D3841-21 – Standard Test Method Technical Guide

ASTM D3841-21, an American National Standard, provides a comprehensive specification for glass-fiber-reinforced polyester plastic panels used in construction. It covers classification, materials, workmanship, minimum physical requirements, and testing methods. The standard is approved for use by U.S. Department of Defense agencies and is not intended to restrict technological changes agreed upon between purchaser and seller.

📐 Standard Scope and Classification

This specification covers panels for general construction, with classification into types based on relative response to laboratory fire tests. However, this classification shall not be considered a fire hazard classification