Obituaries

Bill Nagle, 56, vice president-softwood lumber for Georgia-Pacific Corp., Atlanta, Ga., died June 8.

He joined Georgia-Pacific in 1982 as group mgr.-softwood lumber and was promoted to v.p.-Mid-Continent wood products manufacturing division, v.p.-lumber distribution, and v.p.-specialty wood products before he was named v.p.-softwood lumber in May 1996.

He was active in the Forest Products Research Society and Society of American Foresters and was a current director of the Southern Forest Products Association.

Concrete Makes Hardcore Doors

Do you think you've seen it all when it comes to doors-vinyl, wood, aluminum? How about concrete?

You just may see concrete doors on the market within two years if two North Carolina State University architecture professors successfully can engineer light'weight concrete doors using special reinforcement materials.

Combining recent textile and construction technologies with architectural design, Christos Saccopoulos and Frank Harmon have developed four prototype doors incorporating a hinged plywood form that uses superstrong, threedimensional fabrics to reinforce the concrete. The doors are hung on a vertical pivoting mechanism.

Even though the frst door weighed more than 300 lbs. and the second door, made of a lighter-weight aggregate, weighed less than 200 lbs., Saccopoulos and Harmon remain confident that the doors' weight can be reduced.

"There are three things we're experimenting with to reduce the weight: the type of aggregate, the reinforcement material and the geometry of the door," explained Saccopoulos.

PRACTICAL CONCRETE D00RS may be available wihin the next two years if professors Frank Harmon (left) and Christos Saccopoulous (tight) successf ully can combine lighhreight aggegates, reinforcement material and geometry to bring these prototype doors to a marketable weight.

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