IS-1139-1966 - Odishapanchayat.gov.in

frizzflowerUrban and Civil

Nov 29, 2013 (3 years and 6 months ago)

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WELCOME TO ALL

PRESENTATION


ON

ESTIMATE BY GROUP
-
II

ESTIMATE (GROUP
-
II)

CC ROAD & BUILDINGS

Sl. No.

Name of the Officials

Desiganation

District

Block

Phone No

E
-
mail ID

1

R.K
Behera


A.E.

Keonjhar

Saharpada

9437793610

behera.rajkumer327@gmail.com

2

J.K.Mishara

J.E.

Mayrbhanj

Badasahi

9937579252

jkmishra03@yahoo.co.in

3

Dillip

kumar

Behera

J.E.

Cuttack

Narasinghpur

9437353342

beheradillip2008@gmail.com

4

Damodar

Sahu

J.E.

Nayagarhi

Nuagaon

9437145984

damodar_1969@rediffmail.com

5

Rakesh

Sahu

C.P.

Gajapati

Nuagarh

9439323503

rakeshkumarsahu.2004@gmail.com

6

Pratap

Kumar
Nayak

GPTA

Ganjam

Patrapur

9437277498

prateeknayak1012524@yahoo.co.in

7

Saroj

Kumar
Panigrahi

A.E.

Bargarh

Bheden

9861296252

psaroj91@yahoo.com

8

Madhumita

Mishra

JE

Jharsuguda

Jharsuguda

9937712589

madhu2003.2010@rediffmail.com

9

Biswa

Mohan
Patnaik

J.E.

Puri

Delanga

9438662227

biswamohan_1968@rediffmail.com

10

Ashok Kumar
Panigrahi

Estimator

Koraput

DRDA

9437182070

ashok_1997.2010@rediffmail.com

Process

for

preparing

any

estimate

in

excel

sheet
:



Before

going

to

prepare

any

estimate

on

excel

sheet,

the

study

of

the

drawing

are

very

much

vital

for

its

visualization

as

regards

to

length,

breadth

and

height

starting

from

foundation

to

finishing

work

in

case

of

Building

work
.

In

case

of

road

work,

similar

stages

needs

to

be

adopted

for

visualizing

length,

breadth
.

Plan

&

section

along

with

foundation

details

is

required

for

any

kind

of

work
.

Now,

in

the

excel

sheet,

the

estimate

needs

to

be

prepared

in

a

sequence

manner

such

as

starting

from

earth

work

in

foundation

to

finishing

work

to

arrive

at

the

quantities
.

The

total

quantity

of

individual

items

of

work

is

derived

in

separate

sheet

as

called

as

Abstract

of

estimate
.


DETAILED SHEETS


1 . COVER PAGE


2. REPORT


3. DATA SHEET / QUARRY CHART


4 ABSTRACT OF ESTIMATE


5. DETAILED ESTIMATE


6. LEAD STATEMENT


7. ANALYSIS OF RATES


8. MATERIALS & LABOUR STATEMENT


9. T.S & FS


10. DRAWING





Construction of Building

Building

1.
Materials

A.
Cement

(i)
Ordinary Portland Cement (IS
-
269
-
1976)

(ii)
Rapid Hardening Portland Cement (IS
-
8040
-
1978)

(iii)
Portland slag Cement (IS
-
455
-
1976)

(iv)
Portland Pozzolana Cement (IS
-
1489
-
1976)

(v)
White Cement

(vi)
Coloured Cement

(vii)
Hydrophobic Cement (IS
-
8043
-
1978)


Setting time of Cement

(i)
Initial Setting time
-
Not less than 30 min.

(ii)
Final setting time
-

Not more than 600 min.


B. Reinforcement



The reinforcement shall be any of the following :
-

(i)
Mild steel & medium tensile steel bars (IS
-
432
-
1966)

(ii)
Hot rolled deformed bars (IS
-
1139
-
1966)

(iii)
Cold twisted bars (IS
-
1786
-
1979)

(iv)
Hard
-
drawn steel wire fabric (IS
-
1566
-
1967)

(v)
Rolled steel made from structural steel (IS
-
226
-
1975)

Permissible stress in steel Reinforcement

Sl
No

Type of stress in
steel
reinforcement

Permissible stress in N/mm2

M.S. bar
Grade
-
I (IS
-
432
-
1966/
Deformed M.S.
bar (IS
-
1139
-
1966)

Medium Tensile
steel (IS
-
432 part
-
1,1966 or Defend
medium tensile steel

(IS
-
1139
-
1966)

HYSD bars
IS
-
1139
-
1966
or IS
-
1786
-
1979 (Grade
-
Fe
-
415)

1

Tension (6 st)

a)Up to 20mm

b)Over 20mm


140

130


190

190


230

230

2

Compression in
column bars (sc)

130

130

190

N.B. We are using HYSD bar of Fe
-
415 grade & Fe
-
500
grade of TATA TISCON & SAIL BRAND


R.C. Concrete


Grade Designation

Specified characteristic
compressive strength at 28 days
(N/mm2
)

M
-
10 (1:3:6)

10

M
-
15 (1:2:4)

15

M
-
20 (1 :1.5:3)

20

M
-
25 (1:1:2)

25

M
-
30 (1:1:1)

30

Note 1
-

In the designation of concrete mix, letter M refers to the mix & the number to
the specified characteristic compressive strength of 15 cm cube at 28 days expressed in
N/mm2.

Note 2
-

Grade of concrete lower than M
-
15 shall not be used in reinforcement concrete.

Requirement of water in concrete per 50 kg of
cement

Grade of Concrete

Quantity of Water per 50 kg
of Cement (max)

M 7.5 (1:4:8)

45 lit

M 10 (1:3:6)

34 lit

M 15 (1:2:4)

32 lit

M 20 (1: 1 ½:3)

30 lit

Removal of Formworks


In

normal

circumstances

&

where

ordinary

Portland

Cement

is

used,

forms

may

generally

be

removed

after

the

expiry

of

the

following

period
.


Wall, column & vertical faces of all
structural members

24 to 48 hrs as may be decided
by the Engineer
-
in
-
charge

Slab (Props left under)

3 days

Beam soffits (Props left under)

7 days

Removal of props under slab

i.
Spanning up to 4.5 m

ii.
Spanning over 4.5 m


7 days

14 days

Removal of props under beams & arches

i.
Spanning up to 6 m

ii.
Spanning over 6 m


14 days

21 days

2. General Design Requirements


A.
Load & Forces



In structural design, account shall be taken of dead, live & wind loads
& forced such as those causes by earthquake & effects due to shrinkage,
creep & temperature etc. where applicable.

Unit Weight of some of the Building Materials


Materials

Unit Weight

A.C. Sheets

137 N/m2

Bricks (broken)

14.2 Kn/m3

Bricks (common)

16 Kn/m3

Cement (ordinary)

14.1/m3

Cement Mortar

20 Kn/m3

Cement Concrete (plain)

24 Kn/m3

Cement Concrete (reinforced)

25 Kn/m3

Stone (granite)

24.5 Kn/m3

Stone (marble)

26.5 Kn/m3

Timber (Sal)

5.1 Kn/m3

Timber (Teak)

6.25 Kn/m3



Dead Loads


It should be calculated on the basis of unit weight of
the materials as specified for construction.


Live Loads & Wind Loads


It should be assumed in accordance with IS
-
875
-
1964.


Earthquake Forces


It should be calculated in accordance with IS
-
1893
-
1975.



Foundation


Types of foundation


i. Continuous stepped footing for walls.


ii. Isolated footing for columns.


iii. Combined footing for walls and columns.


iv. Strap footing for columns.


v. Mat or raft foundation.


vi. Pile foundation for columns in black cotton soils.



Now
-
a
-
days

we

are

mostly

constructing

column

structure

for

which

we

are

going

for

isolated

reinforced

concrete

footing
.

The

size

of

the

footing

depends

on

the

height

of

the

buildings,

nos

of

column

to

be

provided

in

the

building

&

most

important

for

the

safe

bearing

capacity

of

the

soil
.

So

the

size

of

the

footing

should

be

found

out

considering

the

dead

loads,

live

loads

wind

and

seismic

loads

&

safe

bearing

capacity

of

soil
.

Thickness at the edge of the footing shall not be less than 150 mm.

Column

i.
Short

Column

:


When

the

ratio

of

the

effective

length

to

its

least






lateral

dimension

in

less

than

or

equal

to

12

it

is






called

short

column
.

i.
Long

Column

:


If

the

ratio

of

effective

length

to

its

least

lateral






dimension

is

more

than

12
,

then

it

is

called

long







column
.


Longitudinal

Reinforcement


i.
The

cross

sectional

area

of

longitudinal

reinforcement

shall

be

not

less

than

0
.
8
%

nor

more

than

6
%

of

the

gross

cross

sectional

area

of

the

column,

ii.
The minimum nos. of longitudinal bars provided in a column shall be 4
in rectangular column & 6 in circular column.

iii.
The bar shall not be less than 12 mm in dia.

iv.
Spacing of longitudinal bars measure along the periphery of the column
shall not exceed 300mm.




v. The min. size of bar of the base jally is to be not less than the min.dia of
the longitudinal reinforcement.



Spacing of Transverse Link (Rings or Lateral ties)


This

shall

not

exceed

the

least

of

the

following
.

a)
The

least

lateral

dimension

of

the

column

b)
Sixteen

time

the

dia

of

the

smallest

longitudinal

reinforcement

in

the

column
.

c)
48

times

the

dia

of

transverse

reinforcement
.

Dia

of

Transverse

Links


The

dia

of

transverse

links

shall

not

be

less

than
-

a)
one
-
forth

the

dia

of

the

largest

longitudinal

bar

b)
5

mm

Cover


The

minimum

cover

to

the

column

reinforcement

shall

be

40
mm

or

dia

of

longitudinal

bar

which

ever

is

greater
.


However

in

case

of

columns

of

minimum

dimension

of

200
mm

or

under

whose

reinforcement

bar

does

not

exceed

12
mm,

a

cover

of

25

mm

may

be

used
.

T
-
Beam & L
-
Beam

A)
T
-
Beam :
When flange of the beam present on both side of
the beam it is called T
-
Beam.

B)
L
-
Beam :
When flange of the beam present only on one side it
is called L
-
Beam.

C)
Depth of the Beam :

May betaken as 1/12 to 1/20 of the span
or 1” per 1’0” width.

D)
Width of the Rib :

The width is generally between 1/3 & 2/3
of the depth of the rib.

E)
Maximum Reinforcement :

Max. area of tension
reinforcement shall not exceed 0.04bd.
i.e (4%x breadth x depth)

F)
Side Face Reinforcement :

Where the depth of the web
exceeds 750mm, side reinforcement shall be provided along
the two faces which shall not be less than 0.1% of the web
area.

g)
Spacing of Reinforcement


The following shall apply for spacing of bar.

1.
The horizontal distance between two main reinforcement
bars shall be not less than the greatest of the following.

i.
The dia of bar if the dias are equal.

ii.
The dia of the larger bar if the dia are un
-
equal.

iii.
5mm more than the max. size of the coarse aggregate.

2.
Where there are two or more rows of bars, the bar shall be
vertically in line & the min vertical gap between the bars
shall be greatest of the following.

i.
15 mm

ii.
2/3 of max size of the aggregate.

iii.
The max size of the bar.

Cover to Reinforcement


Not less than 25 mm nor less than the dia of the longitudinal
reinforcement.

Slab

a)
Thickness of Slab :
Minimum thickness of slab is 100mm (80mm in case
of inclined slab)

The following Table gives the Maximum values of the ratio of the span to
depth.

Types of Slab





Ratio of span to depth

i)
Simple supported & spanning in


one direction






30

ii) Continuous & Spanning in one direction



35


iii) Simple supported & spanning in two direction


35


iv) Continuous & spanning in two direction


40

v) Cantiliver slabs






12

-------------------------------------------------------------------------------------------------


Effective Span:


Lesser of the following

i.
Distance between centre of bearing

ii.
Clear span + effective depth
.

c. Reinforcement

i.
The min. reinforcement in either direction shall be 0.15% of the
total Cross
-
Sectional Area (0.12% in case of HYSD bars)

ii. The reinforcement constituting the main bar shall be based on
the max bending moment.

iii. The pitch of the main bar shall not exceed

a)
3 times the effective depth of the slab.

b)
450mm.

iv. The pitch of the distribution bars shall not exceed the
following.

a)
5 times the effective depth of the slab.

b)
450mm.

d.
Cover to Reinforcement.


The minimum cover to outside of the main bar shall not less
than the following.

i.

15mm

ii.

Dia of the main bar.



Bar Bending

i.
Discontinuous edge :
-

Alternative bars should
be bent at 1/7
th

of the effective span.

ii.
Continuous edge :
-

Alternate bars should be
bent at 1/5
th

of the effective span & continue
up to 1/4
th

of the effective span of the next
room.

iii.
The alternative straight bar should continue
up to 1/10
th

of the effective span of the next
room.

Torsion Reinforcement


If

the

corners

of

the

slab

held

down,

then

torsion

reinforcement

is

provided

in

both

directions

parallel

to

sides

at

top

&

bottom

up

to

distance

of

1
/
5
th

of

shorter

span

as

follows

:
-

i.
Two

edge

discontinuous

-
3
/
4
th

of

the

area

of

main

reinforcement
.

ii.
One

edge

discontinuous



3
/
8
th

of

the

area

of

main

reinforcement
.



Thank You……