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Snapback Testing

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Have a building or structure that is just a little too big to be tested on a shake table or even in a lab?  Want to study the dynamics of the structure?  Then the ANCO HEAVE line of products is what your looking for.  The HEAVE Quick Release Link is a device that utilizes "snapback testing" to excite and study the dynamics of structures.  It is designed to allow for tensioning of a cable, then suddenly releasing that tension or load, causing reverberation throughout the structure (as shown below).  There are four distinct models available with load capacities varying from 4,500 lbs (20kN) to 36,000 lbs (160kN), but as with all ANCO products, one can be custom designed to fit your needs.

How It Works:

The HEAVE is operated by latching onto a shackle clevis pin which is restrained from being released by the Flip Lever.  The Flip Lever is prevented from flipping downwards by the Release Lever.  To prevent accidental release, a Safety Pin is inserted in the metal of the machine blocking any movement of the Release Lever until such time release is desired.  Once the test object is appropriately hooked up and the test is ready to start, the Safety Pin is removed.  Once the Safety Pin is removed, the Release Lever is able to move, but should not do so until it is pushed backwards by striking it with a hammer or applying a lever or wrench to the Release Lever handle.  This will allow the Flip Lever to more downwards and thereby release the shackle.

 HEAVE Model Family

Highest Load Rating 

lbs (kN)
HEAVE 1 4,500 (20)
HEAVE 2 9,000 (40)
HEAVE 3 18,000 (80)
HEAVE 4 36,000 (160)

Picture above is of the HEAVE 4 model

 

 

 

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Last modified: March 09, 2006