The American Society for Testing and Materials (ASTM), Test Method E-84 or ASTM E-84, comparatively measures the surface burning traits of industrial fabrics by observing flame spread and the amount of smoke developed.  This classifies the fabric as Class A, Class B, or Class C.
Purpose: Rates flame spread and smoke development of interior finish building materials.
Method: As application dictates (wrapped panels, glued fabric, etc.) samples are laid in 25’ tunnel and lit aflame at one end.
Test: Measures how far and fast flames travel and the amount of smoke that develops.
Association for Contract Textiles (ACT) Recommendation: Flame spread of 25 and smoke dev. of 450 or less for Class 1/A
Notes: This is usually considered to include any items that are a part of the structure.
For products that pass these criteria:
Class A, Flame Spread 1-25, Smoke Developed Less than or equal to 450
Class B, Flame Spread 26-75, Smoke Developed Less than or equal to 450
Class C, Flame Spread 76-200, Smoke Developed Less than or equal to 450.
Please note, this test is comparable to UL 723, ANSI/NFPA No 255, and UBC No. 8-1