J. Darrin Holt
Engineers at Dorleath Ct, Raleigh, NC
License number
South Dakota 7443
Expiration Date
Oct 31, 2017
Category
Professional Engineer
Type
Civil
Address
Address
1225 Dorleath Ct, Raleigh, NC 27614
Phone
(919) 608-4658
Professional information
Cto At Therasim, Inc.
Location:
Raleigh-Durham, North Carolina Area
Industry:
Information Technology and Services
Method Of Mapping Steel Reinforcements In Concrete Foundations
US Patent:
7548192, Jun 16, 2009
Filed:
Feb 7, 2008
Appl. No.:
12/027503
Inventors:
J. Darrin Holt - Raleigh NC, US
Assignee:
FDH Engineering, Inc. - Raleigh NC
International Classification:
G01S 13/89, G01S 13/88, G01S 13/00
US Classification:
342191, 342 21, 342 22, 342 27, 342175, 342176, 342179, 342190, 342195
Abstract:
A method of mapping steel reinforcements in an existing concrete foundation. The method includes determining the depth of the concrete foundation. Further the method entails transmitting radar signals into at least one section of the concrete foundation and collecting reflection data in response to the radar signals being transmitted into the concrete foundation. Based on the collected reflection data, determining the general location of at least some of the steel reinforcements in the concrete foundation. Thereafter, surgically cutting into the concrete foundation and exposing at least some of the steel reinforcements in a portion of the concrete foundation. Once some of the steel reinforcements are exposed, the method entails measuring the size and spacing of the steel reinforcements. Based on the exposed steel reinforcements and the measurements taken, mapping the steel reinforcements throughout at least a portion of the concrete foundation by illustrating, for example, the size of steel reinforcements, the spacing between the steel reinforcements, and the location of the steel reinforcement relative to one or more selected dimensions of the concrete foundation.
Method Of Determining Tension In A Rod
US Patent:
8096195, Jan 17, 2012
Filed:
Jan 4, 2011
Appl. No.:
12/984136
Inventors:
Mark Cesare - Raleigh NC, US
J. Darrin Holt - Raleigh NC, US
J. Darrin Holt - Raleigh NC, US
Assignee:
FDH Engineering, Inc. - Raleigh NC
International Classification:
G01L 5/04
US Classification:
7386242, 7386259
Abstract:
A method of determining the tension in an elongated rod is described. The method includes impacting the rod and measuring the vibration response of the rod. Further, the method entails generating a theoretical vibration response of the rod based in part at least on the structural properties of the rod. Thereafter, the method entails adjusting the theoretical vibration response to cause the theoretical vibration response to conform with at least a portion of the measured vibration response. Based on the adjusted theoretical vibration response, the tension of the rod is determined.
Method For Determining Tension In A Rod
US Patent:
8176800, May 15, 2012
Filed:
Aug 17, 2009
Appl. No.:
12/542134
Inventors:
Mark Cesare - Raleigh NC, US
J. Darrin Holt - Raleigh NC, US
J. Darrin Holt - Raleigh NC, US
Assignee:
FDH Engineering, Inc. - Raleigh NC
International Classification:
G01L 5/04
US Classification:
7386242, 73826
Abstract:
A method of determining the tension in an elongated rod is described. The method includes impacting the rod and measuring the vibration response of the rod. Further, the method entails generating a theoretical vibration response of the rod based in part at least on the structural properties of the rod. Thereafter, the method entails adjusting the theoretical vibration response to cause the theoretical vibration response to conform with at least a portion of the measured vibration response. Based on the adjusted theoretical vibration response, the tension of the rod is determined.