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<br />221423.4 – ROOF DRAINS <br /> <br />Project Manual for Whitted Building Roof Replacement <br />Orange County, Hillsborough, NC <br />Prepared by Atlas Engineering, Inc., 551-A Pylon Drive – Raleigh, NC 27606 <br />May 2022 <br /> <br />D. All ceilings and walls breached as a result of installing new drains and piping shall be repaired with <br />like materials. Maintain current 2-hour firewall standards and rated penetration UL fire. See UL <br />System No. W-L-3082 for wall assembly and penetration.. <br /> <br />E. New interior pipe shall be insulated. <br /> <br />F. At locations where piping is designated to breach exterior walls, provide appropriate sleeves and fittings. <br /> <br /> <br /> <br />END OF SECTION 221423 <br />DocuSign Envelope ID: 89558C18-938A-4BFF-B14A-A2214E8AA5DD