Align rcc-3cx manual

Rocks larger than 10cm in any direction shall not be placed in embankment adjacent to structures. The upper surface of the embankment shall be shaped so as to provide complete drainage of surface water at all times. Compaction 3. All compacted sand filling shall be confined as far as possible. At all times unfinished construction shall have adequate drainage. Upon completion of the roads surface course. Adjacent shoulders shall be given a final shaping, true alignment and grade.

Each layer of earth embankment when compacted shall be as close to optimum moisture content as practicable. Embankment material which does not contain sufficient moisture to obtain proper compaction shall be wetted. If the material contains any excess moisture, then it shall be allowed to dry before rolling.

The rolling shall begin at the edges overlapping half the width of the roller each time and progress to the center of the road or towards the building as applicable.

Rolling will also be required on rock fills. No compaction shall be carried out in rainy weather. Requirement for fill material under foundation The thickness of fill material under the foundations shall be such that the maximum pressure from the footing, transferred through the fill material and distributed onto the original undisturbed soil will not exceed the allowable soil bearing pressure of the original undisturbed soil.

For expansive soils the fill materials and other protections etc. Page 2. Stone spreading shall be done in the Outdoor Sub-Station area, Power Transformer, Capacitor Bank and wherever equipments and or structures are to be provided under present scope of work.

Hardness, Flakiness shall be as required for wearing courses are given below: Sieve Analysis Gradation. One test shall be conducted for every 50 Cum. De-weeding including removal of roots shall be done before rolling is commenced. Engineer-in-Charge shall decide final formation level so as to ensure that the site appears uniform free from undulations.

The final formation level shall however be very close to the formation level using manual or machine roller with suitable water sprinkling arrangement to form a smooth and compact surface.

All works up to floor V level 80 mm thick. Over the base layer of site surfacing material, a final surface course of minimum 50 mm thickness of 20 mm nominal size single size ungraded broken stone as specified above shall be spread and compacted. The water shall be sprinkled in such a way that bulking does not take place.

Before taking up the above mentioned treatment 4. The recommendation of local agriculture or horticulture department shall be sought wherever feasible while choosing the type of chemical to be used. Nevertheless the effectiveness of the chemical shall be demonstrated by the contractor in a test area of 10M x 10M approx.

The final approval shall be given by Engineer-in-Charge and final approval given based in the results. The antiweed chemical shall be procured from reputed manufacturers. The dosage and application of chemical shall be strictly followed. The contractor shall be required to maintain the area free of weeds for a period of 1 year from the date of application of 1st dose of antiweed chemicals.

The Contractor shall design the storm water drainage system. On the basis of maximum rainfall intensity of culverts, ditches, drains etc. The surface of the site shall be sloped to prevent the ponding of water. Outfall of drainage shall be suitably selected. The maximum velocity for pipe drains and open drains shall be limited to 2. However, minimum non-silting velocity of 0. Longitudinal bed slope not milder than 1 in shall be provided. The Contractor shall ensure that water drains are away from the site area and shall prevent damage to adjacent property by this water.

Adequate protection shall be given to site surfaces, roads, ditches, culverts, etc. However, for road crossings etc. For rail crossings, pipes conforming to railway loading standards or at least NP4 class shall be provided. Manholes shall be provided at every 30m interval, at connection points and at every change of alignment.

Open surface drains shall be provided with Cement Concrete of minimum thickness of mm or more as per design condition. Pipe drains shall be connected through manholes at an interval of max.

Effluents shall be suitably treated by the Contractor to meet all the prevalent statutory requirements and local pollution control norms and treated effluents shall be conveyed to the storm water drainage system at a suitable location for its final disposal. Invert of the drainage system shall be decided in such a way that the water can easily be discharged above the High Flood Level HFL outside substation boundary at suitable location beyond boundary wall of substation or actual whichever occurs earlier and approved by Owner.

The Contractor shall connect drain s at one or more points to outfall points as feasible at site. Layout of the roads shall be based on Layout drawing for the substation. Parking areas shall be provided for Site personnel and visitors as per layout drawing. Adequate turning space for vehicles shall be provided and bend radius shall be set accordingly. It has to be connected suitably with roads. All substation roads be constructed so as to permit transportation of all heavy equipment upto 50MT.

Road Standard shall be as per IRC standard. Adequate provision shall be made for road drainage. All roads shall be designed for class 'E' of traffic as per IRC Guidelines for the design of flexible pavements. The cable trench wall shall be designed for the following loads. Necessary sumps be constructed and sump pumps if necessary shall be supplied.

Cable trenches shall not be used as storm water drains. The top of trenches shall be kept at least mm above the finished ground level. The top of cable trench shall be such that the surface rain water does not enter the trench. All metal parts inside the trench shall be connected to the earthing system. The trench bed shall have a perpendicular to the run. Trench wall shall not foul with the foundation.

Suitable clear gap shall be provided. This clause is as well applicable to the other RCC constructions. It may also be noted by the contractor that all existing equipment foundations in the outdoor area shall be dismantled by him. Concrete shall conform to the requirements mentioned in IS: and all the tests shall be conducted as per relevant Indian Standard Codes as mentioned in Standard field quality plan appended with the specification.

If the site is sloppy, the foundation height will be adjusted to maintain the exact level of the top of structures to compensate such slopes. Minimum 75mm thick lean concrete shall be provided below all underground structures, foundations, trenches etc. Concrete made with Portland slag cement shall be carefully cured and special importance shall be given during the placing of concrete and removal of shuttering.

The design and detailing of foundations shall be done based on the approved soil data and sub-soil conditions as well as for all possible critical loads and the combinations thereof. Only RCC piles shall be provided. Suitability of the adopted pile foundations shall be justified by way of full design calculations.

Necessary initial load test shall also be carried out by the bidder at their cost to establish the piles design capacity. Only after the design capacities of piles have been established, the Contractor shall take up the job of piling. Routine tests for the piles shall also be conducted. The contractor shall go for vertical load testing or lateral load testing.

The contractor may choose static or dynamic load testing upon site condition and time constraint. Design 8. The design and construction of RCC structures shall be carried out as per IS and minimum grade of concrete shall be M Limit state method of design shall be adopted unless specified otherwise in the specification. For detailing of reinforcement IS: and SP: 16 shall be followed.

Cold twisted deformed bars conforming to IS: shall be used as reinforcement. However, in specific areas mild steel Grade I conforming to IS can also be used. Clear cover to reinforcement towards the earth face shall be minimum 40 mm. RCC water retaining structures like storage tanks, etc. However, water channels shall be designed as cracked section with limited steel stresses as per IS: Part I to IV by working stress method.

Design shall consider any sub-soil water pressure that may be encountered following relevant standard strictly. Necessary protection to the foundation work. If required shall be provided to take care of any special requirements for aggressive alkaline soil.

RCC columns shall be provided with rigid connection at the base. All sub-structures shall be checked for sliding and overturning stability during both construction and operating conditions for various combinations of loads.

Factors of safety for these cases shall be taken as mentioned in relevant IS Codes as stipulated elsewhere in the Specifications, For checking against overturning. Co-efficient of active or passive earth pressure whichever is applicable. However, for the design of substructures of any underground enclosures, earth pressure at rest shall be considered. Minimum factor of safety of Page 2. Minimum factor of safety of 1. Intermediate dividing piers of such enclosures shall be designed considering water in one pump sump only and the other pumps sump being empty for maintenance.

Minimum reinforcement shall be governed by IS: and IS: The same factors shall be used as partial safety factor over loads in limit state design also. When more than one admixture is to be used, each admixture shall be batched in its own batch and added to the mixing water separately before discharging into the mixer. Admixtures shall be delivered in suitably labeled containers to enable identification.

Admixtures in concrete shall conform to IS: The waterproofing cement additives shall conform to IS: The contractor may propose and the Owner may improve the use of a water-reducing set-retarding admixture in some of the concrete.

The use of such an admixture will not be approved to overcome problems associated with inadequate concrete plant capacity or improperly planned placing operation sand shall only be approved as an aid to overcoming unusual circumstances and placing conditions. The water-reducing set-retarding admixture shall be an approved brand of Lignosulphonate type admixture.

Areas and Requiring Fencing Fencing shall be providing for the following areas: 9. Capacitor bank cage, which shall be part of the capacitor bank supply. Fencing of Aux.

Substation Transformer. Product Material The minimum requirements are as follows: 9. Pipe medium duty : 12mm. Plate with 4 Nos of hole. All structural steel shall confirm to IS: and shall be painted with a coat of approved steel primer and two coats of Aluminum Paint. The IRC weld mesh Panels shall be fixed to the post at the top and bottom of the 50mm dia,.

Pipe by Nuts and bolts. The Intermediate straining Posts to be Page 2. All structural steel shall confirm to IS: and shall be painted with a coat of approved steel primer and two coats of synthetic enamel paint. Installation 9. Post holes shall be excavated by approved methods.

Intermediate posts shall be spaced 2. Posts shall be set in plain cement concrete blocks of minimum dimension mm x mm x mm deep Concrete work shall conform to relevant clause. Post shall be braced and held in plumb position and true alignment and elevation until concrete has set.

Fence fabric shall not be installed until concrete has cured a minimum of 7 days. Bottom and top of the fence fabric shall be fixed with MS flats of 50 mm x. Toe wall of Brick masonry, with notches over 75 mm thick PCC shall be provided below all fencing and shall be minimum mm above and mm below finished ground level. All exposed surfaces of brick toe wall shall be provided with cement sand plaster and coated with two coats of Acrylic Smooth exterior paint with a base coat of approved cement primer.

The gates shall be fabricated with welded joints to achieve rigid connections. The gate frames shall be painted with one coat of approved steel primmer and two coats of synthetic enamel paint.

Gates shall be fitted with approved quality iron hinges, latch and latch catch. Latch and latch catch shall be suitable for attachment and operation of pad lock from either side of gates. Hinges shall permit gates to swing through degree back against fence.

Gates shall be fitted with galvanized chain hook or gate hold back to hold gates open. Double gates shall be fitted with centre rest and drop bolt to secure gates in closed position. Gates shall be installed in locations shown on drawings. Next to the main gate, a men gate 1. With a wicked gate. Bottom of gates shall be set approximately 40mm above ground surface and necessary guiding mechanism shall be fitted. An open space of 1 m minimum shall be provided on the periphery of the rows of panel and equipment generally in order to allow easy operator movement and access as well as maintenance.

Future extension of one floor shall be considered at the time of design. Any other possibility of annex building shall be taken care of while finalising the layout of the control room building.

The design of control room building shall be such decided thats minimum one floor can be added in future. To the requirements of the National Building Code of India and the standards quoted therein. The contractor shall also arrange approval of Page 2. The official fees shall be born by BRPL.

To adequately suit the requirements of the equipment and apparatus contained in the buildings and in all respects to be compatible with the intended use and occupancy. With a functional and economical space arrangement. To be aesthetically pleasing. Different buildings shall show a uniformity and consistency in architectural design.

To allow for easy access to equipment and maintenance of the equipment. With, wherever required, fire retarding materials for walls, ceilings and doors, which would prevent supporting or spreading of fire. With materials preventing dust accumulation. Equipment loads shall constitute, if applicable, all load of equipments to be supported on the building frame The wind loads shall be computed as per IS , Seismic Coefficient method shall be used for the seismic analysis as per IS with importance factor 1.

The average maximum annual variation in temperature for the purpose shall be taken as the difference between the mean of the daily minimum temperature during the coldest month of the year and mean of daily maximum temperature during the hottest month of the year.

Wind and Seismic forces shall not be considered to act simultaneously. Floors shall be designed for live loads as per relevant American standards. Cable and piping loads, shall also be considered additionally for floors where these loads are expected.

In addition, beams shall be designed for any incidental point loads to be applied at any point along the beams, the floor loads shall be subject to Owners approval. For consideration of loads on structures IS: , the following minimum superimposed live loads shall however be considered for the design.

Design criteria shall comprise the codes and standards used. Applicable climatic data including wind loads, earthquake factors maximum and minimum temperatures applicable to the building locations, assumptions of dead and live loads, including equipment loads, impact factors.

Fully, dimensioned concept plan including floor plans, cross sections, longitudinal sections, elevations and perspective view of each building. These drawings shall be drawn at a scale not smaller than I : 50 and shall identify the major building components. Fully dimensioned drawings showing details and sections drawn to scales of sufficient size to clearly show sizes and configuration of the building components and the relationship between them.

Product information of building components and materials, including walls partitions flooring ceiling, roofing, door and windows and building finishes. A detailed schedule of building finishes including colour schemes. Approval of the above information shall be obtained before ordering materials or starting fabrication or construction as applicable. All walls shall be non-load bearing walls. The ceiling shall have 6mm thick cement sand plaster Suitable pigment shall be added to render the surface aesthetically pleasing as per directions of Engineer-in-charge.

The slots shall have 14 GG. The net shall be stretched tightly across the slotted angles or slotted plates holding it in place by means of wires.

The joints of the wire netting shall be butted and tightly laced down with 14G G. The system shall be got approved Rolling steel shutters and rolling shutters grills shall be provided as per layout and requirement of buildings.

Paints used in the work shall be of best quality specified in CPWD specification. The Contractor shall arrange for all necessary formalities to be met in regard to inspection, testing, obtaining approval and giving notices etc.

Minimum 2 Nos. All sanitary fixtures and fittings shall be of approved quality and type manufactured by well known manufacturers. All items brought to site must bear identification marks of the type of the Manufacturer.

Heavy-duty cast iron pipes shall be used otherwise. This water shall be collected in junction boxes and these boxes shall drain to the main drainage system of the station.

Cast Iron rain water down comers conforming to IS with water tight lead joints shall be provided to drain off the rain water from the roof. These shall be suitably concealed with masonry work of cement concrete or cladding material.

The number and size of down comers shall be governed by IS and IS All drains inside the buildings shall have minimum 40 mm thick grating covers and in areas where heavy equipment loads would be coming, precast RCC covers shall be provided in place of steel grating.

For all buildings, suitable arrangement for draining out water collected from equipment blow down, leakages, floor washings fire fighting etc. However, kicker type externally placed PVC water stops shall be used for the base slab and in other areas where it is required to facilitate concreting.

The minimum thickness of PVC water stops shall be 5 mm and minimum width shall be mm. Galvanizing shall be checked and tested in accordance with IS The galvanizing shall be followed by the application of an etching primer and dipping in black bitumen in accordance with BS A sliding layer of bitumen paper or craft paper shall be provided over the screed layer to destroy the bond between the screed and the base slab concrete of the water retaining structures.

Projection of sunshade from the wall shall be minimum mm over window openings and mm over door openings. Service ladder shall be provided for access to all roofs. RCC fire escape staircase shall be provided in control buildings. All handrails and ladder pipes shall be 32 mm nominal bore MS pipes medium class and shall be galvanised mediumclass as per IS All rungs for ladder shall also be galvanised as per IS: medium class.

He shall plan all such activities in advance and execute in such a manner that interfacing activities do not become bottlenecks and dismantling, breakage etc. Contractor shall state the total water requirement both in terms of quantity and head to the Owner. Although contractor shall provide a underground water reservoir inside a room, near the gate of minimum 50 M3 or sufficient capacity for refill of one fire tender.

The water reservoir shall be provided with a high-pressure pump and single point fire hydrant outlet outside the room for refilling the fire tender in case of fire and emergency. Necessary valve shall be provided in the outlet. Water Act for pollution control etc.

In addition, limit on permeability as given in shall also be met with. In case of water leakage in the above structures, Injection Method shall be applied for repairing the leakage.

Glazing drawn sheet glass Min 5. Anodised Alum. Extruded Sections as at 1. Glazing with epoxy washable room drawn sheet glass Min paint distemper 55mm thick double glazingwith 12mm gap hermetically sealed. External finishing of the building using Acrylic Smooth exterior paint painting shall be Nerolac excel. Oil bound washable distemper on smooth surface applied with POP putty Provision of rain water harvesting is to be made.

Provision of Security Gumtee is to be made as per standard approved design. Internal wiring along with fittings and fixtures and control panel boards, main switch MCBs etc. BSES Display board with name of the grid of required size is to be provided. Inspection path all along the boundary wall to be provided. Provision of pantry is to be done. Provision of sump and pump is to be done for disposal of rain water from trench. Material, equipment and methods used in the manufacture of power transformer shall conform to the latest edition of following.

Rotating Electrical Machines. For Cooler Fan Motors. Standard Voltages. Co-ordination of Insulation. Current Transformers. Determination of Transformer and Reactor Sound Levels. Application Guide for Power Transformer. Terminal and Tapping Markings for Power Transformers. Low- Voltage Switchgear and Control gear. Bushings for alternating Voltages above V. Cable Boxes for Transformers and Reactors. Page 3. Conventional Same as 3. However boltless construction shall be preferred to avoid generation of hot spots and decomposition of oil as well as to reduce noise level.

Naphthalene base with anti oxidant inhibitor subject to Purchasers approval. One sample of oil drawn from every lot of transformer offered for inspection should be tested at NABL accredited lab for tests as listed under Table 1 of IS The cost of this testing should be included within disturbing bushing CTs.

As per 3. As per Annexure C technical particulars Minimum mm 1 Neutral shall be outdoor bushing type suitable for connecting 2 x 75 x 10 mm size GS strip and brought down to the bottom of the transformer supported by suitable support insulator made of epoxy resin cast For Delhi Discom. Bushing type neutral CT is not acceptable. CRCA sheet steel of thickness minimum 2. Terminal Clearances Termination height required for cable termination Essential provision for LV neutral cable box.

For cable boxes, marshalling box, OLTC drive mechanism etc. Nitrile rubber based. Specification of wires to be used inside marshalling box, OLTC drive mechanism. Essential provision for Capillary routing from transformer to marshalling box. Cable lugs to be used by the vendor For power cables For control cable Long barrel medium duty Aluminium lug with knurling on inside surface Tinned copper preinsulated Pin Ring, Fork type as application For CT connection ring type lug shall be used.

Surface preparation Finish on internal surfaces of the transformer interfacing with oil Frame parts By 7 tank pretreatment process or shot blasting method Bright Yellow heat resistance and oil resistant paint two coats.

Paint shall neither react nor dissolve in hot transformer insulating oil. AC V exchange switch for international specification. Aupply to 3. Balance charging is good to prevent the situation of over-charging or under-charging for a single cell. Auto-detected charge status display. Red light: while charging Green light: end of charging 5.

The auto-detected function of low voltage for power storage. View Details. Tel: Ordinary hardware solutions - phones or other devices, I control by checking the services of ping, telnet, ssh - by what is on the phone supported. Don't have an account? Sign Up. Aldern House Head Office maps-landscape-character. Once setup ill see how well the auto level feature works and then ill start tossing it around and see if it can save me from my horrible 3D skills.

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