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275.2.6 During installation of air terminations and down conductors, the following items shall be taken intoconsideration.i) The mechanical forces produced in case of lightning stroke.ii)External local heating.iii)The Consultantural or aesthetic beauty of the building.iv)Services entering the structure above and below groundv) Radio and television receiver aerials.vi)Flag masts and roof level plant rooms.5.3 Joints and bonds:5.3.1 Joints: It shall he ensured (hat the joints are avoided in the lightning protection system as far as possible.In case joints becomes necessary, the number of joints shall be kept as minimum as possible and theyshall be mechanically and electrically effective. The joints shall be bolted, crimped, riveted or welded. Incase of over lapping joints the length of the overlap shall not be less than 20mm. in the down conductorbelow ground level, there shall not be any joint.5.3.2 Bonds: The bond to the lightning protection system shall have a cross sectional area not less than thatemployed for the main conductors. All bonds shall be suitably projected against corrosion and shall be asshort as possible.5.4 Testing points:Each down conductor shall be provided with a testing point at a height of 1.5M from the ground level. Itshall be ensured that there is no connection other than the direct connection to the earth electrode is madebelow a testing point. The details of the test links are shown in the drawing.5.5 Earth terminations:Each down conductor shall have an independent earth termination and have provision for isolation fortesting purpose. Water pipe system shall not be bonded to the earth termination system. However ifadequate clearance between the two cannot be obtained, they may be effectively bonded and the bondsshall be capable of isolation and testing. The gas pipes however shall in no case be bonded to the earthtermination.5.6 Earth electrodes:5.6.1 Earth electrodes shall consist of pipe, strips or plates. Metal sheaths of cables shall not be used as earthelectrodes. The earth electrode shall be constructed as per IS: 30435.6.2 When pipes are used they shall be driven into the ground as close as practicable but outside thecircumference of the structure.5.6.3 When strips are used, they shall be buried at a depth not less than 0.5 m deep. The strips shall be laidradially in two or more directions from the point of connection to a down conductor. If this is not possiblethey shall be laid in one direction. If the space restriction -requires the strips to be laid in parallel or ongrid formation, the distance between two strips shall not be less than 2m.5.6.4 When plate electrodes are used they shall be buried in the ground so that the top edge of the plate is at adepth not less than 2.5m from the surface of the ground. If two plate electrodes are to be used in parallel,the distance between two shall not be less than 8m.5.7 FastnersThe conductors used for lightning protection shall be securely attached to the building or other object tobe protected through fasteners made of galvanized steel. The fasteners shall be substantial in constructionnot subjected to breakage and protected against corrosion. Guidelines given in page 24 IS 2309-1969 shallbe referred.
286. Testing:On the completion of the installation of lightning protection system the following tests shall he carriedout.i) Continuity testThe continuity of all conductors and the efficiency of all bonds and joints shall be checked.ii)Resistance tests:The resistance of the lightning protection system completes with air terminations but without the earthconnection shall be measured and its value shall not exceed 1 ohms.iii)Earth resistance test:The earth resistance shall be measured and it should not exceed 10 ohms.
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0GAIL (India) Limited(A Nav Ratna C
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2S.NO.TECHNICAL SPECIFICATIONSINDEX
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41.1 GENERAL:A. GENERAL INFORMATION
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6SPECIFICATIONS1. SPECIFICATIONS FO
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81.8 DE-WATERINGWork for excavation
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102.9 TREATEMENT OF SOIL ALONG EXTE
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123.3 PLANT AND EQUIPMENTThe contra
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143.6.3 WATERWater used in the work
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16Unless otherwise specified in the
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183.13 DurabilityThe durability of
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203.18.5 Accuracy of BatchingThe ac
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22placement of concrete, the surfac
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24ii)iii)In framing the beam at dif
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262. Test for organic impurities.3.
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28The minimum interval between the
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303.30.3 Limitation to Use of Diffe
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32The joint filler shall be easily
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341 kg 1 No. 100 gms 1 No.3. Slump
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36It shall be ensured that the bars
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385.1.2 RELATED WORK SPECIFIED ELSE
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40Oiling shall be done before reinf
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42For fair faced concrete, the posi
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446.3 RUBBLE MASONRY:-6.3.1. MATERI
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467.1.1.2 Hard Wood:Hard wood shall
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48The glass sheets for glazing shal
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50finish with minimum anodic film t
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52The tiles shall generally conform
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54Plaster as herein specified shall
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5612.9.5 FLOATING COAT OF NEAT CEME
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5813.1.a3 Preparation of Surface:Th
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6014.1.2 Preparation of surface:Pre
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62solution generously with brush. A
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64The Gypsum boards used for false
Page 67 and 68: 661.4.1 Straining posts shall be pr
Page 69 and 70: 687 Aluminum glazing section Hindal
Page 71 and 72: 70SPECIFICATIONSPLUMBING AND SANITA
Page 73 and 74: 722.6 For all pipes, work shall be
Page 75 and 76: 743.6 As far as possible no GI pipe
Page 77 and 78: 76Following measures shall be adopt
Page 79 and 80: 781.15 ANGLE VALVEAngle valve shall
Page 81 and 82: 803.16 Cast iron gratings shall be
Page 83 and 84: 82a) The contractor shall at all ti
Page 85 and 86: 844.5.1 LEADING IN C.I. PIPESThe le
Page 87 and 88: 865.2.4 TRENCH FILLING OF G.I. PIPE
Page 89 and 90: 88e) Location of all manholes, catc
Page 91 and 92: 90Sr.No. MATERIALS APPROVED MAKE/AG
Page 93 and 94: 2TECHNICAL CONDITIONS1.1 These spec
Page 95 and 96: 411. Qualified Competent Supervisio
Page 97 and 98: 6Ceiling rose: a) A ceiling rose or
Page 99 and 100: 8The consuming device circuit shall
Page 101 and 102: 10A cover plate at the top of the v
Page 103 and 104: 12Mechanical operation indicators s
Page 105 and 106: 1411. Indicating lamps and push but
Page 107 and 108: 16CHAPTER 31. Scope:LAYING OF CABLE
Page 109 and 110: 183.5.4 Provision shall be made to
Page 111 and 112: 20such that it shall be able to rea
Page 113 and 114: 22ii) Tappings : OFF load tap chang
Page 115 and 116: 245.3.2 Installation: The transform
Page 117: 26A vertical air termination shall
Page 121 and 122: 30l. Light Switches/Sockets/Fan Reg
Page 123 and 124: 2TECHNICAL SPECIFICATIONSA) AIR COO
Page 125 and 126: 47.0 CONEENSATE & DRAIN PIPING:7.1
Page 127 and 128: 6B) AIR DISTRIBUTION SYSTEM:1.0 GEN
Page 129 and 130: 8ii.iii.iv.All necessary allowances
Page 131 and 132: 10ACTUATOR:In case of motorised smo
Page 133 and 134: 12D) THERMAL/ACOUSTIC INSULATION. G
Page 135 and 136: 14BASIS OF DESIGNAC REQUIRED FOROFF
Page 137 and 138: 162.0 INSULATIONManufacturer Materi
Page 139 and 140: 0G) LIST OF APPROVED MAKES:The foll
Page 141 and 142: 1IV. TECHNICAL SPECIFICATIONSFORINT
Page 143 and 144: 316. Unless otherwise provided spec
Page 145 and 146: 52.9 ROUGH CARPENTRYMaterialAll fra
Page 147 and 148: 7All joinery to be varnished/spirit
Page 149 and 150: 9b) After the first coat has fully
Page 151 and 152: 11b) The Contractor should furnish
Page 153: 13holes, loose or dead knots or oth
Page 156 and 157: 2S.N. MATERIAL TEST FIELD/LABORATOR
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Page 167 and 168: 1VI. LIST OF DOCUMENTS/REGISTERS TO
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The following are the tentative qua
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S.No DESCRIPTION OF WORK UNIT QTYPr
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S.No DESCRIPTION OF WORK UNIT QTY12
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CONNECTING CORRIDORS.No DESCRIPTION
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