Title

Fire Test Ratings for Shelter Components

Creator

Hedge, J. C.

Waterman, T. E.

Publisher

IIT Research Institute

Date

1969

Identifier

AD0700940

AD0700940

Abstract

The work described herein is concerned with providing interim guidance for assessing fire effects on shelters of the type to withstand 10 to 15 psi overpressures. Such shelters can be expected to be at or below grade, and to be constructed of reinforced concrete capable of resisting penetration. The work is directed toward assessing the heat transfer through concrete, and the penetration of fire gases through door assemblies, as a result of uncontrolled fire in contact with the shelter. Based on existing data for properties of concrete and characteristics of debris fires, a theoretical analysis is used to predict the heat loads imposed on shelters by debris fires above. Results are given for ranges of fire conditions, concrete properties, and concrete thickness, and a method is suggested for estimating cooling requirements needed to remove the fire-induced heat load. Experiments were performed with six door assemblies, similar in design to blast-resistant assemblies, in order to evaluate penetration of fire gases. Early experiments showed that bare steel doors, as well as doors protected only by insulative or ablative coverings, were rapidly distorted by heating so as to be unacceptable as barriers to fire gases. In later experiments, the design of a water-cooled door assembly was evolved, which is recommended for protection of shelter entryways from adjacent fires.

Date Issued

1969-05

Extent

56

Corporate Author

IIT Research Institute

Corporate Report Number

Final Technical Report Project J6132

Contract

N00228-68-C-0569

Distribution Conflict

No

Access Rights

"This document has been approved for public release and sale; its distribution is unlimited."

Photo Quality

Not Needed

Distribution Classification

1

DTIC Record Exists

Yes

Report Availability

Full text available by request

Provenance

Underwriters Laboratories (UL)

Type

report

Format

56 pages ; 28 cm.