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Window opening control devices on <br />windows serving as a required <br />emergency escape and rescue opening <br />shall comply with ASTM F2090 <br />See Engineering <br />800 CFM Hood <br />Provide fire blocking vertically at ceilings <br />and floors, and horizontally at intervals <br />not exceeding 10'. <br />Screens cannot be replaced with <br />windows at any time without <br />engineering and an additional <br />permit.