly loaded , simple-span beam is :
5
384
8
Faculty of Engineering Al-Mustansirya University  

Faculty of Engineering Al-Mustansirya University  
The above deflection and required moment of inertia equations are summarized in Table shown below :
Example: 
Example: 
 
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