General specification in constriction

 


                                      General Specifications of civil works

General specification of building works is earth work and excavation lintel chajja masonry works and putty paint and finishing works, all technical specification given bellow.

1.       Earth work in Excavation:

Quantity is measured in cubie meters comics (m3) = L X B X D

Length L - Plan, B, D – Sectional details.

2.       Lime Concrete / Cement Concrete in foundation:

Quantity is measured in cubic meter cum (m3) = L X B X D

(length) L – Plan, B – width of trench, h – section (height)


3.       Brick/Stone Masonry work in Foundation & plinth:

Quantity is measured in cubic meter but the quantities are taken separately at different stages of foundation a finally all the quantities are summed up (added up) to arrive at final quantities.

Ø  This is taken up separately because the quality / quantity of construction in foundation is different from quantity of masonry work else any where.

Ø  No deductions are required for masonry work in foundation.

4.       D.P.C (Damp Proof Coarse):

Quantity is measured in square meters (sq. m) (m2 = L X B)

B = Width of plinth

Ø  D.P.C is generally provided between plinth and super structure wall to prevent entry of dampness into super structure work.

Ø  Generally, the width of DPC work is equal to width of super structure wall. The length is estimated as if there is no openings in building and deductions are made for door openings where DPC layer is not provided.

Gross quantity = L X B

Deductions (Doors) = - m2

5.       Masonry work in super structure:

(Either in Brick Masonry/ Stone Masonry).

 Quantity is measured in cubic meter

 cum (m3 = L x B x H)

 Assuming as if there are no openings in the building this will give gross quantity.

Ø  To arrive at net quantity deductions for doors, windows and ventilators all kinds of openings shall be made.

6.       R.C.C Work in Lintel/ Chajja/ Sunshade:

Quantity is measured in cubic meter.

Lintel:

 [ l = length of the opening + bearing on either side]

Ø  Generally bearing is taken between 10 cm – 15 cm.

Ø  Band lintel: Lintel is provided throughout the building we do not required bearing.

Ø  Isolated Lintel: Lintel is provided in openings. L = length of opening + bearing on either side.

Chhajja:

Sunshade provided in verandah.

Chajja is nothing but cantilever projection provided in verandah.

Ø  Quantity is calculated in cubic meter (cum) (m3)

Length is measured from the plan and height is taken as average thickness.

Sunshade:

Quantity is estimated in similar in similar way like as chajja but length of sunshade = length of lintel.

7.       R.C.C Work in Roof:

Ø  The quantity of R.C.C work is estimated in cubic meter.

Quantity = plan area of building x thickness of roof slab

Ø  Steel quantity in R.C.C work for beams = 0.8 – 1% of total value of R.C

For roof slab = 1% to 2% of total value of R.C

For columns = 2% to 5% of total value of R.C

For foundation = 0.5% to 5% of total value of R.C

For foundation it is very low because it takes only compressive forces.

8.       Plastering:

The quantity of plastering work is carried in square meter by mentioning thickness in description column.

Ø  While calculating the quantity of plastering in super structure we assume as if there are no openings in a super structure wall. celling plastering thickness 6mm and interior plastering 12mm , and external plastering 15mm to 18 mm . external plastering may be requirement two coted as per engineer in charge. if flash celling is there no need for plastering 

9.        White washing:

Quantity is measured in square meter (sq. m) by mentioning n coasts in description column.

Ø  The quantity is same as that of quantity calculated for plastering.

10.   Distempering:

 Distemper is also known as paint . Quantity is measured in square meter. Quantity is same as that of quantity in white washing.

distemper generally for interior used . its low cost compere to paint . distemper is generally light color

putty work : putty give smooth surface and good looking .thickness of putty generally 2mm . irs also measured in square meter . after putty sand paper used compulsory

11.   Wood work:

Wood work in door frames & window frames is measured in cubic meter (cum)

Wood work in door shutters & window shutters is measured in square meter (sq. m) by mentioning thickness in descriptive column.

12.   Brick Walls whose thickness is less than 20 cm is measured in sq. m (m2) greater than 20 cm – cubic. m(m2)

Ø  Stone masonry whose thickness is less than 15 cm is measured in sq. m

Ø  Greater than 15 cm – cubic method

13.    Flooring:

Ø  It consists of two layers

i)                    Base coarse

ii)                  Top coarse

Ø  They are laid one above the other.

Ø  Base coarse is provided between plinth to plinth. Quantity of base coarse is measured in square meter mentioning its thickness in description column m2 = LX

Ø  Top Coarse is provided between S. S wall to S. S wall. Quantity is measured in square meter (sq. m) by mentioning its thickness in description column m2 = L x B

14.   Plinth Filling:

They empty space between plinth walls inside the building filled with any type of cheap material such as moorum / sand /soil.

Ø  Its quantity is measured in cubic meter (cum) by multiplying plan area to plinth level with height of filling.

Ø  The height of plinth filling = plinth level – ground level – thickness of base coarse in flooring.

INDIAN STANDARD CODE

Is 1200 is the code book used in which various measurements of buildings & civil engineering works are present. Is 1200 consists of various parts for different items of works.

IS 1200 PART

               Details present according to various items of works

01

Method of measurement of building & civil engineering works – earthwork

10

Ceiling & Lining

11

Paving, floor finishes, Dado & skirting

13

White washing, color washing, distempering and painting of building surface

14

Glazing

15

Painting, polishing, varnishing

16

Laying of water & sewer lines including appurtenant items

17

Road works including air field pavements

18

Demolition & dismantling

02

Concrete works

20

Laying of gas & oil pipelines

21

Wood work & joinery

22

Materials

23

Piling

24

Well foundation

 

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