FIRE ENGINEERING
250 Fifth Avenue New York, NY 10001 Tel. (212) 481-5771 Fax (212) 725-3654
EDITOR
Thomos F. Brennan
MANAGING EDITOR
William A. Manning
ASSISTANT EDITOR
Diane Feldman
CONTRIBUTING EDITORS
Frank L. Fire
Vincent Dunn
Ray Downey
Gene Carlson
Paul McFadden
CONSULTING EDITORS
Jack Bennett
Francis L. Brannigan
Hugh J. Caulfield
Glenn P. Corbett
Wall 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
Circulation Manager
Patsy Russo
Monager Paid Circulation
ADVERTISING SALES
NORTHEAST: Henry H. Dinneen, Publisher,
250 Fifth Ave., New York, NY 10001 Tel. (212) 481-5771, Fax (212) 725-3654
SOUTHEAST: Harry W. Dill, Regional Monager, 6406 Carmel Rd., Suite 308, P.O. Box 2347, Charlotte, NC 28226 Tel. (704) 542-8893, Fax (704) 542-7357
MIDWEST: Don Johnson, Al Gravenhorst, Gravenhorst & Assoc, Inc., 5901 N. Cicero Ave., Chicago, IL 60646 Tel. (312) 545-8621, Fax (312) 545-5138
WEST COAST AND SOUTHWEST: Karl Keeler, Western Manager, 915 Stewarton Way, Glendale, CA 91207 Tel. (818) 500-0693, Fax (818) 548-9204
PENNWELL PUBLISHING COMPANY
P.O. Box 1260 Tulsa, OK 74101 (918) 835-3161
CHAIRMAN
Philip C. Loumger, Jr.
PRESIDENT
Joseph A. Wolking
GROUP VICE PRESIDENT
Joseph T. Bessette
SUBCRIPTION: All subscription correspondence should be addressed to Fire Engineering, P.O. Box 1289, Tulso, OK 74101, or coll 1 (800) 627-3210. Allow 30 days for change of address. Please include both old and new addresses, ond enclose, if possible, on address label from a recent issue. Rates for U.S. and possessions: 1 yr. $21.95, 2 yr. $35.95, 3 yr. $49.95. Canada ond other countries: 1 yr. $34.50,2 yr. $59.50, 3 yr. $78.50. Single copy U.S. $3.50, other countries $7.00.
FIRE ENGINEERING (ISSN 0015-2587), is published monthly by PennWell Publishing Co., 1421 S. Sheridan, Tulso, OK 74112. November 1989, Volume 142, Number 11. Second-class postage poid at Tulso. Executive, editorial, and advertising offices at 250 Fifth Ave., New York, NY 10001. Copyright 1989 by PennWetl Publishing Co. All rights reserved. Material may not be reproduced in any form without written permission of the publisher. Fire Engineering is a registered trademark.
POSTMASTER: Send address changes to Fire Engineering. P.O. Box 1289, Tulso, OK 74101.
