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RE: Braced Length of Steel Beam W/ Formed Slab

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If plywood is used, it is formed so that the top surface of the plywood is the same elevation as the bottom of the top flange. This locks the beam and the concrete slab together to provide continuous lateral bracing of the top flange. A detail of this is recommended so that the contractor knows how you would like the slab formed.
 
Jim K.
 
 -----Original Message-----
From: Rich Lewis [mailto:seaint03(--nospam--at)lewisengineering.com]
Sent: Friday, July 22, 2005 4:05 PM
To: seaint(--nospam--at)seaint.org
Subject: Braced Length of Steel Beam W/ Formed Slab

What would be considered the unbraced length of a beam supporting a concrete slab if no steel deck is used?  How is lateral bracing of the compression flange achieved?  Is it through the cement bond of the concrete and the top surface of the beam flange?  Are mechanical anchors of some kind required?

 

Rich