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Close up of a flame torch testing flame retardant material, demonstrating fire resistance and safety
The worker screwing plasterboard to the ceiling. He is using special electric screwdriver and drywall lift. A red plasterboard improve the fire resistance of ceiling structures.
Fire-resistant door must remain closed to prevent smoke and flame spread, as instructed by fire department authority.
Buildings and structures style from colonia to modern brick masonry favorable for its fire and weather resisting qualities. Industrial era type of construction.
The worker screwing plasterboard to the ceiling. He is using special electric screwdriver and drywall lift. A red plasterboard improve the fire resistance of ceiling structures.

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Metal siding on building on college campusImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/metal-siding-building-college-campus-39092284">Image used under license from Freestock.com</a>
Metal siding on building on college campusImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/metal-siding-building-college-campus-39361579">Image used under license from Freestock.com</a>

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