Mark Gordon Crawford
Land Surveyors in Visalia, CA
License number
Utah 174478-2203
Issued Date
May 21, 2008
Expiration Date
Mar 31, 2017
Category
Engineer/Land Surveyor
Type
Professional Structural Engineer
Address
Address
Visalia, CA
Professional information
Director Of Engineering At Us Tower Corp
Position:
Director of Engineering at US Tower Corp
Location:
Visalia, California Area
Industry:
Civil Engineering
Work:
US Tower Corp
- California since Dec 2008
-
Director of Engineering
Simpson Strong-Tie Company, Inc.
- Pleasanton, California 1998 - 2008
-
Vice President, Engineering
MGC Engineering
- California 1988 - 2000
-
Principal
Gang Nail Truss Co, & GNT Civil and Structural Engineering
- California 1991 - 1998
-
Director of Engineering
Additional Experience
- California 1979 - 1988
-
Chief Engineer
Education:
California State University-Fresno 1975 - 1979
B.S., Civil Engineering
B.S., Civil Engineering
Interests:
Sailing, backpacking, weight lifting, reading, biking, kayaking, tennis
Honor & Awards:
Engineering News Record Top 25 Newsmaker in 2004.
4 U.S. Patents
Mark Crawford - Visalia, CA
Work:
US Tower Corp
Director of Engineering Simpson Strong-Tie Co - Pleasanton, CA
Vice President, Engineering Gang-Nail Truss Co - Visalia, CA
Director of Engineering
Director of Engineering Simpson Strong-Tie Co - Pleasanton, CA
Vice President, Engineering Gang-Nail Truss Co - Visalia, CA
Director of Engineering
Education:
California State University
B.S. in Civil Engineering
B.S. in Civil Engineering
Screw Fastener In Multiple Floor Truss And Wood-To-Wood Shear Connection
US Patent:
7832173, Nov 16, 2010
Filed:
Dec 1, 2000
Appl. No.:
09/728187
Inventors:
Mark G. Crawford - Visalia CA, US
Steven E. Pryor - Dublin CA, US
Alfred D. Commins - Friday Harbor WA, US
Steven E. Pryor - Dublin CA, US
Alfred D. Commins - Friday Harbor WA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Pleasanton CA
International Classification:
E04C 3/02
US Classification:
52690, 52639, 411424
Abstract:
Screw fasteners are used to connect multiple trusses in side-by-side relationship. The screw fasteners join truss wood members which are in edge to edge relationship with the screws being driven through the edge of each wood member. The screws may be knurled screws as described in U. S. Pat. No. 6,109,850; lag screws, or standard screws. The connection may also join wood board members in edge-to-edge relationship when bending of the wood members is limited by a restraining structure.
Tension Sensor Assembly
US Patent:
2012010, May 3, 2012
Filed:
Oct 28, 2011
Appl. No.:
13/284756
Inventors:
Ken Pereira - Woodlake CA, US
Mark Crawford - Visalia CA, US
Mark Crawford - Visalia CA, US
International Classification:
G08B 21/00, G01L 1/04
US Classification:
340668, 73862621
Abstract:
A tension detector may detect and help correct tension in a lift cable. The cable may include a lift cable within a telescopic structure, such as a telescopic tower. The tension sensor may detect when the cable tension is outside a high tension threshold and a low tension threshold and trigger an alert when outside the thresholds. The alert may be an audible alert or a visual alert. A controller may prevent a user from making the tension worse and encourage an operator to correct the tension problem by preventing a winch from expanding or retracting the telescopic structure. The tension sensor may use springs to calibrate the thresholds for the high tension and low tension and a series of pulleys to manipulate an arm to engage a tension sensor.
Truss Spacer And Brace
US Patent:
6993882, Feb 7, 2006
Filed:
Dec 3, 2000
Appl. No.:
09/729507
Inventors:
Mark G. Crawford - Visalia CA, US
Louay A. Shamroukh - Walnut Creek CA, US
Jin-Jie Lin - Livermore CA, US
Louay A. Shamroukh - Walnut Creek CA, US
Jin-Jie Lin - Livermore CA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Dublin CA
International Classification:
E04C 3/02
US Classification:
52696
Abstract:
The present invention provides an apparatus for spacing structural members, in particular roof trusses, during construction and for permanently bracing the same structural members. The apparatus comprises three longitudinal members with a top attachment tab at each end that is fastened to the top side of each structural member and a pair of flanges at each end that are fastened to the facing sides of each structural member. In particular, the apparatus includes portions that reinforce the ends of ends of the second and third longitudinal members. The apparatus is preferably made in a length that is standard for spacing roof trusses, most commonly a nominal 24″. This allows the apparatus to be attached to one roof truss, then another, and left to form permanent bracing over which roof sheathing can be laid.
Strap Holding Device
US Patent:
6988346, Jan 24, 2006
Filed:
Oct 30, 2001
Appl. No.:
10/000678
Inventors:
Louay A. Shamroukh - Walnut Creek CA, US
Mark G. Crawford - Visalia CA, US
Mark G. Crawford - Visalia CA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Dublin CA
International Classification:
E04C 3/02, E04C 3/18
US Classification:
52693, 52712, 52707, 52695, 526561, 526541
Abstract:
The present invention provides a connection having a plurality of parallel structural members. The structural members are bridged by strap member, preferably light gauge steel. The end of the strap member is held in place by an overlapping strap holder. Fasteners hold the strap holder and the strap to the underlying structural member, with at least one passing through only the strap holder into the first side of the the first structural member.
Strap Holding Device
US Patent:
6877291, Apr 12, 2005
Filed:
Oct 23, 2002
Appl. No.:
10/279309
Inventors:
Louay A. Shamroukh - Discovery Bay CA, US
Mark G. Crawford - Visalia CA, US
Mark G. Crawford - Visalia CA, US
Assignee:
Simpson Strong-Tie Company, Inc. - Dublin CA
International Classification:
E04B001/38, B25G003/00
US Classification:
52702, 52704, 52708, 52715, 4032321
Abstract:
A connection in which an elongated strap or a connector having an elongated strap member is secured by a strap holder. Such straps and connectors are used in a variety of building applications, typically in connections that resist tension forces parallel to the main axes of the straps or strap members. A number of connectors with elongated strap members are in common use with a variety of structural members.