Masonry Magazine May 1966 Page. 28
The Book Mart
Precast Concrete Wall Panels. Available from American Concrete Institute, P.O. Box 4754, Redferd Station, Detroit, Michigan 48219. Price $8; to ACI members $4. Hard blue cover with 143 pages.
Available now after four years of intensive study and tests by ACI Committee 533, the publication Precast Concrete Wall Panels pinpoints problem areas of concern and their solutions to architects, engineers, material suppliers, and manufacturers of precast concrete panels.
Representing the sixth in a series of ACI Symposia publications SP-11 Precast Concrete Wall Panels includes five of the symposium papers presented at the 60th Annual ACI Convention in Houston, Texas, March 4, 1964.
Following the preface by Committee 533 chairman, W. A. Cordon, associate professor and director of structural materials research laboratory, Department of Civil Engineering, Utah State University, SP-11 contains these five papers, plus two additional original papers and also a reprint of the report of Subcommittee V of Committee 533, "Tests for Precast Concrete Wall Panels."
The seven papers are:
1. "Precast Concrete Wall Panels: Historical Review," by T. W. Hunt-According to Mr. Hunt, it is a common mistake to think of precast concrete panels as a recent development within the past 10 years. Actually limited use of panels was noted prior to 1912. These units were cast at the job site and tilted into place. However, growth in the use and variety of panels has been so spectacular in recent years that it has overshadowed much of the earlier work. Hunt's paper reviews the development of precast concrete wall panels, discusses early exposed aggregate work, panel shape, use of color, structural panels, sandwich panels, and shocked concrete.
2. "Precast Concrete Wall Panels: Materials and Tests," by J. A. Hanson and D. P. Jenny Since precast concrete wall panels have been largely responsible for the accelerated use and evaluation of concrete as an esthetic, architectural material, it is imperative that the best materials and techniques available to be used to achieve the desired results. This paper, a condensation of the deliberations of the ACI Committee 533 subcommittees, concentrates on the desired properties of concrete for concrete for wall panels, such as durability, impermeability, and appearance, as affected by the various ingredients.
3. "Precast Concrete Wall Panels Design Trends and Standards," by Victor F. Leabu-In all phases of design, construction, and to some extent, standardization, the evolutionary process in the development and use of precast concrete for wall panels has been phenomenal. Leabu's paper reviews design analyses, standards of practice, and details of precast concrete wall panels as they pertain to specific applications. It suggests a recommended practice for the design of precast wall panels.
4. "Precast Concrete Wall Panels: Manufacturing Processes," by Phillip W. Gutmann-Comparatively new is the concept of precasting architectural concrete elements which constitute an entire wall system. These units fall into the types of construction that we know of as curtain wall, or non-load bearing elements; and load-bearing.
Favorable weather is no safeguard against highway accidents, says The Travelers Insurance Companies. The overwhelming percentage of all accidents in 1965 occurred during clear and dry weather.
Saturday is the most dangerous day to drive, according to a Travelers Insurance Companies report. Nearly 22 percent of all fatal traffic accidents occurred on that day in 1965.
Drivers under 25 years of age represent only about 14 per cent of all licensed drivers in the U.S., but in 1965 they were involved in more than 30 per cent of all fatal traffic accidents and 28 per cent of all non-fatal highway mishaps.