Gordon Hanley Reigstad
Engineering at 9 St, Saint Paul, MN
License number
Louisiana PE.0024876
Issued Date
May 26, 1992
Expiration Date
Sep 30, 2018
Category
Civil Engineer
Type
Civil Engineer
Address
Address
192 W 9Th St, Saint Paul, MN 55102
Professional information
Method And Apparatus For Detecting Tendon Failures Within Prestressed Concrete
US Patent:
6119526, Sep 19, 2000
Filed:
Jul 15, 1998
Appl. No.:
9/116034
Inventors:
Gordon H. Reigstad - White Bear Lake MN
Hanley S. Reigstad - Sunburg MN
Hanley S. Reigstad - Sunburg MN
Assignee:
Tech Research, Inc. - St. Paul MN
International Classification:
G01N 300
US Classification:
73803
Abstract:
A nondestructive detection apparatus for detecting tendon failures in a prestressed concrete slab. The detection apparatus includes a cart adapted to be moved over the prestressed concrete slab. A metal sensor and a distance meter are connected to the cart. As the cart is moved over the slab, the metal sensor takes readings of a length of tendon and the distance meter measures the distance traversed by the cart. The detection apparatus also includes a controller that interfaces with the metal sensor and the distance meter. The controller is constructed and arranged to sample the readings generated by the metal sensor at predetermined distance intervals traversed by the cart.