This specification covers the classification, materials of construction, workmanship, physical requirements, and methods of testing glass-fiber-reinforced polyester composite wall and ceiling panels intended for use in light construction and semi-structural applications. The panels shall be divided into four classifications based on relative response to the laboratory flammability: Class A; Class B; Class C; and Class D. These classifications may be further subdivided into grades based on nominal thickness when tested: Grade 1; Grade 2; Grade 3; Grade 4; Grade 5; Grade 6; and Grade 7. The polyester resin used in the composite shall be a thermosetting polyester resin with cross-linking monomers composed of polymeric esters in which the recurring ester groups are an integral part of the main polymer chain. The resin shall be reinforced with glass fibers. Conditioning; length and width; squareness; thickness; camber; color; impact resistance; and burning characteristics tests shall be performed to conform to the requirements specified.

1.1 This specification covers the classification, materials of construction, workmanship, physical requirements, and methods of testing glass-fiber-reinforced polyester composite wall and ceiling panels intended for use in light construction and semi-structural applications.

1.2 Supplementary information on chemical resistance, impact resistance, and installation practice are provided in Appendix X1.

1.3 The classification of these composite panels into classes based on relative response to a laboratory test shall not be considered a fire-hazard classification.

1.4 Laboratory flammability tests (Test Methods E84 and D1929) applicable to this specification should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or conditions. However, results may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.

1.5 The intent of this specification is to define the class, grade, and general laminate properties of the composite wall and ceiling liner panels in order to ensure a quality product which will perform in the intended application. This specification is not intended to restrict or limit technological changes affecting performance when changes are agreed upon between the purchaser and manufacturer.

1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.

1.7 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in Tables and Figures) shall not be considered as requirements of this specification.

1.8 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.