FIRE ENGINERING
250 Filth Avenue • New York, NY 10001 (212) 481-5771
EDITORIAL STAFF
EDITOR Thomas F. Brennon
MANAGING EDITOR William A. Manning
ASSISTANT EDITOR Sheila Smith Noonon
CONTRIBUTING EDITORS
Gene Carlson
Paul McFadden
Frank L. Fire
Vincent Dunn
CONSULTING EDITORS
Jock Bennett
Francis L. Brannigan
Hugh J. Caulfield
Glenn P. Corbett
Walt Hendrick
Charles G. King
Edward J. McDonald
Burton W. Phelps
PUBLISHER Henry H. Dinneen
BUSINESS STAFT
BUSINESS MANAGER Daniel G. Smith
MARKETING SERVICES MANAGER Wendy Chusid
SALES COORDINATOR Knstiano Wistort
PRODUCTION MANAGER Mike Paxton, Tulsa
CIRCULATION SERVICES
Mike Blake
General Manager, Tulsa
Patsy Russo Supervisor, Tulsa
ADVERTISING SALES
NORTHEAST: Henry H. Dinneen, Publisher. 250 Filth Ave., New York, NY 10001 (212) 481-5771
SOUTHEAST: Horry W. Dill, Regional Manager,6406 Carmel Rd., Suite 308, P.O. Box 2347, Charlotte, NC 28226 (704) 542-8893
MIDWEST: Don Johnson, Al Gravenhorst, Grovenhorst & Assoc. Inc., 5901 N. Cicero Ave., Chicago, II60646 (312) 545-8621
WEST COAST AND SOUTHWEST Karl Keeler, Western Manager. 915 Steworton Way, Glendale, CA 91207 (818) 500-0693
PENNWGLL PUBLISHING COMPANY
P.O. Box 1260 • Tulsa, OK 74101 (918; 835-3161
CHAIRMAN Philip C. Louinger, Jr.
PRESIDENT_Joseph A, Wolking
GROUP VICE PRESIDENT Joseph T. Bessette
SUBSCRIPTIONS: All subscription correspondence should be addressed to Fire Engineering, P.O. Box 1289. Tulso, OK 74101, or call 1 (800; 627-3210. Allow 30 days for change of address. Piease include both old and new addresses, ond enclose, if possible, an address lobe! from a recent issue. Rotes for U.S. and possessions: 1 yr., $18.95, 2 yr. $30.95, 3 yr. $42.95. Canoda ond other countries: 1 yr. $30.00,2 yr. $52.00, 3 yr. $68.00. Single copy U.S. $3.00, other countries $6.00.
RRE ENGINEERING ISSN 0015-2587), October 1988, Volume 141, Number 10. Published monthly by PennWeli Publishing Co., 1421 S. Sheridon Rd., P.O. Box 1260, Tulsa. OK 74101. Sec ond-class postage paid at Tulsa. Executive editorial ana advertising offices at 250 Fifth Ave New York, NY 10001. ‘Copyright 1988 by PennWei! Publishing Co. A rights reserved. Material may not be reproduced in ony form without written permission of the publisher. Fire Engineering is a registered trademark.
POSTMASTER: Send oddress chonges to Fire Engineering, P.O. Box 1289, Tulsa, OK 74101.
