512-8496620EXTHULLVENTMATERIALREPLACEMENTLOUVERS.PDF
Published: 11/21/2017
Description
MATERIALS, FIT UP AND WELDING TO SURVEYOR'S SATISFACTION. Comment L-001: In accordance with NVIC 9-97, Section 3.7.2, all ventilation ducts must be constructed of noncombustible materials. However, short sections of combustible materials must m...
