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RE: control joints in topping slabs

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If you are referring to normal concrete slabs on form deck, control joints are generally not used. The Steel Deck Institute recommends minimum reinforcing steel that is intended to control the cracks that will form in the concrete, but control joints are not generally used.

The concept is that the concrete is bonded to the steel deck and the steel deck is rigidly connected to the superstructure. The concrete is restrained by the steel.

Harold Sprague

-----Original Message-----
From: Benjamin Cornelius [mailto:bcorneli(--nospam--at)]
Sent: Wednesday, September 06, 2006 3:41 PM
To: seaint(--nospam--at)
Subject: control joints in topping slabs

Does anyone know where I'd find a recommendation for the spacing of
control joints in non-structural topping slabs cast on elevated slabs on deck?

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