Ul duct penetration

Firestop systems are investigated after the fill, void or cavity materials are fully cured. Tests using horizontal and vertical furnaces and multistory equipment ensure that buildings and their installed mechanical systems meet and maintain the hourly rating required for fire-resistive floor and wall assemblies. If condition E is not met, a mechanical bond may be obtained by wrapping the structural member with expanded metal lath minimum 1. Additionally, the Restrained Beam Rating of the structural member being transferred should be equal to or greater than the Restrained Assembly Rating of the roof assembly into which the structural member is being transferred. Open-web steel joists, steel beams, or metal decking supporting continuous concrete slab.
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Firestops and Joints

A dynamic fire damper is tested and rated for closure under elevated temperature airflow. Materials used in the firestop systems are intended to be installed in accordance with the manufacturer's instructions provided with the materials. Leakage-rated Smoke Dampers EMME are intended for use where air ducts and air-transfer openings traverse smoke barriers. The thickness of the fire-protection material oversprayed to the underside of the floor should be the same as required for the beam. The panels bear the label of a code-recognized certification organization with a specific reference to the PS 1 or PS 2 standard. Dampers Building codes include requirements for four types of dampers:
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Through-penetration Firestop Systems, XHEZ - UL Product Spec

Hanger wires should be installed vertically unless permitted otherwise in a design. Vertically applied gypsum board is gypsum board that is applied with the long edges parallel to the framing members to which it is attached. Certifications of floor-ceiling and roof-ceiling assemblies and individual beams include restrained and unrestrained ratings. All nonmetallic pipe is intended to be of the solid-core type unless indicated otherwise in the system. Unrestrained Assembly ratings may be used for floor-ceilings and roof-ceilings designed for either restrained or unrestrained conditions. Microelectronic manufacturing plants use a variety of hazardous production materials to which the firestop could be exposed.
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The design process between the architect and electrical engineer may be iterative as there are limits to the total amount of penetrations that can be made or grouped in a rated assembly and there are limits to the configuration of the power system distribution. The tables shown herein should be used as a reference and the code authority should be consulted if discrepancies exist between these tables and a local code requirement. The structural capacity of the wall to be substituted must be equal to or greater than the structural capacity of the beam specified. Common materials for a fire-rated wall type include layers of gypsum board, concrete, or concrete blocks. Precast Concrete Units For firestopping holes with an annulus greater than 3 in.
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