An exterior mechanical shaft wall is built with eight-inch ground face concrete masonry units featuring an integral color finish. The wall assembly complies with Underwriters Laboratories design number U904. Steel or stainless steel framing members provide structural support for the shaft enclosure.
EXTERIOR MECHANICAL SHAFT E8: TYPICAL 3HR RATED SHAFT ASSEMBLY - 8" CMU GROUND FACE - INTEGRAL COLOR NOTES: - WALL PER UL DESIGN NO. U904 - STEEL OR STAINLESS STEEL FRAMING MEMBERS EXTERIOR
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