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RE: Tilt Up Construction & Lock Wall?

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Locks in your context are channels through dams with doors on each end and
means to pump water in and out.  Their purpose is to allow river traffic to
make the abrupt change in elevation required to transit the dam.  There are
many in use in the U.S. and England, and many are very old as structures go.
So given a concrete wall submerged for many years, and subject to physical
damage from barge impacts, there is a necessity for repair to the surface.

	-----Original Message-----
	From:	cstsaur(--nospam--at)ms1.hinet.net [SMTP:cstsaur(--nospam--at)ms1.hinet.net]
	Sent:	Wednesday, November 18, 1998 5:33 PM
	To:	seaint(--nospam--at)seaint.org
	Subject:	Tilt Up Construction & Lock Wall?

	Can anybody tell me what is "Tilt Up Construction"?
	And what is a "Lock Wall"?-- appeared in a English book about
surface repair of concrete 
	structures.
	 
	Any info are welcomed.
	 
	 
	Regards
	 
	        Tsaur@Taiwan