ROCKWOOL products and solutions can give considerable fire defense for metal building structures, including metal beams. Safeguard your construction. Integrity – The ability of a duct or ductwork to stay freed from cracks, holes or openings outside the compartment where a fire is present for your specified period over and https://griffinumaoc.bcbloggers.com/38387027/a-secret-weapon-for-fire-resistant-ductwork-installers