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FOUNDATION DESIGN AND INSTALLATION CHAPTER 2: SITE DESIGN AND DEVELOPMENT • A soils engineer shall determine if the onsite excavated materials are adequate or suitable for use as backfill material. If the material is not suitable, then engineered soils shall be determined by the soils engineer. • Foundation backfill shall be placed in layers no more than 305 mm (12 in.) deep before compaction. The backfill requirements of each site differ based on conditions at the site. • A foundation for a cabinet shall be level and sealed. 2.10.3 CONCRETE AND SOILS INSTALLATION MONITORING Test requirements for different types of concrete foundations are provided in Table 2-1. TABLE 2-1 FOUNDATION AND SOILS MONITORING REQUIREMENTS Requirement Type of Foundation Drilled Piers (Caissons) Deep Mat Guy Tower Sites Confirm and obtain concrete mix design from foundation designer. X X X X Perform penetrometer test at the base of the mat or tower excavation to verify soil bearing conditions. The number of test locations is dependent on soil conditions. The Geotechnical firm shall provide bearing values for specific locations. NOTE: Penetrometer tests are not required at the bottom of guy anchor thrust block excavations. Collect bulk sample for Modified Proctor compaction testing. Expedite sample to lab to accommodate a 7-day concrete cure period (unless a high early type mix is used) then a shorter turnaround is required. Identify specific caisson(s) being installed and include in daily field log and concrete report. Confirm and note caisson diameter and depth in concrete report. X Confirm, note and ensure caisson bottom is clean and free of debris. X For caissons, confirm and note placement of reinforcement cage and ensure it is centered in caisson pier. For other foundations, confirm and note placement of reinforcement steel with respect to foundation design. Confirm and note that method of concrete placement is as specified by foundation designer(s). X minimum 3 to 5 locations X minimum 2 to 3 locations Eqpt. Shelter Foundations X minimum 2 to 4 locations X X X 2-14 68P81089E50-B 9/1/05 X X X X X X X X X
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES FOUNDATION DESIGN AND INSTALLATION TABLE 2-1 FOUNDATION AND SOILS MONITORING REQUIREMENTS (CONTINUED) Requirement Type of Foundation Perform concrete field tests (slump, temperature and air content) and cast a minimum of one set of test cylinders (four cylinders per set) for every 19.1 m3 (25 cu. yd.) of concrete placed. Perform new set of tests and cylinders once five yards beyond the 19.1 m3 (25 cu. yd.) increment. Examples: 61 m3 (80 cu. yd.) = four sets of test cylinders. 23 m 3 (30 cu. yd.) = two sets of cylinders). Confirm and note that a working vibratory wand is used to consolidate the upper 3 m (10 ft.) of concrete placed in each caisson or the tower mat foundation. Ensure that newly formed test cylinders are placed in an insulated cure box or other heated area to protect against freezing temperatures. Note that other methods of curing may be more acceptable or desired. Test concrete cylinders in accordance with latest version of American Concrete Institute (or authority having jurisdiction) standards and note in concrete test log. Note unusual developments such as rejected concrete, weather or construction delays, difficulty in setting anchor bolts, or casings stuck in place. Perform, confirm and note density tests on each new lift of tower foundation backfill to verify it is compacted to 95% of the Modified Proctor maximum density value test (ASTM D1557). Note the type of compacting equipment used. Specifically note the anchors or locations worked on and the order in which they were poured. Ensure backfill and undercut areas for non-structural applications (such as around pre-fabricated shelter foundations) are compacted to 90% of the maximum dry density value determined by the latest version of Standard Proctor test (ASTM D698). Drilled Piers (Caissons) Deep Mat Guy Tower Sites X X X X X X X X X X X X X X X X X X X X X X X X 68P81089E50-B 9/1/05 2-15 X Eqpt. Shelter Foundations X
Page 1 and 2: © 2005 MOTOROLA, INC. ALL RIGHTS R
Page 3 and 4: TABLE OF CONTENTS Chapter 1. Introd
Page 5 and 6: STANDARDS AND GUIDELINES FOR COMMUN
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STANDARDS AND GUIDELINES FOR COMMUN
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CHAPTER 5 INTERNAL GROUNDING (EARTH
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CHAPTER 6 POWER SOURCES 6 6.1 LOCKO
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CHAPTER 7 SURGE PROTECTIVE DEVICES
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CHAPTER 8 MINIMIZING SITE INTERFERE
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CHAPTER 9 EQUIPMENT INSTALLATION 9
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APPENDIX A ELECTROMAGNETIC ENERGY I
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APPENDIX B SOIL RESISTIVITY MEASURE
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APPENDIX C PROTECTING AGAINST ELECT
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APPENDIX D GROUNDING (EARTHING) ELE
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APPENDIX E GENERAL CONVERSIONS AND
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APPENDIX F R56 COMPLIANCE CHECKLIST
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I NDEX Index Index AC power cabling
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