SPECIAL REPAIR/REPLACEMENT OF EARTHINGS INFRASTRUCTURE IN TECH AREA AT AF STN GWALIOR

Amount

Material and labour in repair for Maintenance free earthing complete with 85 mm dia of Earth enhancing material (EEM) with cement including 17.2 mm copper coated/bonded (Minimum 200 Micron) MS rod electrode with 65 mmx10mm copper bonded flat on top along with providing required holes as specified to connect the earthing strip, burried directly in ground vertically to a depth not less than 3.00 meter below normal ground level and in not less than 120mm dia hole by drilling through any type of soil by means of mechanical hydraulic boring/drilling machine/Manually. After inserting of main earth electrode in the boring hole, rest space to be filled by the excavated soil. Copper electrode is to be connected with 25 mmx3mm copper strip by means of copper / brass nut bolt of size 8 mm with copper washer near top end of earth electrode to be connected to earth test point made of phosphorous bronze / gun metal of size 75mmx75mmx25mm drill and screwed including 03 no. 8mm dia 25 mm long hexagonal head screws. M & L for PCC 1:3:6 type C-1 using 20mm graded stone aggregate for inspection chamber (earth pit) of size 300mmx300mm internal with 100 mm thick at side i.e. total 500mmx500 mm outer side & 300 mm depth with pre cast RCC 1:2:4 type B-1 using 20mm graded stone aggregate, 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle etc including necessary earth work complete all as specified and directed. Note: (i)The cost of earth lead upto and including 7.5 metre only from the top of earth electrode are deemed to be included under this item and additional earth lead, if any required shall be measured and paid for separately under appropriate item of Sch 'A' (ii) The Earth enhancing material (EEM) shall comply with the specification as mentioned in PS. Relevant test certificate as per EC62561-7 & other standards should be tested at any recognized National Test Laboratories like CPRI,ERDA,ERTL,MSME as approved by GE. The list of tests shall be done as given in the PS. (iii) The earth resistance value shall be recorded in presence of User and Engr-in Charge and the value shall sustain for a period of minimum 10 Years. A Certificate form OEM in this connection shall be submitted by the Contractor.

M&L for soil earth electrical resistivity test by method of measurement with wenner's four electrode method which is outlined in IEEE 80-2000, IEE std 81-1983 and IS : 043 / 1987, Wenner's method. Recommended no. of earthings which are to be connected in grid for obtaining resistance value less than 1 ohm shall be provided with mathematical calculations complete all as specified & directed. Note:-The soil earth electrical resistivity test is to be done by competent agency approved by GE prior to commencement of the work.

Material and labour in repair for earthing complete with galvanized steel earth plate electrode 600mm X 600mm X 6mm buried directly in ground vertically to a depth not less than 2.25 meter below normal ground level (with top edge of earth plate not less than 1.5 meter below ground level) connected to GI strip 32mm x 6mm main earthing lead by means of galvanized bolts, nuts and washers including 50mm GI protection pipe medium grade all as shown in electrical plate no 3 of MES Schedule Part-I, earth lead connected to earth test point & to main switch board etc with & including adequate quantity of charcoal dust and common salt around earth plate, PCC 1:3:6 type C-1 using 20mm graded stone aggregate for earth pit with pre cast RCC 1:2:4 type B-1 using 20mm graded stone aggregate, 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, including GI medium grade watering pipe 25 mm dia with funnel and wire mesh, etc complete all as specified and directed. Note:- (i) The cost of earth lead & its protection pipe upto and including 7.5 metre only from the top of earth electrode are deemed to be included under this item and additional earth lead, if any required shall be measured and paid for separately under appropriate item of Sch A. (ii) Any joint in earthing lead of electrode to test point shall not be allowed/permitted.

Material and labour in repair for earthing complete with copper plate electrode 600mm x 900mm x 5mm thick buried directly in ground vertically to a depth not less than 4.7 meter below normal ground level (with top edge of earth plate not less than 3.6 meter below ground level & complete size of earth pit 1.60m x 1.60m x 0.5m) connected to copper strip 32mm x 6mm as main earthing lead by means of tinned copper / brass bolts, nuts, check nuts and washers besides brazing at all joints all as directed and connected to earth test point all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, including earth test point, made of phosphorous brongze/gun metal of size 75mmx75xmmx25mm dril and screwed including 03 Nos 8mm dia 25mm long hexagonal head screwed, 50mm bore GI pipe medium grade for protection of earth lead from top of the earth plate up to test point complete, adequate quantity of charcoal dust, magnesium sulphate & common salt in alternate layers of 100mm thick all around the plate, under and above the plate and returning, filling of earth spread, levelled, watered and compacted to required level, PCC (1:3:6) type C-1 (using 20mm graded stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast 40mm thick RCC cover of (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate), reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia MS round bar handle, GI medium watering pipe 25mm bore with funnel and wire mesh complete all as specified and directed . NOTE : (i) The cost of earth lead and its protection pipe upto and including 7.5 mtr only from the top of earth electrode are deemed to be included under this item and additional earth lead , if any, required at site shall be measured and paid for separately under appropriate item of Schedule `A’. (ii) Any joint in earth lead from earth electrode to test point shall not be allowed/permitted.

M&L in repair for earthing complete with copper Earth Plate 600mm X 600mm X 3.15mm buried directly in ground vertically to a depth not less than 3.10 meter below normal ground level (with top edge of earth plate not less than 2.10 mtr below ground level), connecting to copper strip 32mm x 6mm main earth lead by means of tinned copper / brass bolts , nuts, check nuts and washers besides brazing at all joints all as directed and connected to earth test point all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, including earth from electrode to test point, made of phosphorous brongze/gun metal of size 75mmx75xmmx25mm drill and screwed including 03 Nos 8mm dia 25mm long hexagonal head screwed, adequate quantity of charcoal dust & common salt in alternate layers of 100mm thick all around the plate, under and above the plate and returning, filling of earth spread levelled, watered and compacted to required level, PCC (1:3:6) type C-1 (using 20mm graded stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast 40mm thick RCC cover of (1:2:4) type B-1 (using 20mm graded stone aggregate), reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia MS round bar handle, GI medium watering pipe 25mm dia with funnel and wire mesh and 50 mm bore GI light grade earth lead protection pipe from earthing plate upto test point complete all as specified and directed . NOTE : (i) The cost of earth lead and its protection pipe upto and including 7.5 mtr only from the top of earth electrode are deemed to be included under this item and additional earth lead , if any, required at site shall be measured and paid for separately under appropriate item of Schedule `A’. (ii) Any joint in earth lead from earth electrode to test point shall not be allowed/permitted.

S&F in repair PVC insulated single core Aluminium conductor cable (un armoured) of size 150 sqmm with saddles and clamp complete all as specified & directed.

S&F in repair PVC insulated single core Copper conductor cable (un armoured) of size 70 sqmm complete all as specified & directed.

S&F epoxy insulator 1100 volt grade including fixing on wall/RCC pillar with fasteners including de-screwing of strip and re-connecting of strip on insulator with suitable screw/nuts/bolts etc complete all as specified and directed

S&F in repair GI funnel with wire mesh for watering the earth pit made to shape and size using PGI sheet minimum 1.0mm thick and fixed in position complete all as specified and directed.

S&F HDPE DWC flexible pipe of Size 40mm external dia & 33 mm internal dia (ISI marked) including required clamps/couplers to be fixed at 1.5 mtr interval on wall to fix the pipe properly and smooth suitable for insulation & protection of GI /copper /aluminium strip of any size by disconnecting & re-connecting after insertion in protection/insulation pipe complete all as specified and directed.

S&F HDPE DWC flexible pipe of Size 50mm external & 38 mm internal dia (ISI marked) including required clamps/couplers to be fixed at 1.5 mtr interval on wall to fix the pipe properly and smooth suitable for insulation & protection of GI /copper /aluminium strip of any size by disconnecting & re-connecting after insertion in protection/insulation pipe complete all as specified and directed.

Excavation in trenches not exceeding 1.5 Mtr wide and not exceeding 1.5 Mtr in depth in soft / loose soil and getting out for removing / laying of pipe lines etc or other works complete all as specified and directed.

Returning and filling including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and directed.

Removal of surplus soil to a distance not exceeding 50 Mtrs and depositing where directed at a level not exceeding 1.5 Mtr above the starting point complete all as specified and directed.

M&L for marker fabricated with 14 gauge MS sheet of size 300mmx180mm rectangular with 20 mm square hollow bar 60 cm long duly painted of colour as directed for writing ER value, date of testing and due date for testing, Earth pit No etc complete all as specified and directed. Note : Required PCC work with sufficient digging to support & fix the marker is included in this item .

M&L for two coats of synthetic enamel paint on earth pit & cover, any description, complete job & colour all as specified and directed.

Demolition/cutting of PCC/Bitumen road for fixing/laying of pipe, any size minimum 200 mm depth & 300mm width and making good with M&L for PCC 1:3:6 (using 20 mm graded stone aggregate) type C-1 complete all as specified and directed.

Labour for repair/maintenance of existing tilted/embedded earth pit by digging not exceeding 3 feet deep around earth pit, filling by nearby soil & re-adjusting the earth pit in proper manner, complete all as specified and directed.

Disconnecting & taking up or down existing unserviceable / deshaped aluminium / GI earth strip or taking down conductors of any size and in any position, stacking properly the serviceable strips for re-use in the work including making good the distrurbed surfaces to match with the existing surfaces complete all as specified and directed.

Supplying, fixing & connecting aluminium earth strip 25 mm x 3mm as in roof conductors / down conductor fixed on walls / roofs with saddles/epoxy insulator including screws required at site complete all as specified and directed.

Fixing only in position & connecting the retrieved old serviceable aluminium/ GI earth strip/ earth lead / down conductors of any description and in any size, after making necessary addition / alterations, fixed on walls / roofs over and including M&L for suitable new insulators (Porcelain/vitreous) provided at a distance not exceeding 50 cm centre to centre and insulators fixed with suitable saddles and screws complete all as specified and directed. Note : Old retrieved earth strip of any shape and size in serviceable condition shall be re-used in the work

Supply and fixing earth continuity conductor or main earthing lead 32x6mm GI strip/earth lead, laid in pipe/fixed on walls or any other position including jointing by GI nuts, bolts and washers at every joint complete all as specified and directed.

Supply and fixing earth continuity conductor or main earthing lead 32mm x 6mm, copper strip/earth lead, laid in pipe/fixed on walls or any other position including jointing by tinned copper/brass nuts, bolts and washers in addition to brazing at every joint complete all as specified and directed.

Supply and fixing earth continuity conductor or main earthing lead 25mm x 3mm, copper strip/earth lead, laid in pipe/fixed on walls or any other position including jointing by tinned copper/brass nuts, bolts and washers in addition to brazing at every joint complete all as specified and directed.

Supply and fixing earth continuity conductor or main earthing lead 25mm x 3mm, Aluminium strip fixed on wall on batten or racess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other position including jointed by Aluminium nuts, bolts and washers complete all as specified and directed.

Supply & fixing in repair light grade, 40mm dia GI tubing with all fittings fixed on walls/ poles/ in trenches as in earth lead protection pipe complete all as specified and directed .

Dismantling & taking up or down GI pipe 40mm bore 1.2/0.6 mtr long including GI socket complete all as specified & directed.

Supply & Fixing GI water tubing, light grade, 40mm bore, 1.2 mtr long duly threaded on one side for fixing socket as in Air termination stand / post at roof top of hangars/bldgs complete all as specified and directed. Note : (i) GI socket & PCC/ brick masonry block for fixing of GI pipe post shall be measured and paid for separately under appropriate item of Schedule `A' (ii) GI pipe 1.2 mtr will be in a single length & no joint will be allowed.

All as per item 28.00 here-in-before but 40 mm bore, 0.6 metre long complete all as specified and directed.

Fixing only GI pipe, 40mm bore, 1.2 mtr long obtained from taking down in serviceable condition as in Air termination stand / post at roof top of hangers/bldgs complete all as specified and directed. Note : (i) Old GI pipe obtained in serviceable condition shall be re-used in the work (ii) GI socket & PCC / brick masonry block for fixing of GI pipe post shall be measured and paid for separately under appropriate item of Sch`A'.

All as per item 30.00 here-in-before but 40mm bore, 0.6 metre long complete all as specified and directed.

Dismantling & taking up or down GI pipe 50mm bore 1.2 /0.6 mtr long including GI reducer (50mm x 40mm) complete all as specified & directed.

Material & labour for GI water tubing, light grade, 50mm bore, 1.2 mtr long duly threaded on one side for fixing socket as in Air termination stand / post at roof top of hangers/bldgs complete all as specified and directed. Note : (i) GI socket & PCC/ brick masonry block for fixing of GI pipe post shall be measured and paid for separately under appropriate item of Sch 'A’. (ii) GI pipe 1.2 mtr will be in a single length & no joint will be allowed.

Supply & fixing GI water tubing, light grade, 50mm bore, 0.6 mtr long duly threaded on one side for fixing socket as in Air termination stand / post at roof top of hangers/bldgs compete all as specified and directed. Note : (i) GI socket & PCC/ brick masonry block for fixing of GI pipe post shall be measured and paid for separately under appropriate item of Sch `A'. (ii) GI pipe 0.6 mtr will be in a single length & no joint will be allowed.

Fixing only GI pipe, 50 mm bore, 1.2 mtr long obtained from taking down in serviceable condition as in Air termination stand / post at roof top of hangers/bldgs complete all as specified and directed. Note : (i) Old GI pipe obtained in serviceable condition shall be re-used in the work (ii) GI socket & PCC / brick masonry block for fixing of GI pipe post shall be measured and paid for separately under appropriate item of Schedule `A'

All as per item 35.00 here-in-before but 0.6 metre long complete all as specified and directed.

M&L in repair for providing test point terminal block made out of Gun metal or phosphorous bronze of size 75 mmx75 mm x25 mm drilled and screwed including 03 nos 8 mm dia 25 mm long hexagonal head screws complete all as specified and directed.

Taking up or down GI socket 40mm / reducer socket 50x 40mm bore including aluminium gutaka complete all as specified & directed.

Fixing only GI socket 40mm bore, on vertical pipe post / stand complete all as specified and directed. Note : Old retrieved GI socket obtained in serviceable condition shall be re-used in the work.

Supply & fixing GI socket 40mm bore, on vertical pipe post / stand complete all as specified and directed.

Supply & fixing GI reducer (50mm x 40mm bore), on vertical post / stand complete all as specified & directed.

Fixing only GI reducer (50mm x 40mm, bore), on vertical post / stand complete all as specified and directed. Note : Old GI reducer obtained in serviceable condition shall be re-used in the work.

Supply & fixing aluminium gutka 40mm dia having internal thread of 12mm dia and external thread of 40mm dia and fixed on GI socket complete all as specified and directed.

Fixing only aluminium gutka on GI socket complete all as specified and directed. Note:- Old gutka obtained in serviceable condition shall be re-used in the work.

Dismantling & taking up or down existing unserviceable aluminium air termination rod, 12mm dia, 1200mm / 300 mm long with existing aluminium block from vertical pipe supports of any description complete all as specified and directed

Supply and fixing aluminium Air termination rod single pointed at top and properly threaded at bottom end, 12mm dia and 1200 mm long complete all as specified and directed.

Supply and fixing aluminium Air termination rod single pointed at top and properly threaded at bottom end, 12mm dia and 300 mm long complete all as specified and directed.

Fixing only aluminium Air termination rod single pointed, 12 mm dia 1200mm/300mm long complete all as specified & directed. Note : Old air termination rod obtained in serviceable condition shall be re-used in the work.

M&L for PCC 1:2:4 for block, type B-1 using 20mm graded stone aggregate for block size 150 mm x 100mm X 150mm, set in Cement Mortar 1:4, with and including necessary form work and all exposed surfaces finished even and smooth without using extra cement including removal of old broken unserviceable PCC block at site complete all as specified & directed. Note : An epoxy insulator shall be fixed on the PCC block with and including the help of rawal plug & screw to support and fixing the down conductors / earth strips.

M&L in repair for PCC 1:2:4 for & around lightening conductor pipe on roof of building, type B-1 using 20mm graded stone aggregate of size 350mm x 350mm X 350mm, set in Cement Mortar 1:4, with and including necessary formwork and all exposed surfaces finished even and smooth without using extra cement including removal of old broken unserviceable PCC / block at site complete all as specified & directed. Note : (i) Contractor is responsible to arrange his own T&P for carrying the PCC material on roof of any building/Hangar.

M&L in repair for earth pit of internal size 300mmx300mmx300mm with wall thickness 100mm casting at site with and including PCC base 500X 500X100mm made of PCC (1:3:6) type C-1 (using 20mm graded stone aggregate) with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast 40mm thick RCC cover of (1:2:4) type B-1 (using 20mm graded stone aggregate), reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia MS round bar handle etc. including removal of old broken unserviceable earth pit from site complete all as specified & directed.

M&L in repair for earth pit cover, pre-cast RCC (1:2:4) type B-1 using 20mm graded stone aggregate, 320mm x 320mm x 40mm thick, cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia MS round bar handle with and including necessary formwork complete all as specified & directed. Note for item ser no (1 to 52) : These works can also be done on roof of any hanger, therefore contractor is advised to quoted the rate accordingly & contractor is responsible to arrange its own T&P

RAVINDRA SALES

Bharat Sales Corporation

Achal Construction

Allied Agencies

M/s Sagar Construction