2021-414-E-AMS-Riggs-Harrod Builders, Inc-SHSC Roof & HVAC Replacement

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SHSC HVAC and Roof Replacement Smith Sinnett / 2020072 Orange County, North Carolina FIELD ENGINEERING 01 71 23 - 2 B. Do not change or relocate benchmarks or control points without prior written approval. Promptly report lost or destroyed reference points or requirements to relocate reference points because of necessary changes in grades or locations. C. Promptly replace lost or destroyed Project control points. Base replacements on the original survey control points. Establish and maintain a minimum of 2 permanent benchmarks on the site, referenced to data established by survey control points. Record benchmark locations, with horizontal and vertical data, on Project Record Documents. D. Existing Underground Utilities and Equipment: The existence and location of underground and other utilities and construction indicated as existing are not guaranteed. Before beginning site work, investigate and verify the existence and location of underground utilities and other construction. Prime Contractor and all subcontractors shall field locate all underground services whether shown on drawings or not, including, but not limited to the following: utilities, underground wires, fiber optic lines, cables, conduits, and pipes, prior to initiating any excavation on any area of the proposed site. Provide and pay for underground utility locator service, metal detectors and hand digging as necessary to satisfy above requirement. Provide drawing prior to commencing work signed by the locator service that delineates the underground services. Locator service shall field locate all services with high visibility paint. Maintain ground markings during the course of work and stay clear of underground service until work that may damage underground services is complete. Prime Contractor (s) and their subcontractors shall be responsible for utility services damaged during construction and shall repair at their own expense any utility services damaged by their work. Repair within 24 hours or less. E. Prior to construction, verify the location and invert elevation at points of connection of sanitary sewer, storm sewer, and water-service piping. 3.2 PREFORMANCE A. Work from lines and levels established by the property survey. Establish benchmarks and markers to set lines and levels at each story of construction and elsewhere as needed to locate each element of the Project. Calculate and measure required dimensions within indicated or recognized tolerances. Do not scale Drawings to determine dimensions. Advise entities engaged in construction activities of marked lines and levels provided for their use. As construction proceeds, check every major element for line, level, and plumb. B. Surveyor's Log: Maintain a surveyor's log of control and other survey work. Make this log available for reference. Record deviations from required lines and levels, and advise the Architect when deviations that exceed indicated or recognized tolerances are detected. On Project Record Drawings, record deviations that are accepted and not corrected. On completion of foundation walls, major site improvements, and other work requiring field-engineering services, prepare a certified survey showing dimensions, locations, angles, and elevations of construction and site work. C. Site Improvements: Locate and lay out site improvements, including pavements, stakes for grading, fill and topsoil placement, utility slopes, and invert elevations. D. Building Lines and Levels: Locate and lay out batter boards for structures, building foundations, column grids and locations, floor levels, and control lines and levels required for mechanical and electrical work. E. Existing Utilities: Furnish information necessary to adjust, move, or relocate existing structures, utility poles, lines, services, or other appurtenances located in or affected by construction. Coordinate with local authorities having jurisdiction. END OF SECTION 01 71 23 DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6