Fixtures And Fittings 61 Openings and Penetrations

Not only must openings in the clean-room walls for doors and vision panels be detailed flush with the adjacent walls, but they must also take account of the following criteria.

The door seal against the doorframe should be flush detailed, utilize recessed sealing strips, and designed to a specified air-leakage rate. Currently one of the only recognised standards for air leakage across doors is BS 476 Part 22. The doorframe components should be minimized with integrated stops or architraves and present a smooth finish with rounded internal and external corners.

All metal frames should have welded joints ground smooth.

Wall vision panels should be flush glazed with any fire rating provided by a supplementary layer of glass within the depth of the wall.

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