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RE: Slab on grade

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It's done the same way continuous highway pavements are built - with a much
higher % of longitudinal reinforcing, which entails a certain cost.  Also,
remember that the question was about a storage building, not a runway.

	-----Original Message-----
	From:	Mark K Gilligan [SMTP:MarkKGilligan(--nospam--at)]
	Sent:	Thursday, October 08, 1998 11:02 PM
	To:	INTERNET:seaint(--nospam--at)
	Subject:	RE:Slab on grade

	I find it interesting that structural engineers typically talk in
terms of
	crack control joints at 15-27 feet while it is not unheard of for
	runways to be designed with much larger spacings.

	It is my impression that many people are stuck in designing slabs on
	the way they were done 20 plus years ago.  We need to consider other
	approaches when the joints are not desirable.

	It would be interesting to hear from somebody who is knowledgable
how long
	runways are designed with no movement joints.  This would be
	appropriate since the structure being discussed will house aircraft.

	Mark Gilligan, SE