Implementation of Green Policies in the Construction Industry Essay

Undertaking 01

The garment mill is traveling to construct in a industrial zone of southern state of Sri-lanka. 1.5 kilo metres of bomber route will link to Hambantota habour route. This topographic point has an easy entree with Hambantota general infirmary, constabulary station and other community centres. Already there is constructing which was used as shop.

Constructing a green edifice is non a easy development manner. It is an attack to a edifice suited to the demands of its continuance period, which has it’s bearing and importance will merely go on to increase. Constructing a Green edifice is an attack toward planing, building, operating, and taking seems to diminish human impact on the milieus while fostering healthy and comfy environment and communities.

Sustainable Sites

Construction activity pollution bar

Waste Decrease: Construction and destruction creates a immense sum of solid waste in the universe. Constructing deconstruction is another manner to all-out destruction consequences in monolithic reduces of dismantled waste merchandise. In this undertaking besides the old shop is non traveling to be demolished. The shop will travel under minimum alterations.

Development densenessandcommunity connectivity

The country chooses for a mill based development demands good transit installations or entree, nearby infirmaries, fire brigade and constabulary Stationss. So as per the description this undertaking besides has those characteristics.


Brown field means harmonizing to the old industrial work a portion of land unmaskings with risky or pollution. But in this instance there were merely a shop.

Public transit

Personal transit causes immense sum of vehicle fume to the environment. And besides it creates a big sum of parking transition. For this undertaking there will be a company conveyance installation to the workers.

Protect or reconstruct home ground

Protection of the nature during the building and building wastages should be maintained. In this undertaking the constructing topographic points will be site veggeted other topographic points let as it is. Plants will be replaced by that country workss. Because if a new works can non be adopted the new topographic point and the undertaking taking topographic point is warm topographic point in Sri-lanka.

Storm H2O design

Rain H2O that flows off of non-permeable surface instead than being absorbed by the land.

Water Efficiency

Water overflow can be the ground waterway eroding, implosion therapy, and take polluting contents into H2O beginnings. Redirecting storm H2O, constructing floor with permeable stuffs, and utilizing green roofs can command and use flood.

Waterway deposits: The flow of solid stuff into a organic structure of H2O, frequently ensuing in pollution of H2O beginnings with fouling contents.

Soil eroding: The disruption of dirt by storm, H2O, or other motions, sometimes leads to landscape awful conditions, ecology harm, or waterway pollution.

Advanced effluent engineerings

Recycle rainwater and gray H2O can be used for urinal flow and irrigation can continue clean H2O and output important H2O nest eggs.

Energy and Water Savings: The beginning effectivity provided by green design and engineering leads to severe decreases in operation costs that can be easy retrieve any extra undertaking costsand continue to offer theatrical long-run nest eggs. Capital antecedently directed toward public-service corporation costs can be used for other intents.

Energy and Atmosphere

Minimum energy public presentation

Green constructing techniques like solar powering, twenty-four hours illuming usage of natural sunshine to supply interior lighting. Efficient edifices exert less demand on the local electricity web and H2O supply, depended on the capacity of local substructure.

Optimize energy public presentation:Energy can non be wasted. Maximum plants have to be done by little sum of energy. Unwanted lighting, H2O escapes and stopped vehicle working engine have to be stopped.

On-site renewable energy:little air current Millss besides can be made because it a coastal part.

Enhanced refrigerantdirection

Green power

Photovoltaic: The coevals of power utilizing solar panel boards to change over the natures sunlight into electricity. The roof this undertaking has to hold these solar panel boards.

Materials & A ; Resources

  1. Storage and aggregation of recyclables
  2. Building reuse
  3. Construction waste direction
  4. Materials reuse
  5. Regional stuffs
  6. Certified wood

Indoor Environmental Quality

  1. Minimum Indoor Air Quality ( IAQ ) public presentation
  2. Environmental Tobacco Smoke ( ETS ) control
  3. Increased airing
  4. Low-emitting stuffs ( e.g. adhesive & A ; sealers ; pigment & A ; surfacing ; floor mat systems )
  5. Inside of the edifice chemical and fouling beginning direction
  6. Controllability of systems ( illuming and heat comfort )

Innovation & A ; Design Process

Four points available for invention in design

Green premium: Undertaking costs increasement connected with the add-on of green characteristics.

Green roof: The edifice roofed to the full or partially by flora, forestalling storm H2O overflow and to absorb C dioxide from the air.

Increase Employee efficiency:Employee efficiency has been positively connected with indoor environmental state of affairs, and shows betterment where green rules have been applied.

If this undertaking do all the above consideration the garment mill will acquire the green certification.

Undertaking 3.1

Purpose of cost control

  • To restrict the client’s outgo to within the sum agreed. In simple footings this means that the stamp amount and concluding history concluding history should about compare with the budget estimation.
  • To accomplish a balanced design outgo between the assorted component of edifices
  • To supply the client with a value for money undertaking. This will likely ask the consideration of a total-cost attack. ( Ashworth, A. , 2004 )


Design Development Stage each component should hold a cost mark ; the cost control procedure involves look intoing that the cost allotment is realistic, now more elaborate information is available, utilizing approximative measures. Cost checking at the Technical Design Stage involves:


Entire cost

of component

( ? )

Cost per M2

gross floor

country ( ? )

Component unit



unit rate

( ? )




6 1000 M2


• Costss are presented in a assortment of ways, with the cost of preliminaries shown individually or apportioned amongst the component, for illustration, Table 2.3

• It can be seen from Table 2.3 that the cost per M2 of gross floor country is ?62.6, whereas the element unit rate is ?313 per M2 of component. Given the pick, the more accurate cost information is the element unit rate as it reflects the existent cost of supplying a specific component, whereas the cost per M2 of floor country can be corrupted by other factors such as edifice program form, etc.


The chief aim of cost control is to minimise and cut down the undertaking costs. Cost control is necessary for all types of undertaking ignoring its sizes.

Undertaking 3.2

Gross floor country– 20,000 m2( Assumed country )

Building contract item

  • Duration for finance- 3 old ages ( Assumed clip )
  • Gross floor country=20000 m2
  • Non – lettable country– 18 % =20000 ten 18 %


Therefore ;

  • Lettable floor country=20000 – 3600

=16400 m2

  • Net income=16400 m2ten ? 85/ m2

=? 1394000

  • Year purchase @ 8 %=100/8

= 12.50

Therefore ;

  • Gross Development Value=?1394000x 12.5

=? 17425000

  • Land cost value

Short – term finance 17 % in 4 years=? 145,000.00 ten 17 % ten 4

=? 98,600.00

Land cost value=? 145,000.00 + ? 98,600.00

=? 243,600.00

  • Developer’s net income=?17425000x 15 %

=? 2613750

Therefore we can cipher allowable edifice cost and demo it’s below tabular array.


Amount – ?

Gross Development Value


Land Cost Value

( 243,600.00 )

Developer’s Net income

( 2613750 )

Allowable edifice cost


Undertaking 4.1

Interim rating

It is a normal pattern for contractors to be paid on history of building work process. It is by and large recognized that it would be unreasonable to anticipate contractors to finance building operations without helper from employers. If the contractor borrows big sum of money for the building works without the interim payment method, contractor has to pay involvement to that saddle horse.

That will increase the undertaking cost to the contractor. It is the duty of the employers to minimise the unneeded cost of the contractor. Therefore all the standard signifiers include commissariats for interim payments.

  1. Interim certifications and interim rating includes
  1. Valuing the work completed on site
  2. Valuing any goods or material industry on or off site which can be included under the footings of contract
  3. Agring this sum between the client and contractors surveyors.
  4. Advising nominated sub contractor that payment should be expected.
  1. Agreement for the concluding history

Thingss we do under the understanding of concluding history.

  1. Remeasurement of work
  2. Adjustment for premier cost amounts
  3. Provisional amounts which form the footing of nominative work would be dealt with similar ways as accommodation for the premier cost amounts
  4. Day work histories including their mandate for pertinence, clip material measures and pricing
  5. Addition cost for rising prices where there is a status in a contract

Review of ratings

The following elaborate cheques should be carried out

  1. The calculation has been prepared by the Quantity surveyor where he is responsible for describing ratings.
  2. The gross rating is within the sanctioned financess and or fiscal statement figures and rede the architect/employer if there is a likely demand for excess financess.
  3. The preliminaries and insurances have been calculated in conformity with established policy, such as prorate to the value of work done.
  4. The work done has non been under – or over- valued by mention to architect’s progress study.
  5. The value of stuffs on site does non transcend the value of stuffs to be incorporated into plants for the extroverted two to four months, depending on the size of contract and phase of completion.
  6. Defective work, where applicable, has been notified by the designer and the value deducted from the rating.

Undertaking 4.2

Development value

The development value of a secret plan of land is the difference between the costs of development, which will include the costs of the land, building, etc and the market value of the finished work. The latter is much more subjective and hard to foretell since it is more influenced by the province of the economic system at the clip of completion, which will be some clip off. It will besides be in competition with other similar undertakings that will be available at the clip of completion.

There are broad scopes of consideration act uponing the development of a building site. These includes

  1. Location
  2. Type of development envisaged
  3. Shape, size, topography, facet and entree
  4. Land location and site readying troubles
  5. Handiness of public-service corporation services
  6. Planning controls
  7. Legal considerations
  8. Government aid that might be available

( Referee: Allan Ashworth, Pre-contract Studies, 2nd edition )

Example: A developer builds a edifice it cost Rs 20,000,000 inclusive all outgo land cost, building cost, Professional fees, authorities authorization fees. The market value of that belongings Rs.35,000,000.

Development value= Market value- Total cost of the development

= Rs.35,000,000-20,000,000

= Rs.15,000,000

Residual Method

In this system edifice is valued on the footing of its hereafter worth after transition and the cost of the work together with the developers cost are so deducted. The staying amount is the value of the belongings in its original province and it is known as residuary value.


A Real estate developer desires to calculate what they can run into the disbursal of to pay for 4 hectare site utilizing the residuary method. They assumes he can construct 225,000 M? of lodging on the site and sell it for Rs 4,000/M? . He estimates Development Cost at Rs 42,000,000.00 and will necessitate a net income border of 25 % of GDV.

Residual Value-Computation

Gross Development Value for 225 units if 100M? each at 4,000/M? Rs 90,000,000.00

Less: Entire Development Costs Rs -42,000,000.00

Less: Minimal Net income Requirement @ 25 % on GDV Rs- 22,500,000.00

Land Value Rs 22,500,000.00

Equivalent Residual value per hectare Rs6,375,000.00

Comparative method.

In this method direct comparing is made against other type of belongings on the unfastened market. This is much popular to value residential belongings. This method is merely dependable, nevertheless where there are sufficient records of many recent dealing and the belongingss are in the same geographical country.

The most widely used signifier of rating ; it uses direct comparing with monetary values paid for similar belongingss to the one being valued. The followers should be noted:


A existent estate developer is looking for a comparative dealing to help them value a 5 perch site. They find that 7 perch site close by was late sold for Rs 3,000,000.00. They estimate that rectifying unnatural land conditions will be proprietor Rs 500,000.00. So they implies a entire market value of Rs 3,500,000.00 for the comparative site, or Rs 5,000,000.00 per perch

Comparative site-computation

Transfer monetary value Rs 3,000,000.00

Attention deficit disorders: Estimated abnormals Rs500,000.00

Rs 3,500,000.00

Area of Site ( perch ) 7

Comparative value per perch Rs 500,000.00

The site for rating is in a better location where monetary value for tantamount belongings are higher so he adds 25 % to the comparative value, doing Rs 625,000.00 per perch

Evaluation Site-Computation

Comparative value per perch Rs.500, 000.00

Attention deficit disorder: better location increment 25 %

Comparative value per perch Rs.625, 000.00

Area of site ( Perch ) 5

Comparative rating Rs. 3,125,000.00

Subsequent accommodations may be made for other factors, such as unnatural costs.

3. Contractor Method

The footing of contractor method is to propose that value of properly equivalent to the cost of raising the edifice together with the most of the site it is an unusual premise nevertheless, since value is determine non needfully by the constituent cost involve but purchase the sum which prospective purchases prepared to pay.

Used for insurance intents and for unusual or alone edifices that seldom comes onto the market. It involves ( ciphering the cost of reconstructing the belongings, as if new, including fees, etc, use a decrease for depreciation and wear and tear, add the site value ) .

4. Net income method

Used to deduce rental from net incomes from, for illustration a hotel. It involves set uping the gross net incomes for the belongings and subtracting from this all disbursals ( including net income ) , that are likely to be incurred by the renter. The residuary figure is the sum available for rent. It should be noted that cautiousness is required, as net incomes, for a figure of grounds, can be distorted.

5. Reinstatement method

In this method it requires appraisal of the cost of reconstructing the peculiar belongings and adding the value of the land where the belongings bases.

Undertaking 4.4

S-curves for building control


Figure-1 mentioned below illustrates one possible non-linear relationships derived from experience in some peculiar activity. The advancement on a new occupation can be compared to this historical record. For illustration, indicate A in Figure 1 suggests a higher outgo than is normal for the completion proportion. This point represents 40 % of work completed with an outgo of 60 % of the budget. Since the historical record suggests merely 50 % of the budget should be expended at clip of 40 % completion, a 60 – 50 = 10 % overproduction in cost is expected even if work efficiency can be increased to historical norms. If comparable cost overproductions continue to roll up, so the cost to finish will be even higher.