CONSTRUCTION AREA CALCULATION

CIVIL CONTRACTOR AREA:

Detailed Steps:

A.  Drawing Preparation ( Auto CAD):

1. First necessary thing is to check all the plans received are proper or not. If not then ask for the revised drawings. To calculate construction area following drawings are must:

a.    Basements (If Any).

b.   Ground floor/Stilt floor.

c.    Podium / parking floors / Swimming Pool and Health club levels.

d.   Typical floors.

e.    Refuge floor ( for buildings with more than 7 storey).

f.    Terrace floor ( for OH & LMR locations).

g.   Sections (through lift shafts, staircase, balconies and toilets) & Elevations.

2.      No duct or shaft deduction should be done for ground floor, if building is without basement.     

3.      If basements are there no duct/shaft deductions for lower most basement. But see that the

duct /shaft are running through other upper basement or not.

4.      There should always be a Polyline giving outer area as well. (Periphery).

Polyline should have a visible thickness and colour .

5.      Flower beds, Service slabs, utility slab should be worked out separately (P line to be drawn).

6.     For Plumbing or Electrical ducts (i.e service ducts), area of pipes cut-outs should be deducted.

       

       7.        No deductions for staircase well & lift shafts to be done.

        8.       For Contractor's area, OHWT & LMR bottom should be given (i.e. every covered area). 

B.  Contractor's construction area – Objective of working out this area is to release Civil labour (RCC work) contract built-up area basis.

       

Sr. No.		Floor description	% allotted for the Contractor's Construction area
1		Basement (if any) incl. Ramp	150%
		Ramp	150%
2		Ground Floor
		Stilt area/parking area	50%
		Entrance lobby or other rooms viz. meter room , control room,etc.	100%
		Podium area- Parking area (within building foot print)	50%
		*Podium floors if exists outside	100%
3		Typical floor
		Void – Cutout , Service duct Cut-outs	0%
		Flower bed / planters / balconies ( if more than 1.2 m wide )	100%
		service area/slab –	50%
		Utility slab-	50%
		Other usable area- (Such as flats in case of Residential and Shops/ offices in case of commercial bldg. Plus staircase, lift lobbies,etc. )	100%
4		Refuge floor-
		Refuge flats area	60% - 65%
		Rest area of refuge floor if flats/offices are there –	100%
		Void – Cutout , Service duct Cut-outs	0%
		Flower bed / planters / balconies ( if more than 1.2 m wide )	50%
		Service slab	50%
		Utility slab-	50%
5	Terrace Floor
	Uncovered terrace		0%
	Covered terrace (Staircase headroom, etc.)		100%
6	LMR bottom		100%
7	OHWT bottom		100%

STRUCTURAL CONSULTANT AREA:

           Generally structural consultant is paid on the built-up area basis as per the contract, though drawing preparation process is same for calculation of construction area for Structural consultant's fees.

There area some points which are followed in the contractual terms and conditions.

i)     Area covered above with a roof will be paid 100%.

ii)   Opening in slabs for lift shafts / service ducts, cut-outs for lift well shall be deducted.

iii)    Boxes, Niches, Elevation Chajjas, Planter upto 1.2 m wide should not be considered in area calculations.

iv)    Lift machine room, OHWT, UGWT, Septic Tank, Sewerage treatment plant, pump rooms, security Cabins, electrical substation if exist outside of the building area then only will be charged separately. Otherwise will not be paid extra.

v)      Compound wall with MS or CI gate columns, building’s entrance canopies, structural design of Landscaping feature and top elevation pyramids / dome etc. should not be considered in the area calculation.

ARCHITECTURAL CONSULTANT AREA:

This Construction area is worked out to release fee structure for Architect’s contract.  

Like structural consultant, Architect is also paid on the built-up area basis as per the contract.

It depends upon the terms specified for the fees of various architects. But there are some generalized areas norms.

i)        Deduction same as stated above for contractor's construction area.

ii)      Flower Bed – service /utility slab – 50%

iii)    Refuge area – 100%

iv)    No uncovered area to be given

v)      No terrace or above terrace floor area to be given (Covered or uncovered)

vi)    Compound wall with MS or CI gate columns, building’s entrance canopies, architectural design of Landscaping feature and top elevation pyramids / dome, security room, any other services room outside of the building area should not be considered in the area calculation.

vii)  Boxes or elevation features are not considered in area calculations.