Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: Steel floor plate

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Bill,
 
The deflection limit applies to industrial applications where deflection does not affect serviceability.
 
Use a lower limit when deemed necessary.
 
Bill


From: William.Sherman(--nospam--at)CH2M.com [mailto:William.Sherman(--nospam--at)CH2M.com]
Sent: Thursday, March 08, 2007 7:36 AM
To: seaint(--nospam--at)seaint.org
Subject: Steel floor plate

Table 3-18a in the AISC 13th Edition provides tabulated allowable uniform loads for "deflection-controlled applications".  The deflection limitation used is L/100.  For a 4-ft span, the maximum deflection would be about 1/2-inch - this seems rather "bouncy" to me.  Grating tables typically recommend a limit of 1/4-inch deflection under 100 psf live load for comfort - but a 3/8-inch plate at a 4-ft span designed per AISC would have about twice that deflection.  
 
What is the basis for the L/100 allowable deflection?  Does this limit provide adequate stiffness for "comfort"?