FIRE ENGINEERING
250 Fifth Avenue New York, NY 10001 Tel. (212) 481-5771 Fax (212) 725-3654
EDITOR Thomas F. Brennan
MANAGING EDITOR William A. Manning
ASSISTANT EDITOR Diane Feldman
CONTRIBUTING EDITORS
Gene Carlson
Ray Downey
Vincent Dunn
Frank L. Fire
Francis X. Holt
Richard A. Morinucci
Paul McFadden
Robert Obermayer
Ed Spahn
Curt Weldon
CONSULTING EDITORS
Jack Bennett
Francis L. Brannigan
Hugh J. Caulfield
Glenn P. Corbett
Gerald L. Grey
Walt Hendrick
Charles G. King
Edward J. McDonald
Burton W. Phelps
FEATURE DESIGN_Steve Hetzel
ILLUSTRATION Arthur Arias
PUBLISHER_Henry H. Dinneen
DIRECTOR OF BOOK PUBLISHING Daniel G. Smith
ADVERTISING COORDINATOR Denise M. Kissack
PRODUCTION MANAGER_Mike Paxton, Tulsa
CIRCULATION SERVICES, TULSA
Larry Lofton Circulofion Mgr.
Patsy Russo Mgr. Paid Circulation
PENNWELL 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 oddressed to Fire Engineering, P.O. Box 1289, Tulso, OK 74101, or coll 11800) 752-9768. Allow 30 doys tor change of oddress. Please include both old ond new addresses, ond enclose, if possible, an oddress label from o recent issue. Rates for U.S. ond possessions: 1 yr. $21.95, 2 yr. $35.95, 3 yr. $49.95. Conada ond other countries; 1 yr. $34.50,2 yr. $59.50, 3 yr. $7860. Single copy U.S. $3.50. other countries $7.00.
FIRE ENGINEERING (ISSN 0015-2587), is published monthly by PennWetl Publishing Co., 1421 S. Sheridan, Tulsa. OK 74112. March 1990, Volume 143, Number 3. Second-class postage paid at Tulso. Executive, editorial, and advertising offices of 250 Fifth Ave. New York, NY 10001. cCopynght 1989 by PennWel! Publishing Co. All rights reserved. Materiel may not be reproduced in any form without written permission of the publisher, fire Engineering is o registered trademark.
POSTMASTER: Send oddress changes to fire Engineering, P.O. Box 1289, Tulso, OK 74101.