Friday, 26 August 2011

A short note to establish a water supply scheme in urban or rural area.


A short  note to establish a water supply scheme in urban or rural area.

Prefatory

WATER SUPPLY & DRAINAGE

In the world of Disraeli " The health of the people is really the foundation upon which their happiness and all their powers as a State depend " It is obvious how environmental sanitation reflects on the promotion and maintenance of the health of the people .

     The provision of a safe adequate water supply is a basic requirement, the importance of which cannot be over emphasized, and this remark applies with special reference to a tropical country like India which is subject to epidemic waves of water borne diseases of great magnitude .

   The provision of pure water and proper disposal of sewage are two essential for improving the living condition of the people and ensuring their good health.

INVESTIGATION  FOR WATER SUPPLY SCHEMES

KEY PLAN:-

A key plan should be prepared to a foolscap size showing the town, the various sites proposed for the head-works, service reservoirs connecting roads, rivers or stream course etc . and other relevant features  of the area covered.

INDEX PLAN

An up-to-date town plan should be prepared to a scale of 1cm: 40M showing

(1)    The Corporation,  Municipal , or panchayat limits and any extension or future under completion shown in distinguishing coloures .

(2)    Levels at junctions od road, streets and lanes and also at the places in the road where the gradient change. The ward boundaries as taken for the purpose of the latest census, must be marked and the population figures noted there in.

BENCH MARKS

Permanent bench marks stones should be fixed at the intervals of not less than 1.5 KM and not more than 2.5 KM . Bench Marks stones should also be fixed at the site of the Head Works and Service Reservoir site . The permanent Bench marks  should be fixed based on the level of SBM stone under the control of department concern particularly under the control of the Public Works & Highways Department on confidential.

LEVELING OPERATIONS

Longitudinal section should be taken along the suitable and convenient alignment in roads, streets, and lanes for laying distribution , pumping and gravitational mains In the case of pumping mains, alternative alignment on cross countries must also be considered and levels taken. Detailed plans, sections of drainage streams , canals bridges culverts, whatever the mains are to be taken across must be prepared.

SURVEY PLANS AND SECTIONS

(a)    A key plan

(b)   An index plan showing the levels at junctions of roads , site of Service Reservoir, and ward boundaries with respective figures of populations, tha position of public fountains required in the town fixed in consultation with Corporation Municipal or Panchayat authorities.

(c)    Plan showing the Sanitary Bench Marks.

(d)   Emlarged survey plans showing there in clearly the various survey numbers comprising Head Works , houses, staff quarters, filtration plant etc. plotted to a large section.

(e)   Land plans and schedule for acquisition of site required for the schemes. If land is patta land  the consent letter of the owner of the land will be received or compulsory land acquisition proposals will be sent to the department consent, particularly Revenue Department to acquire the land as per the rules and regulations of the Government. 

(f)     Enlarged site plan of the Service reservoir as required.

(g)    Longitudinal levels for all streets, roads, lanes, alignment of pumping main Gravitational main and distribution mains plotted to a scale of !cm:40Mt longitudinal and 1cm: 1Mt vertical.

(h)   Cross section of streets and drain crossings.

(i)      L.S and cross sections of borings at the site of head works showing the different strata  M.F.L , N.W.L , L.W.L observed so far, besides individual sections of borings.

(j)     A site plan showing the position of borings put in during the nature of soil and their respective distances from each other and permanent object perfectly with bearings.

(k)    L.S. along the syphon pipe line or Connecting pipes showing natere os soil and sub-soil and water level ( N.W.L. H.W.L, and L.S.W.L.) along the lines as revealed by bearing put to along the alignment.

TRIAL PITS

At site of pump house, staff quarters , filtration plants, Service Reservoir trial pits shall be put down at suitable intervals and and nature of the soils, sub-soils, water levels etc. should be noted in the respective site plans in which the exact position of the trial pits should be marked.

BORINGS

Sufficient number of borings must put down at the site selected for infiltration works with a view to obtain a complete hydrological and geological survey of the whole area. Selection of borings must be plotted with the particular of soil and sub-soil condition.

LEVELING OPERATIONS:

1.Longitudinal section levels should be taken at the centre of all road , streets and lanes at 30Mt intervals and at junctions of all roads, streets, and lanes recording width of roads streets and lanes at every changes of width, information’s  as to whether metaled or not . The number of houses on either side of the streets upto junctions of another streets or lane.

2. SPOT levels for the sites of pump house , treatment works and sewage farm should be taken. Particulars or M.W.L Normal eater leval, lower summer water level and Bed level of nearby drain, channel or rivers should also be gathered.

TRIAL PITS

At the site of pump house, Treatment works, sewage farm and along tha alignment of main sewer trial pits should be excavated and the particulars as the nature of the soil and water level should be collected. Paticularly at pump house and along the alignment of Main sewers Borings should be put down for a depth of 5 meters.

Quarry map and lead statement should be prepared.

A-     WATER SUPPLY SOURCES NATURE SECTION

Water supplied as surface and ground water supplies.  The suface supplies are either from running streams such as rivers or from quiescent waters such as lakes natural or artificial. The ground water supplies are obtained from springs, Infiltration wells or galleries.

The usual contaminants of water are mineral or organic nature. The mineral dead organic matter may be present in solution or in suspension living organic may be micro or migro-organisms. The micro-organisms may be plankton or bacteria. The former are to the Zoo or phyto plankton according to whether they belong to animal or plant Kingdom. Bacteria are unicellular plant which multiply by fission. They can grown on a culture medium and are studied with difficulty under microscope. Plankton do not need a culture and can be easily studied under a microscope. In general bacteria make water unsafe while plankton render water unpleasant.

The main aim in purification of water used for drinking purposes is to make the water safe as free  from the microbes which cause disease and to bring down the content of the other matter to a limit of toleration compactable with the sense of aesthetics. The main criterion for an industrial water supply is the maximum content of the various constitutes chiefly minerals, the bacterial content being of a minor importance.

That branch of science which deals with the properties and characteristics of stream or flowing water is called Rheology and that which deals similarly with quiescent waters such as lakes is called Limnology. The physical, chemical and biological conditions of a all interrelated . The public health Engineer has to consider all the aspects of the nature of source and its bearing of the water quality to desiren the best method of purification , necessary in any case.

The selection of source for a place is depend on its reliability to yield adequate quantity of water according to demand and of water fit for the particular use cantailing the least amount for the works connected with collection , purification , conveyance and distribution.





 

What do civil engineers do?




What do civil engineers do?







To understand what civil engineers do, you need to think about what you do in the first hour after you wake up on a Monday morning.



You clean your teeth using the running water in your bathroom. Have a cup of tea or coffee. You travel to work on a finely constructed network of roads or on a train or underground system. You park your car or grab another cup of coffee at the train station before heading to the office. You might even walk through an underpass or over a bridge before finally settling at your desk. None of this would have been possible without civil engineers.



Civil engineers design and build bridges, roads, railways, and tunnels. They design and build tall structures and large buildings such as multi-storey car parks, train stations, and even the Olympic stadium.



Without civil engineers we wouldn’t have a constant supply of clean water, or sustainable energy to help us save our planet. Without civil engineers the world we live in would be completely unrecognisable.



If you’d like to find out more then download a full colour version of the Little Book of Civilisation now.

 . Comment by Laly 17 hours ago Delete Comment

civil engineering







Civil engineering is a professional engineering discipline that deals with the design, construction and maintenance of the physical and naturally built environment. Put simply, civil engineers build bridges, roads, canals, dams, tall buildings, and other large structures.



Civil engineering is all about creating, improving and protecting the environment in which we live. It provides the facilities for day-to-day life and for transport and industry to go about its work.



Like the Romans, Egyptians and Mayans who built great civilisations before us, our civilisation relies more than ever on teams of inventive people to design, build and maintain the sophisticated environment that surrounds us.



Civil engineering was originally defined simply to distinguish non-military engineering from military engineering but it actually represents so much more. Without civil engineers we wouldn’t have a constant supply of clean water, roads or trains to get to work in the morning, or sustainable energy to help us save our planet.



The Little Book of Civilisation looks at the amazing ways civil engineers overcome the challenges of creating and maintaining our infrastructure for us, and for future generations. Many of these challenges are met in a way that is sustainable, and all are met with style and innovation.

YOUR HOME STRUCTURAL SAFETY FIRST:


YOUR  HOME STRUCTURAL SAFETY FIRST:

Selecting a safe and trouble free home in urban areas of our country is increasingly becoming a problem for a common man. It is almost importance that amongst the several factors which a common man considers while purchasing his home the topmost consideration should be given to STRUCTURAL SAFETY. However, due to several other constraints this factor is often completely neglected or not given the importance it deserves. Greater consideration is given to other factors like FINANCE, LOCATION, CONVENIENCE, and TIME which are next importance to structurally safety.

MECHANISM OF REINFORCED CONCRETE STRUCTURE:

A high raise multistoried structure is generally constructed using local bearing reinforced cement concrete in its formwork and different types of materials as filler within the voids of formwork. This filler materials protects the persons and their belongings a against wind, rain, sun and other elements of nature and at the same time also protect them and their belongings from their fellow human beings. The reinforced concrete framework is designed and constructed to carry various loads and to withstand various forces. The Reinforced Cement Concrete framework consist of various members such as foundations, columns, beams, slabs etc. They carry their own weight besides the load of the persons, furniture, internal, partitions walls, external walls and all other fittings and fixtures, The RCC frame work, whether in an apartment building or a bungalow must remain structurally strong and stable throughout its life. The RCC framework of an apartment building or bungalow is like the strong backbone of the human body. If it is not properly designed, constructed and maintained, then the buyer is not only putting his hard earned money and property at stack but is also endangering the lives of his family members. Natural calamities like earthquakes or storms often induce additional horizontal loads to act on the structure. These can cause tremendous damage to life and property if the structure is not properly designed or constructed to cater to such loads. Hence STRUCTURAL SAFETY of RCC frame work must be given prime importance.

WHY DOES BUILDING FAIL?

Structures which are loaned, designed and constructed properly should have a very long life. Safety and stability do not get so easily affected in such cases. Then WHY DO STRUCTURES COLLAOSE?. The Gujarat earthquake on 26th January 2001 was an eye opener. Several structures collapsed within a matter of a few seconds . Earthquakes do not kill people, building do.

CASUSES OF BUILDING COLLAPSE

Some important causes which disturb the stability of a structure and can ultimately cause a collapse are generally classified as under:





 Inadequate planning and architectural layout Poor RCC structural design and detailing consideration ductility requirement of RCC framework under horizontal loads (earthquake under wind) or correct

loads and moments. By providing correct quantity of steel reinforcement in concrete , the structure is able to face the horizontal loads as steel imparts ductility to the RCC members’

 Us of poor quality materials, especially steel and cement, with intentions to economies’

 Improper proportion ting of materials in concrete mixes. For example, use of sand having a high sill content and clay ball or use of concrete aggregates (gravel or stone chips ) which are poorly graded not having proper shape

 Weak founding strata on which the building rests or weak foundations or providing wrong type of foundation

 Sub-standard construction particles and lack of or total absence of experienced, trained and qualified supervision during construction

 Poor maintenance of the structure . e.g. leakages, seepages, corrosion etc.

 Structural and non-structural cracks not attended to, causing loss of durability and ultimately loss of strength

 Neglect of general hygiene and cleanliness due to which rodent nuisance and harmful vegetation growth is caused. These weaken the foundation and the superstructure respectively

 Additional loads ( not planned earlier) imposed on the structure by the occupants, for which the structure was not designed . e.g. Additional overhead or lift tanks, terrace gardens, mezzanine floors, swimming pools air conditioning plants, cooling towers, balcony enclosures etc.

 Modification or removal of structural members such as slabs, beams and columns’

 Tampering with structural columns and beams to conceal electrical conducts water supply and drainage/ sewerage lines by cutting into the concrete. This often results in removing or damaging reinforcement steel and causes cracks in concrete

 Deep excavation very close to the existing structure’s foundation and causing undermining and differential settlement

 Landslides’

 Hurricane or storm

 Fire

Floods or soil erosion

 Earthquake

 Explosions/Bomb blasts

WHAT GENERALLY ATTRACTS THE BUYER?

It is observed that if one needs a house in a city then either the person contacts a broker, browses through the various advertisements in a local newspapers or goes by suggestions given by the friends and relatives. A very rosy picture is presented in all attract the buyer. Some of them as they appear in the local newspapers, are categorized below:

 Aesthetic features’

 Payments and cost related terms and conditions’

 Vocational advantages .

 Improved ambience related facilities.

 Security related amenities.

 Car parking provisions.

 Health and entertainment related amenities.

 Architectural layout merits.

 Other miscellaneous amenities.

SOME FACTS

Some facts need to be clearly understood by the buyer before he decides to purchase his new home.

IGNORED SAFETY ASPECT:

The above features or amenities are all badly advertised to attract the buyer, No features stressing on structural quality, stability or durability are advertised. This ia because the builders and developers are aware of what the common man wants. Very few developers have been recently advertising that their buildings confirm to resistant design.

So the buyer gets the desired amenities ,at the cost of structural safety. What is end of result? Severe distress in the structure some years later or a collapse triggered due to structural deficiencies or inadequate maintenance. It may be understood clearly that for a safe house, structural design, RCC construction and specifications have to be properly defined and executed.

STRUCTURAL ADVICE:

A buyer will often take legal advice or query the Builder and Developers on the quality aspect of concrete works or structural design. We therefore see no advertisement stating some points which indicate good structural design or good construction practices. It is recommended to take structural advice as for as possible finalizing the purchase.

LOW COST

Cost is the first criterion for selection. Therefore, a buyer is always inclined to buy his house at the cheapest prince available. Therefore are good chances that the builder has cut corners in his structural work by way of using cheep quality concrete materials, inadequate structural design, often compromising on safety aspect if the structure against natural calamities like earthquakes. Deployment of inadequate supervisory force and not exercising quality control of design and construction of RCC work are other cost saving methods which may lead to costly repairs or even a collapse if the purchaser is not careful and wants to buy his house at the cheapest price. All types of methodologies to cut corners are passed on to the buyer by way of methodologies to cut corners are passed on to the buyer by way of cheaper price. Careful observations have to be made before deciding to buy low cost house.

LAVISH INTERIOR AND EXTERNAL FINISHES:

Structural inadequacies are often made up by superficial glamorous looking plaster, stone (marble, granite etc.) work and / or paint. This along with other cosmetic features may increase the cost of the structure but does not help in any way in giving structural stability or safety. However, paying a higher price is also not an assurance for purchasing a structurally safe home. The lavish interior and external finishes as advised lure the moneyed buyer, but if the structural work is badly designed and / or constructed, he will soon realize that beauty is only skin deep. What is within the structure i.e. concrete quality counts more than external superficial appearance. It is the structural frame work which has to be sound and durable and the lavish external finishes and interiors have virtually no contribution to make towards structural safety, stability or performance of a new home. Hence the purchaser must invest his money in a structurally safe building with inadequate structural concrete work.

SAFTY FACTORS TO BE CONSIDERED BY PURCHASERS:

In order to avoid problematic situation in future, the common man just seriously consider the following factors before purchasing his flat or bungalow that will become his home. These are very important and must be given full consideration before a final decision is taken to purchase a flat:

1. Structure’s ability to withstand vertical loads as well as horizontal forces like earthquake and wind or any other can be best checked form the structural drawing and architectural layout.

2. It likely that drawings and other information form the Builder or his architect and Structural consultant may not be easily forthcoming. However, to safeguard himself, the buyer must insist on these details even if it becomes necessary to pay nominal charges for the same.

3. If it is not possible to get the above details the buyer can insist on certification from the Owner/Developer Architect, Contractor, Supervising agency and the Structural Engineer as per the formats suggested in Annexure A,B, C, D and E respectively.

4. It will also be useful to have a document from the Builder / Society containing names, address, telephone numbers of all agencies/authorities located. These details can come very useful to the buyer as an individual or society collectively, in case there is need to do maintenance or addition or alterations at any time during the occupancy. The addresses, names and telephone numbers of the following agencies/ authorities would be helpful.

 Builder / Developer.

 Architect

 Structural and Geotechnical Consultant/ Engineer.

 Constructor of both RCC works and other finishing works.

 Supervising agency or Engineer.

 Licensed electrical contractor.

 Agency / Supplier of elevations installed in Local Municipal authority in charge of sanctioning / approving the building.

 Municipal ward office and fire station under whose jurisdiction the plot is located.

In order to cover the factors that influence safety and stability in greater detail, guidance is given to the purchaser in two distinct options:

Option (A) when the building is under construction at the time of purchase .

Option (B) when the building is already completed or occupied at the time of purchase ( or resale)

PURCHASER’S GUIDE

BUILDING UNDER CONSTRUCTION AT THE TIME OF PURCHASE:

Architectural layout-

Properly planned architectural layout plans an important role of the structural stability. If layout is not suitable to the buyer then it should be revised before the building is constructed. If the layout not revised then the latter date the buyer is likely to make some changes leading to introduction of additional loads or change of user which can cause structural stability or damage resulting in reduction of life of the structure (durability)

VASTHU SHASTRA

If the purchaser is staunch believer of VASTHU SHASTRA then ha must get the architectural layout checked by a Vasthu expert and only satisfied, venture to buy the flat. Carrying out modifications or changing the use of various rooms to meet the vasthu requirement at the later stage may create stability or damager resulting in reduction of life of the structure.

BACONIES:

Certain areas like balconies are exempt fully or partly from the calculation of floor space index (FSI). In order to get full advantage of selling more area, the developer exploits such rules of building bye-laws. As a result the architectural layout is prepared to suit needs. Large cantilever ( projecting out supported at one end only) slabs and beams to accommodate such balconies are designed by the Structural Consultant to suit the architectural layout and developer’s requirements. If adequate care is not taken initially during its design and construction and later during is service life, these beams often shows sign of distress. They are also likely to collapse during an earthquake forces. 

BUILDING ON STILTS:

The ground floor is often used for parking cars. This area too is exempted from FSI calculations. Such buildings at the ground level generally have only columns with no masonry or concrete walls in between the columns. The building is therefore termed as “ BUILDING ON STILTS”. The lower story is called “SOFT STORY” Structures which are large cantilever projections on all sides to accommodate balconies have to be designed and constructed with adequate care as they are most vulnerable to collapse during an earthquake. It is advisable to get the design verified in such cases to assure safety of a new home.



DOORS AND WINDOWS:



Large windows and doors are good for air and light entry into a home. Aesthetically also the structure looks good with elegant looking windows and doors. However, large openings between columns reduces the lateral restraint during an earthquake and therefore the RCC framed structure has to be properly designed to clatter to this weakness. Also adequate care must be taken to avoid any opening within 0.6 m from the corner of the building.



SLENDER CONCRETE MEMBERS:



Slender RCC columns, fins, canopies and other members look architecturally good and elegant. Slender columns also occupy less floor space. However, generally slender RCC members are densely reinforced and it is very difficult to place and compact concrete in them. Due to construction lapses, large voids may be formed (honeycombs). These voids causes reduction of strength and also permit moisture, chlorides (if building is close to the sea shore) and other chemicals to enter concrete. Due to moisture and chloride entry into the concrete, the steel in RCC structure is attacked and corrosion of steel commences. Corrosion of steel is like cancer in a human body. It has to be stopped or else it starts spreading, causes concrete crack (spall). Steel (ferrous) When it reacts with water (moisture) and/ or chloride gets conversion causes the steel bar to grow in volume (expand) resulting in spalling of concrete. As a result RCC members having corrosion and cracking problem lose their stiffnessandstrength and if neglected can fail, causing the structure to collapse. Slender concrete members when visually inspected must be free from honeycombs and large voids.

LEAKEGES:

Leakages through roof, walls, toilet blocks are constant source of worry  the occupants. The paint peals off and the interior of the flat looks ugly with wet patches. Besides giving an ugly appearance, the presence of moisture over a long period of time can cause corrosion of steel in the RCC members and reduce their strength considerably.

Good and dense quality concrete is a must. Proper specification and construction can go a long way in preventing such leakages. Waterproofing treatment are a second line of defense and can work satisfactory it and only if the original concrete reasonable good quality. It is therefore necessary to examine the concrete specification, the method of construction, concrete mix design and supervision at site. The buyer should take technical assistance to review such parameters.



Leakage can also occur through through the plaster and masonry during the monsoon. Inspection to the building under construction, during heavy monsoon will indicted to the buyer some area vulnerarable of leakages. Leakages also occur at the junction of masonry (filter material with the RCC frame) and RSS frame work. It should be entrusted that the joints properly packed and sealed prior to plastering. All joints between the course of bricks /blocks must also be to be taken into consideration for masonry and plaster work. A good construction agency and good supervision should be able to prevent these defects.



Ready mixed Concrete (RMC) is available in certain metropolitan cities. RMC plants, under proper control, supply concrete mix to the builder or his contractor as per the specifications given to them by the builder’s consultant or architect.



CONSTRUCTION:



Selection of good quality and correct type of concrete materials. Adoption of proper Concrete Mix Design, providing site laboratory for testing materials and concrete, having good concrete production, placing and compacting equipment are hallmarks of a good constructor. Proper quality assurance methods along with a good, experienced, well trained and properly qualified supervisor will ensure stable and durable structure.



The buyer can visit the construction site as frequently as possible and observe if the captivities as stated above are being implemented. 



IF THE BUILDING IS ALREADY COMPLETED AT THE TIME OF PURCHASE:



ARCHITECTURAL PLANS/ LAYOUT AND STRUCTURAL DESIGN VERIFICATION



The following points to be considered.

professional reputation and standing of the builder, Architect and Structural Consultant must be investigated before purchase. Alternatively their previously designed and constructed structures may be visited for inspection.

The seller may be requested to give copies of architectural layouts/plans and structural drawings for having these checked by a consultant.

The structural design can be got checked by the structural Engineer for adequacy against earthquake as in case of 9 . 1 . 3 . 9 . 1 . 4 . 9 . 1. 5.

A copy of the plants of the building approved by the local authorities should be obtained and checked if the work has been carried out as per approved plans.

Regarding Vasthu Sahastra would also be applicable here.



REPAIRS, ADDITIONS AND ALTRATIONS:



The following points need serious consideration.

Past history about structural repairs must also be investigated. If the structure has been repeatedly repaired if is advisable not to purchase the flat in such a building.

If there are any additions or alterations made in  the building deviating from the orginal drawings, it is advisable that the same are checked by the Structural Consultant. Most of the time occupants carry out several structyral changes out of ignorance and negligence causing building collapses. Hence this aspect require serious thought before puachase.







GENERAL CHECKS”



It is essential to check the following:

Damp patches, leakages, cracks etc., not only in the flat one desires to purchase but also in other parts of the building should be checked out. If there are several damp patches, leakages, and cracks, purchase should be avoided. If there are minor problems, it is advisable to investigate if the neighbors will cooperate in repairs specially when leakages is from the flat above adjoining.

Leakages in water supply drainage, sanitation lines should be checked and if required these could be attended to before occupation. This would be an additional cost over the purchase price.

Ensure that leakages from the flat or terrace above are stopped before the purchase of flat. If not done, at a later stage such leakages can create considerable nuisance and even endanger the structural safety.

The leakages and damp spots in the flat located below should also be examined. This can cause a problem at a later stage after occupation. If leakage exists, rectification before occupation is necessary. This would mean an additional cost to be included to the purchase price.

Internal layout of concealed electric wiring, plumbing and drainage systems must be obtained from the seller and examined by competent persons for their adequacy.

If in doubt, a technical opinion b efore procuring the flat should be obtained as stakes of investment are very high. Besides it can cost ones life as well as the lives of family members, if the structure is sevely deteriorated or not adequately designed.  



AUDIT/STATUS REPORT:



This is an important aspect the purchaser needs to atted to. An audit report from a Civil Engineer covering various repairs necessary and their cost will help in negotiating the orice with the seller.



ELECRICAL WIRING:



Certain precautions are also necessary to be taken in this regard. They are as follows

It is essential to have as built layout concealed electrical conduits. This must be insisted upon by the purchaser. A licensed electrician can be appointed by the buyer to get the entire electrical system inspected properly.

Many serious fires are caused due to poor jointing wires or under capacity wiring. This can result in short circuit and causes fire.

It is always preferable ti have the overload tripping device installed in each home with a separate trip device for each room.

Layout and location of switches should match the buyers requirements and should be such that they can easily maintained. This must be finalized before the construction. Many times electrical conduits are concealed in RCC columns, beams and slabs causing damage to the structural member. In order to accommodate large conduits or cluster of conduits, reinforcement steel bars are also often cut or removed. This can prove to be very dangerous. The structure can collapse.

At times it is observed that leakage water enters the embedded electrical conduits and travels to the electrical fittings and fixtures. This is extremely unsafe for the occupants. This must be attended to before the buyer occupies the flat.



FIRE FIGHTING SYSTEM



It is essential that certain precautions are taken in this regard by the purchaser.



They are as follows.

For high-rise structure (above four stories) it is mandatory to install a fire fighting system.

It should ensured that the fire elevator and fire escape staircase with fire resistant doors are provided besides other equipments insisted upon by the Chief fire Officer (CFO)

It should checked if all installations and layout of fire fighting systems as given in the no objection certificate issued by CFO are complied with. The safely of the structure depend on this.

It should be ensured that the fire pump installed is always in good working condition. Do not allow fire fighting tanks to be misused or remain empty.

It is important to note that fire-fighting system should be capable to fight the fire in the initial period before fire brigrade arrives.

Telephone numbers of the closets fire station and the central control room of the city fire brigade should be kept handy and displayed at proper locations in the building.

Fire escape staircase and passages should be kept free from obstructions and not used for storage purposes.

Buyer and his family members must acquaint themselves with the layout of the escape routes, staircases, refuge areas and the locations of the fire alarms.



PLUMPING< DRAINAGE AND SANITATION WORK



Proper plumbing, drainage and sanitary work are required as most of the leakeges and subsequent structural damages take place due to the defective materials and workmanship. The following points must be noted by the purchaser.

Layout of plumbing and drainage system should be such that it can be easily maintained in case of any problem or defect.

Proper jointing and protecting of concealed water supply, drainage and sanitation lines help to avoid leakages in future. Piping and drainage as built layout from the builder should be insisted on.

It is generally observed that the leakages from toilets and bathrooms are due to defective joints between the pipes and fittings rather than joint between the tiles. Hence all joints the tiles. Hence all the joints between the plumbing lines /fittings must be properly tested for leakproofness before concealing them. Similarly all joints between sanitary lines, fittings and fixtures must be properly sealed before they are concealed in the sunken portion or in the walls.

Leakages should also be observed around the locations of nahani trap outlet.







INTERSTING INFORMATION ABOUT CONCRETE:



Concrete is an extremely durable material provided it is designed, specified and constructed correctly. However, if not specified and produced correctly it can give serious problems. Two types of defects generally occur in concrete.



a)      Micro defects not visible to the naked eye but having a long term effect on durability (life to structure)



b)      Micro defects visible to the naked eye and having both a short term and a long term effect on durability.



MICRO DEFECTS:



These are generally small capillary pores and fine cracks. As long as they are discontinuous thet do not pose any problem. However, due to wetting and drying, loading and unloading cycles, climates and various other reasons, that get interconnected causing environmental pollutants like water (moisture), chlorides, carbon dioxide and sulphates to enter concrete and chemically react with steel(water and chloride) in concrete or with concrete itself ( carbon dioxide and sulphate) causing chemical reaction like corrosion carbonation ( acidic action on concrete) and eltringite ( chemical which expands and cracks concrete ) formation which reduce the rigidity of the concrete and make it weak.



These micro defects are generally caused due to the following reasons:

Inadequate structural design can cause very fine cracks.

Additional load over and above those anticipated in structural design, will cause fine cracks.

Modifications done on the structural member will causes cracking.

Use of high water to cement ratio in the concrete mix during construction will cause fine capillary pores ( porosity)

The practice of hacking freshly placed concrete can result development of micro cracks. This must be totally avoided. Hacking of concrete is done on the surface to give good mechanical bond to the plaster which is applied subsequently.







MICRO DEFECTS:



These are large defects seen with necked eye and result the poor strength and cause very rapid deterioration, posing problems to the stability of the structure. They are generally seen a large voids ( honeycombs) visible cracks, large capillary pores, joints between two subsequent concrete pours or cold joint caused due to time gap between two layers of concrete during the process of concrete pouring.



The micro defects are generally caused due to formation of the following:



HONEYCOMBS:



Honeycombs are cause due to the following reasons .   

Use of learn watery concrete mixes.

Inadequate proportion of fine material ( cement+ fine sand) resulting in non-cohesive (harsh) concrete mix.

Inadequate mixing of concrete materials.

Segregation (separation of concrete mix constituents) while transporting placing and compacting concrete.

Poor quality of formwork (mould to retain concrete till it sets and gains adequate strength)

Dense reinforcement steel due to which placing and compacting of concrete becomes difficult.

Over or under vibrated concrete can cause porosity in concrete. Vibration of concrete should be done with a proper mechanical vibrated concrete can cause porosity in concrete. Vibration of concrete should be done with a proper mechanical vibrator only. Many builders still use the traditional bamboos for concrete compaction, which is absolutely inadequate. Mechanical vibration of concrete results in removal of entrapped air from concrete and densification of concrete.



CRACKS:



Some causes of concrete cracking are given below:

Due to high ambient temperature, low humidity and/or wind, water from surface of the concrete evaporates causing cracks. This can be avoided by covering the freshly placed concrete with plastic sheet.

Curing of concrete is the process of spraying water on freshly set concrete continuously for at least seven days. If curing is neglected, water on freshly set concrete surface and pores evaporates causing shrinkage c rakes and also causing strength reduction.

Concrete materials like sand, stone chips and at times even water are stored in the open. Due to high ambient temperatures, they get heated. Hot materials if used in concrete causes concrete temperatures to rise and subsequently evaporation loss will take place from concrete surface causing cracks

Water concrete mixes due to less cement or water can result in excessive evaporational loss of water after concrete is set. This will result in cracking of concrete surface.

Excess of fine materials like silty sand, cement or mineral admixtures and can cause cracking.

Concrete in pathways, pavements and slabs have large exposed surface and therefore have greater possibility to lose moisture or water from its top surface and inevitably crack. The top surface is therefore given groove or cut at certain intervals, so that cracks appear at the desired location of the groove/cut and not at random. If the spacing between groove/cuts is not adequate concrete will also crack in between.

If structural design is different, concrete in beams and slabs will defect and crack.



JOINTS:



As concrete structure is cat step by step, joints re formed between the concrete poured earlier and concrete poured subsequently.



If the joints are not carefully designed and constructed, there will be esy access to moisture from outside which can create corrosion problems for steel in concrete. It is advisable to have minimum number of joints in a RCC frame work. However, in order to minimize the number of joints the Constructor must have adequate equipment and compact without any delays or stoppages in between.



The quality of joint depends on the following :

Preparation and cleaning of earlier placed concrete at the point location.

Planning an sequencing of concrete power along the joint.

Segregation of concrete mix at the point.

Quality of form work at the point.

Compaction of concrete at the joint due to dense reinforcement.

Workability of concrete placed at the joint resulting in poor compaction.  



CONCLUSION:



IT IS EXTREMELY COMPLICATED TO COMPLETE ALL FORMALITIES FOR THE PURCHASE OF A FLAT. THE COMPLICATIONS START FROM ARRANGING FINANCE, OBTAINING REQUIRED DOCUMENTS TO GET THE LOAN SANCTIONED, NEGOTIATION WITH THE SELLER AND ARRIVING AT THE TERMS OF PURCHASE AND ULTIMATELY OBTAINING THE MEMBERSHIP OF THE CO-OPERATIVE HOUSING SOCIETY.



THIS DISCUSSION HAS GIVEN SOME GUIDELINES TO THE PURCHASER. IT IS UPTO THE PURCHASER TO DECIDES THE EXTENT TO WHICH HE DESIRES TO FOLLOW THESE DUIDELINES. HOWEVER, THE PURCHSER MUST MEMBER THE FAMOUS SAYING APPLICABLE TO A HUMAN BEING “ HEALTH IS WELTH”. IN CASE OF BUILDINGS TOO THIS IS APPLICABLE. IF THE STRUCTURE IN WHICH YOU BRESIDE IS NOT HEALTHY AND IS WEAK NEEDING CONTINUOUS AND ENDLESS REPAIRS, IT WILL DRAIN AWAY ONE’S RESOURCES AND ULTIMATELY ONE MAY LAND UP PAYING MUCH MORE FOR REPAIRS THAN WHAT HAD BEEN PAID TO PURCHASE ONE’S NEW HOME,



IF ONE DOES NOT SPEND ON REPAIR THEN HE IS TAKING A RISK. THE STRUCTYURE CAN COLLAPSE. THIS MEANS THAT LIVES ARE AT STAKE. THERE ARE ALSO GOOD CHANCS OF CONSIDERABLE LOSS OF PERSONAL BELONGING AND ONE MAY HAVE TO START LIFE FROM SCRATCH ONCE AGAIN. HENCE, WHILE SELECTING A HOME ONE MUST GIVE TOP MOST PRIORITY TO STRUCTURAL SAFETY AND GIVE LESS IMPORTANCE TO OTHER CONSIGERATIONS. A HOME IS AS PRECIOUS AS LIFE AND THE LIVES OF FAMITY MEMBERS. SO BUY A “ STRUCTURALLY SAFE HOME” .



AFTER PURCHASING A STRURALLY SAFE HOME, IT IS ALSO INPORTANT TO LOOK AFTER IT AND MAINTAIN IT PROPERLY.


MAKE GRADUATE CIVIL ENGINEER AN ASSET


MAKE GRADUATE CIVIL  ENGINEER AN ASSET



A fresh Graduate Engineer joints a professional organization either as a trainee or as a junior employee. The senior professional personal in the organization has to lead the young Engineer and launch him in the profession



This small publication serves as a reference book to help the Senior professionals to:



> Think and structure the role they have to play in impacting practical knowledge and skills to the young Engineer.



> Evolve a methodical and practical approach to the Graduate.



> Be a facilitator for the overall development of the Graduate.



The quality of efforts put and the time sent b the seniors of the organization in the introduction programmer of the young Graduate is a worthwhile investment for the future of the organization as well as the country and ti the career development of the Graduate. This one form of creation wealth.



INTRODUCTION TO CIVIL ENGINEERING PROFESSION



A Civil engineer Graduate, fresh form the university , is expected to know theoretical aspects of Civil Engineering. He might have broad indication of how their is applicable in practice. The experience ha has gained during some site visits during college world .



Organization induction process in the design office and in site is essential to mould him to be a successful and professional competent Civil Engineer.



The fresh graduate has to gain knowledge, experience and proficiency in the following field:



The need and requirement of the client and users



* Field survey Soil investigation’s



* Site Topography’s



*Infrastructure needs



*Environmental needs



*Engineering design of Civil Engineering Works.



*Preparation o Drawings



*Drawing Interpretation



*Construction Materials- availability & quality



*Contract documents – ( General Conditions, Social Conditions, Drawings. Unlit Assurance, Specifications, Commercial Conditions, terms relating to variation in cost and time schedule, Escalation clause, Arbitration provisions )Ø



* Quality Control Methodology’s



*Project Management’s



* Communication skills and Negotiation Skills



*How to participate in a team of Mega Projects, Millie discipline in nature



*Safety Aspects.

HOW TO

OUR RESPONSIBILITY



As a senior in profession, you have responsibility to be facilitator for the career development of the Graduate CIVIL ENGINEER and for ensuring that the Graduate Engineer will imbibe ll the professional ethics and standards.



Your concern and responsibilities are achieved by:



· Planning the work you give



· Explaining the objective of the work, methodology of work and anticipated end product.



· Passing on the benefits of your personal experience of similar work.



· Closely observing the progress and offering solutions to problems that may pop up.



· Appreciating the achievement of the goal by the Graduate Engineer.



HOW TO GO ABOUT DEVELOPMENT OF THE GRADUATE:



Have a one talk with the graduate, gauge and ascertain.



· Present level of theoretical knowledge.



· Experience if any.



· Professional ambition.



· Career expectations.



· Extent of commitment to be achiever, While planning the training and development activities and setting the task for the Graduate, care has to be taken to blend:



· Professional ambition of the Graduate.



· Organization requirement.



· Professional ethics.



You have maintain a training record detailing the progress, achievements etc. Periodical interview of the Graduate is necessary to assess the extent of assimilation of knowledge by the Graduate trainee.



HOW GRADUATE CAN HELP HIMSELF:



Kindle interest in self development approach and encourage professional interests. Motivate the graduate Engineer to:



· Read technical and professional journals.



· Make a presentation to a group in the organization of what he has read in the journal.



· Participate in the activities of Professional Institutions and society.



· Conduct market reconnaissance to know about the new materials introduced in the market.



· Discuss work with colleagues.



· Interact with people of other professions.



· Attend seminars, workshops etc.



· Contribute articles to house journal of the organization.



 GO ABOUT SETTING TASKS TO THE TRAINEE ENGINEER



The Trainee Engineer will no doubt be eager to jump into performing the task assigned to him. Before he starts the work you should make sure of:



· The scope of the Task.



· Importance of the Task in the overall scheme.



· The specification for the Task.



· Quality acceptance standards.



· The time by which the Task to be completed.



· The Methodology of doing the Task.



· What the Trainee is going to professionally gain by doing the Task.



· How successful completion of the Task ensure a forward step in career development.



CHARACTERISTICS OF TASKS TO BE GIVEN TO GRADUATE ENGINEER:



The Task should be:



· Within the Graduate’s present knowledge.



· Related to the requirement of the organization.



· Challenging.



· Thought provoking.



· Should enable the Graduate to learn new skills.



· Sensitive to performance measurement. The extent to which quality standards and delivery schedules have been adhered to itself is a measurement of performance.



SUCCESS OF INDUCTION PROGRAMME:



The rapidly of absorption of knowledge and skills by young Graduates Engineers will depend up on a) YOU b) The Graduate c) The job.



The success of introduction programmed depends on



1) The quality of your:



· Content of coaching, delivery of instructions.



· Counseling.



· Methodology of passing knowledge & Experience.



· Punctuality, commitment and Enthusiasm.



· Clarity of conveyance of thought.



· Motivating ability.



2) The Graduate – depends on his



· Motivation.



· Previous Exposure and Experience.



· Ability to assimilate.



· Positive Approach to work.



3) The job:



While job is given to the Graduate, you have also to explain lucidly how to:



· Look for areas where mistake can occur and how to avoid them.



· Maintain quality standards.



· Develop good healthy relationship with the client, co-workers, contractors.



· Understand business culture and work for profitability.



· Avoid cost over runs and time over runs.



· Enforce safety regulation at work place.



Foreseeing the probable difficulties of the Graduate Engineer in comprehending all aspects of the job requirements you to have to:



· Supervise the job closely and frequently.



· Conduct stage wise checking.



· Evolve solutions to problems which may crop up from time to time fully involving the Graduate in finding solution.



Your job can be easier if you:



· Educate the graduate Engineer on the objective of the work and requirement of the client.



· Explain specifications and contract implications.



· Encourage questioning.



· Clarify the Graduate’s doubts and problems.



· Do not misunderstand the repeated exhibition of lack of knowledge by the Graduate Engineer.



· Demonstrate methodology of work.



· Allow the Graduate to perform without much interference.



· Appreciate the achievements.



· Explain the importance of cost control and adherence to time schedule.



REVIEWING AND CONTROLLING:



After setting quality standards for work and stressing the importance of time schedule for the work, your job is to appraise the performance of the Graduate.



REPORTING:



· You have to encourage to produce daily task progress report.



· Demand detailed communication of the site problems.



· Insist preparation of Graphical Charts of progress manpower.



All these reports and charts to be reviewed with the Graduate Engineer. Reviewing the achievement report during the interview is desirable.



PERIODIC STRUCTURED APPRAISAL:



This appraisal may be in the form of submission of achievement reports by the Gradate Engineer followed by interview. This appraisal is more formal.



· Gives an insight into the extent of assimilation of knowledge and skills by the Graduate Engineer.



· Enables restructuring the training programmed.



· Enable the Graduate Engineer to Engineer to develop communication skills.



· Is a motivating for the Graduate Engineer.



This appraisal and periodical interview should be effectively used to check Graduates.



· Commitment to the task.



· Loyalty to the Organization .



· Quality of work achieved against standard set.



· Adherence to the time schedule.



· Aptitude for cost control.



· Initiative.



· Behavior with colleagues.



· Professional pride.



· Contribution to Team culture.



· Ability to carry on the work with minimal supervision.



· Field of performance for further training.



· Views about the content and methodology of training.



· Standard of achievement as a potential professional Engineer.



HOW TO GO ABOUT INTERVIEW AND APPRAISAL



Interview is a tow-way process of communication between the graduate engineer and you. It is therefore essential that you:



· Listen to what Graduate Engineer is saying.



· Understand what has been said.



· Put excellent lead questions to explore further and evaluate the strength and weakness of the Graduate.



· Lean to mutually agree to what has been reviewed and understood.



STEPS TO BE TAKEN BY YOU:



BEFORE THE INTERVIEW:



· Read carefully the achievement report and other related documents

.



· Ponder over and formulate the points for discussion.



· Arrange the points for discussion in a logical order. This will enable the Graduate to easily comprehend your questions.



· Be free conduct interview with out any interruptions.



· Find out the field of preference for further training.



· View about the content and methodology of training.



· Standard of achievement as a potential professional Engineer.



CONTINUOUS APPRAISAL



· IS informal.



· Enables to give guidance on the job.



· Leads to form part of the day-to-day supervision of graduate’s work.



· Enables to develop confidence and work culture in the graduate Engineer.



· Give enough advance notice about the interview to the Graduate Engineer allowing sufficient time.



· Allow sufficient time for the conduct of interview.



· Ensure privacy and confidentially.



DURING THE INTERVIEW:



· Welcome with smile.



· Create quiet and pleasant environment.



· Keep your composure.



· Maintain constructive attitude



· Encourage the Graduate Engineer’s to come out of shell and communicate.



· Ensure clarity in questioning.



· Recognize and openly give credit to good work done.



· Avoid enquiry attitude.



· Identify facts and opinion and sort them out.



· Find out Graduate Engineers reaction to further training you have outlined to him.



· Find out the Graduate’s future plan action.



· Records notes to main issues discussed.



· Notes down important points.



AFTER THE INTERVIEW



· polish and finalize the notes taken during interview and record it.



· Let the Graduate Engineer see the minutes of the interview and obtain his concurrence.



· Monitor the graduate engineer’s further action.



· Important your own plan evolved for further training.



There is little doubt that quality has becomes a buzz-word in the present Globalization era. The measuring of the world quality is very much dependent upon the contest in which it is used and the preparation of the various people who will transmit and receive the message. It is therefore crucial that any organization and the people with in it, reach a clear consensus and understanding of what quality mean for them, otherwise exhortation to, IMPROVE THE QUALITY OF SERVICE, will be interpreted in different ways be different people, leading to confusion.



Training is one of the effective method of upgrading the people to deliver quality of services and achieve the objectives of the organization. The necessary of the training is more essential to a new entrant to the organization. The time spent and efforts put by the seniors of the organization will pay rich dividends to the organization as well as to the country, aeration of human wealth to the nation.



Acknowledgement



“SO YOU HAVE A GRADUATE ENGINEER”


A guide for practicing Civil Engineers by CAT services Commission, LO