This specification covers asbestos-cement insulating panels consisting of a core of insulating fiber board sandwiched between, and bonded to, two sheets of asbestos-cement facing board. Asbestos-cement insulating panels are designed for exterior and interior walls, partitions, curtain walls, roof decks, and for decorative purposes. Asbestos-cement insulating panels shall be composed of an insulating core sandwiched between, and bonded to, two facing sheets of asbestos-cement. The following test methods shall be performed: flexural strength; vapor permeability; thermal resistance; adhesive line bond; and dimensional measurements.

1.1 This specification covers asbestos-cement insulating panels consisting of a core of insulating fiber board sandwiched between, and bonded to, two sheets of asbestos-cement facing board. Asbestos-cement insulating panels are designed for exterior and interior walls, partitions, curtain walls, roof decks, and for decorative purposes.

1.2 All measurements and tests necessary for determining the conformity of asbestos-cement insulating panels with this specification are made in accordance with the methods covered in Section 9.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4 WarningBreathing of asbestos dust is hazardous. Asbestos and asbestos products present demonstrated health risks for users and for those with whom they come into contact. In addition to other precautions, when working with asbestos-cement products, minimize the dust that results. For information on the safe use of chrysoltile asbestos, refer to “Safe Use of Chrysotile Asbestos: A Manual on Preventive and Control Measures.”

1.5 The following safety hazards caveat pertains only to the test method portion, Section 9, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See 1.4 for a specific hazard warning. ^REFERENCE:

ASTM Standards:

C150 Specification for Portland Cement

C208 Specification for Cellulosic Fiber Insulating Board

C220 Specification for Flat Asbestos-Cement Sheets

C236 Test Method for Steady-State Thermal Performance of Building Assemblies by Means of a Guarded Hot Box (Withdrawn)

C458 Test Method for Organic Fiber Content of Asbestos-Cement Products

C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

C595 Specification for Blended Hydraulic Cements

C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

D2946 Terminology for Asbestos and Asbestos–Cement Products

E96/E96M Test Methods for Water Vapor Transmission of Materials

Federal Standard:

Fed. Std. No. 123 Marking for Shipment (Civil Agencies)

Military Standard:

MIL-STD-129 Marking for Shipment and Storage

Other Standards:

Uniform Freight Classification Rules

National Motor Freight Classification Rules