Masonry Magazine January 1968 Page. 46

Masonry Magazine January 1968 Page. 46

Masonry Magazine January 1968 Page. 46


here's a Strong - Portable - Reliable - and Inexpensive answer For Your Hoisting Needs

wyco LAD-E-VATOR Lifts up to 1250 lbs. 80 ft. high; pulls behind any car or truck; sets up in less than 10 minutes; completely automatic. For full information, write for the all new catalog WL-67 LAD-E-VATOR Division of Wyco Tool Co. P. O. Box 306 Des Plaines, Ill.


International Conference

(Continued from page 45) The conference was being conducted by the College of Engineering at The University of Texas at Austin. Sponsors are the National Science Foundation, Clay Products Association of the Southwest and Structural Clay Products Institute. Co-chairmen were Professor J. Neils Thompson of the University's Civil Engineering Department and Dr. Franklin B. Johnson, chairman of the Department of Architectural Engineering. University of Texas at Austin.

Members of this steering committee are (left to right) Co-chairman Dr. Franklin B. Johnson of the University of Texas: Harry B. Zackrison, Sr., of Washington, D. C.; Dean D. K. Sargent of Syracuse University: Professor Harold Hauf of the University of Southern California: Co-chairman Professor J. Neils Thompson of the University of Texas: Professor Albert G. H. Dietz of the Massachusetts Institute of Technology: Clarence B. Monk of Purdue University: Dr. P. T. Mik luchin of Toronto: William J. LeMessurier of the Massachusetts Institute of Technology; and Conference Secretary Clayford T. Grimm.

The Mason Contractors Association of America served as an advisory organization to the Conference and George Miller, Executive Vice President, served as a panel member for Session VIII-Construction, during which papers on Prefabrication, Mechanization and Labor Productivity were presented.


Nondestructive Testing Techniques

An experimental research program conducted to determine the feasibility of using ultrasonic nondestructive testing techniques to reveal earthquake damage, deterioration and internal structure-weakening construction flaws in the masonry walls of California's school buildings has been completed by the Aerojet-General Corporation in Sacramento, California.

The program, sponsored by the Schoolhouse Section of the State of California's Office of Architecture and Construction, successfully confirmed the practicability of an electronics approach to the detection of small defects, packed sand and gravel as well as large cracks, flaws and foreign objects in the grout cores of masonry walls.

"We are very pleased with the results of this feasibility study by Aerojet-General," stated John F. Meehan, Research Director for the Schoolhouse Section, "and it appears that equipment and techniques can be developed to a point where sonics will be widely used on both masonry and concrete construction to determine structural integrity. An inspection process such as this should certainly lead to economics in construction."

Four special test wall panels constructed to represent six types of masonry walls commonly found in California school buildings were given ultrasonic tests by Aerojet engineers. These exploratory tests revealed both the intentionally implanted flaws and the unintended imperfections found in the test panels.

Through the use of ultrasonic NDT technique it was learned that this process could obviate the current ex-masonry January, 1968


Masonry Magazine December 2012 Page. 45
December 2012

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Masonry Magazine December 2012 Page. 46
December 2012

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Masonry Magazine December 2012 Page. 47
December 2012

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Masonry Magazine December 2012 Page. 48
December 2012

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