Metal ducts routing from secure and non-secure areas connect through an opening in a secure wall using flexible fabric connections. The fabric connection accommodates one-half inch of expansion and contraction across the wall penetration. Metal ductwork is secured directly to the wall opening.
SECURE WALL FLEXIBLE FABRIC CONNECTION (PROVIDE FOR 1/2" EXPANSION AND CONTRACTION) METAL DUCT TO/FROM NON-SECURE AREA SECURE METAL DUCT TO OPENING IN WALL. METAL DUCT TO/FROM SECURE AREA
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