Cad Drawing

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LAB MANUAL

Publisher: MSPVL Polytechnic College,

Pavoorchatram.

M.S.P.V.L.POLYTECHNIC COLLEGE, PAVOORCHATRAM

(An Institution Accredited By NBA – AICTE, New Delhi For Mech, EEE, ECE & IT)

DEPARTMENT OF DEPARTMENT OF DEPARTMENT OF DEPARTMENT OF CIVIL EngineeringCIVIL EngineeringCIVIL EngineeringCIVIL Engineering

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CONTENTS

SL.NO TITILE PAGE NO.

1 Infiltration gallery (with one infiltration well, one straight Gallery pipe, one inspection well and one jack well

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2 Rapid sand filter 8

3 Septic tank with dispersion trench 10

3b Septic tank with soak pit 12

4 Biogas plant (Floating type) 16

5 R.C.C. square overhead tank supported by four columns 18

6 R.C.C. slab culvert with splayed wing wall 20

7 Two span pipe culvert 24

8 Two span tee beam bridge with square returns 25

9 Simply supported one way slab 30

10 Simply supported two way slab 32

11 Restrained two way slab 34

12 Singly reinforced beam (partially fixed) 38

13 Doubly reinforced beam (partially fixed) 40

14 Tee beams supporting continuous slab 42

15 Dog legged staircase 46

16 Lintel and sunshade 48

17 R.C.C. column with footings (square) 52

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1. INFILTRATION GALLERY

( With one infiltration well, one straight gallery pipe

one inspection well and one jack well)

Aim:

To draw the infiltration gallery using AutoCAD

software.

INFILTRATION GALLERY:

An infiltration gallery is essentially a porous

barrel placed with a pervious layer. water is collected

in the gallery and led to a well called jack well placed

at the river bank which acts as a sump . the water

from the well is pumped out .

The Infiltration gallery consists of a single or

double row of loosely jointed perforated pipes .

normally stone ware or concrete pipes are used. all

around the galley a medium of graded sizes of

aggregate is provided. the aggregate acts as a filter

and prevents the sand from entering the gallery.

the gallery is laid below the lowest ground

water level in the aquifer. the gallery should also be

located below the scour level of the river . the layers

above the gallery should not be disturbed even during

floods. because it acts as an initial filter. Manholes

are provided for inspection at required intervals.

INFILTRATION WELLS:

an infiltration well is a well sunk in a river or

stream bed. they are taken deeper than infiltration

galleries .

if masonry Walls are constructed then open

joints are provided . The top of the well is taken well

above the river bed and provided with an RCC slab.

The number of wells to be provided in the riverbed

depends on the demand of water . Water from the

infiltration wells is pumped to a common sump called

jack well.

Problem:

The particulars of an infiltration gallery are River bed level - +50.00m Inner Diameter of infiltration well - 3.80m Outer diameter of infiltration well - 4.70m River bank level - +53.70m Maximum flood level (MFL) - +52.90M Lowest summer water level (LSWL ) - +48.60M Invert level of stoneware pipe - +44.00m Diameter of stone ware pipe - 400m Length of one gallery - 60.0m

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Width of gallery - 2.20m Layer of filter media adjacent to the pipe - 150m

Next two layers are of 100 mm each

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(size of particle of filter media in each layer is

increased from outer to the inner layer)

Inner diameter of jack well cum pump house -

6m

Outer diameter of jack well cum pump house -

6.90m

Inter diameter of inspection well - 2m

Outer diameter of inspection well - 2.60m

Any more data required may be assumed

suitably . Draw the following views to a suitable scale.

1. general layout of the scheme showing infiltration

wells, infiltration galleries, inspection wells,

jackwell and pump house (not to scale )

2. Longitudinal section of infiltration well, one

straignt gallery, one inspection well and one

jackwell.

3. Sectional plan of infiltration well, gallery,

inspection well and jackwell.

4. Cross sectional details of infiltration gallery.

Assumptions:

1. inspection wells or manhole wells. are duge at

intervals of 50 to 60m.

2. Diameter of gallery pipe : 300mm to 450mm

3. Diameter of inspection wells : 1m to 2m

4. Diameter of infiltration wells : 2m to 6m

5. Depth of infiltration portion of infiltration well :5m

below L.S.W.L.

6. Minimum width of gallery :2m

7. Minimum depth of gallery : 2m below the lowest

summer water level.

8. Rate of infiltration for wells and galleries : 4500 to

6000 lit/m2/day.

Procedure:

1. switch on the computer

2. Load Auto CAD 2008

3. Setting units

( ii) set the unit as decimal & millimeter

4. Setting limits

5. Zoom – All

6. Using circle command draw Infiltration well

inspection well Jack well with pump house

7. for wall thickness use offset command

8. For filter media fill with hatch command

Result:

Thus the infiltration gallery are drawn using Auto

CAD 2008 software.

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2. RAPID SAND FILTER

Aim:

To draw the Rapid sand filter using AutoCAD

software.

Problem:

Following are the particulars of a rapid sand filter.

size of filler unit - 8.5mx5.7m

Sixe of inlet chamber - 1.0m x 5.7m

Wall thickness at top - 370mm

Wall thickness at bottom - 560mm

Thickness of foundation - 450mm

Diameter of main drain or manifold –380mm

Laterals - 80mm dia with

10mm strainer @ 150mm c/c

spacing of laterals - 300mmc/c

Slope of laterals - 1 in 50

Raw water inlet - 300mm �

Wash water drain pipe - 300mm�

Size of wash water trough - 275mmx375mm

Number of wash water trough- 3nos

Free board - 300mm

bottom of wash water trough is 500mm from the

surface of filter media (sand bed)

Any more data required may be assumed suitably.

Draw the following views to a suitable scale.

1. Plan of the filter unit showing drainage system .

2. longitudinal section of the filter unit .

3. cross section of the filter unit .

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command draw Rapid sand filter

7. Laterals are drawn using line and circle

command place the laterals in position using

copy or offset or array command.

Result:

Thus the Rapid sand filter are drawn using Auto

CAD 2008 software.

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3.[a] SEPTIC TANK WITH DISPERSIONTRENCH

Aim:

To draw the Septic tank with dispersion trench

using AutoCAD software.

Problem:

Following are the particulars of a septic tank with

dispersion trench for 150 users in a housing colony

Septic tank

Cleaning interval - 2 years

Length - 10.60m

Breadth - 2.70m

Depth of liquid - 1.15m

Free board - 0.45

Distance of partition wall from inlet end – 7.10

Dispersion trench

Number of trenches - 3

Length of trench - 30m

Width of trench - 1m

Depth below ground level - 900mm



1. sectional plan of septic tank and dispersion trench

2. longitudinal section of septic tank and dispersion

trench

3. cross section of dispersion trench

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command draw Septic tank with

dispersion trench .

7. using hatch command where our necessary

Result:

Thus the Septic tank with dispersion trench are

drawn using Auto CAD 2008 software.

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3.[b] SEPTIC TANK WITH SOAK PIT

Aim:

To draw the Septic tank with soak pit using

AutoCAD software.

Problem

Following are the particulars of a septic tank with

soak pit for 20users

Septic tank

Cleaning interval - 2 years

Liquid depth - 1.8m

Free board - 0.3m

Length of tank - 2.3m

Breadth of tank - 1.10m

Tank walls B.W. is c.m. 1:3200mm thick

Floor of tank in C.C . 1:2:3 200mm thick with a slope

of 1in 20 for collecting sludge

Diameter of inlet - 100mm

Diameter of T – Shaped outlet - 100,m

Precast of R.C.C cover slab 100mm thick

Diameter of ventilating pipe - 50mm

Size of distribution box - 0.75m

x0.75m

Soak Pit :

Inner diameter - 1.5

Depth below invert level of inlet pipe - 2m

Lining (walls) with dry open jointed B.W. 200mm

thick

Any more data required may be assumed suitably

Draw the following views to a suitable scale

1. Sectional plan of septic tank with soak pit empty /

soak pit filled

2. longitudinal section of septic tank with soak pit

empty filled

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line & circle command draw Septic tank

with soak pit .


Result:

Thus the Septic tank with soak pit are drawn using

Auto CAD 2008 software.

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Specifications

As per I.S. 2470 Part I and II

1. Dimensions: Septic tank shall have minimum width of 750 mm and a minimum depth of liquid as 1m below water level and a minimum liquid capacity of 1 cubic meter . The length of the tank shall be 2 to 4 times the width .

2. Sludge Digestion a) for Indian conditions, per capita contribution

of dry solids is assumed at 70gram per day . b) The capacity required for sludge digestion

assumed 0.033m3 per capita at 250 C c) volume of digested sludge assumed at

0.00021m3 per capita per day. 3. Detention period:

It may workout to 24 to 48 hours based on average daily flow.

4. pipe diameter : A minimum nominal diameter of 150 mm is recommended .

5. Septic tank may be constructed of brick work, stone work, concrete or other suitable materials.’

6. The effluent from the septic tank should be disposed off by seepage pit method or dispersion trench method.

Assumptions:

a) It is rectangular in plan, and for the walls in brick masonry the thickness is kept not less than 200mm.

b) For smaller tanks liquid depth of 1m is provided, for larger tanks it may be upto 1.8m. free board of 300 to 450mm is provided above the level of liquid for scum, gases, fixing of pipes etc.

c) An elbow pipe , usually T- pipe submerged to a depth of 150 – 250mm below the liquid level is

provided as inlet pipe. More number of inlet pipes may be provided for larger tanks.

d) Single elbow or T- shaped outlet pipe is provided. it should also be submerged at least 150mm below the liquid level. for every larger tanks, weir type outlet similar of settling tanks are provided

e) In smaller tanks one baffle of hanging types is enough and the baffle is usually placed 200 to 300mm from the inlet pipe and remains 250mm above 300mm below the liquid level. outlet baffle is provided only in large tanks, when weir type outlet is provided.

f) Usually R.C.C. slab with C.I manhole covers are provided.

g) Ventilation pipe of usually 75 to 100mm diameter of A.C. or C.I. is used for taking out the foul smells . Their tops are provided with cowls.

h) Larger tanks are provided with partition walls as the capacity of the first chamber is twice as that of the second chamber . suitable openings at a depth of 300mm from water level is also provided.

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4. BIOGAS PLANT

( FLOATING TYPE)

Aim:

To draw the Biogas plant using AutoCAD

software.

Specifications

The particulars of a floating type biogas plant are

Diameter of cylindrical drum – 2000mm

Height of digest well from foundation to cornice-

1350mm

Height of inlet and outlet at the digester wall –

700mm

height of the end of inlet and outlet from the bottom

of digester wall – 300mm

Height of drum - 1000mm

Thickness of foundation concrete for digester well –

150mm

Thickness of brick wall in cm 1:4 – 230mm

Thickness of partition wall – 150mm

Size of brick pillar at the centre – 230 x 230mm

Size of cornice - 75 x 300mm

Size of inlet tank – 750 x 750 x 600 mm

Size of outlet tank – 600 x 600 x600 mm

Diameter of inlet and inlet pipe – 100mm�

Any more data required may be assumed suitably .


1. Sectional elevation

2. Top plan

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line & circle command draw Biogas

plant


8. dotted lines are drawn using line type.

Result:

Thus the Biogas plant are drawn using Auto CAD

2008 software

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5. R.C.C. SQUARE OVER HEAD TANK

SUPPORTED BY FOUR COLUMNS

Aim:

To draw the R.C.C. Square over head tank

supported by four columns using AutoCAD software.

Problem:

The particulars of a R.C.C. square overhead tank

supported by four columns are

Size of the tank - 3300 x 3300 mm

Height of wall of the tank - 3m

Free board - 0.5m

Thickness of bottom slab - 150mm

Thickness of tank wall - 150mm

Thickness of cover slab - 100mm

Size of beam at top of column -250x 450 mm

Size of column - 250x250mm

Size of braces - 250x300mm

Height of column from G.L - 6M

Size of manhole - 600mmx600mm

Depth of water inside the tank - 2.5m

Depth of foundation below G.L. - 1200mm

Size of column footing - 1400x1400mm

Diameter of inlet, outlet and overflow pipes -200mm�

Diameter of scour pipe - 150mm

Diameter of vent pipe - 150mm



1. Sectional elevation

2. Plan

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command R.C.C. Square over head

tank supported by four columns are drawn.


8. Dotted lines are drawn using line type.

Result:

Thus the R.C.C. Square over head tank supported by

four columns are drawn using Auto CAD 2008

software

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6. R.C.C. SLAB CULVERTS WITH SPLAYED

WING WALLS

Aim:

To draw the R.C.C. Slab culverts with splayed

wing walls using AutoCAD software

Problem:

The following are the particulars for a R.C.C. slab

culvert with splayed wing wall.

Natural drain

Flows perpendicular to the centre line of roadway

Bed width - 2500mm

Bed level - +80.00m

Ground level - +80.50m

Side slop - 1:1

Embankment :

Road embankment

Top width - 5300mm

Top level - +82.7m

side slope - 1:1

Distance between the inner face of abutment -

2500mm

Deck slab - 250mm

Thickness of R.C.C. slab - +82.70m

Bearing on abutment - 450mm

Size of cement concrete bed block -

450x200mm

Length of bed block - 5300mm

Abutment:

Abutment with R.R. masonry in cm 1:5

top width - 600mm

Top level -82.45m

Bottom level - +79.50

External side vertical and earth side battered

Wing wall:

Wing wall with R.R. masonry in cm1:5 wing wall are

splayed at 450 with abutment

Top width 500mm

Same slope as for embankment to the top of wall from

+82.7m to +81.00m

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Bottom level +79.50m

Battered at earth side

Return wall

Return wall with R.R. masonry in cm 1:5

Top width - 500cm

Top level - +81.00m

Bottom level - +79.50m

Length parallel to the embankment - 2250mm

Foundation for walls:

Foundations in C.C. 1:4:8

Offset 300mm provided around all walls

Bottom level for abutment - +78.90

Bottom level for other walls - +79.20m

Clear width of roadway between kerb – 4000m

Width of Kerb - 200mm

Height of kerb above slab - 300mm

Road level at crown - +82.80

Parapet walls:

Parapet walls with R.R. masonry in cm 1:4

Width of wall - 450mm

Height of wall - 750mm

Length of wall - 3700mm

Thickness of cement concrete coping - 200mm

Talus or bed pitching and revetment along sides

Bed under the culvert and for sufficient length

towards the upstream and down stream sides and

also the sides of the drain are pitched with dry ribble

300 thick.

Wearing coat:

Wearing coat with bituminous surfacing for an

average thickness of 100mm over the deck slab and

over a course with rubble of thickness 250mm in the

remaining portion.

Guard stones:

Size of stone - 250mm x250mm

Height of stone - 450mm

Spacing of stone - 2000mm c/c

Any more data required may be assumed suitably .

Draw the following view to a suitable scale

1. Half plan at top and half at foundation level.

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2. Half sectional elevation along the centre line of

road and half front elevation.

3. cross section along the centre line of drain

To find out sections of abutment , wing wall and

return well.

Abutment

Top width - 600

Top level - +82.45m


Bottom width - 0.4 x h - 0.4(82.45 -79.5)

- 1180m - say 1300mm

Wing wall:

Section of wing wall is same as abutment section at

the abutment side (at +82.7 m level ) and the section

at the other side (at + 81.00m level) may be found

out as.

Top width -500mm

Top level at abutment side - +82.7m

Top level at other side - +81.00m


Minimum height of wing wall - (81.00 – 79.50m

- 1.5m

Bottom width at +81.00 level - 0.4(81.00-79.50)

- 600mm – say 700mm

Return wall:

Section of return wall is same as the section of wing

wall of +81.00m level.

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command R.C.C. slab culvert with

splayed wing wall are drawn.



Result:

Thus the R.C.C. slab culvert with splayed wing wall.

are drawn using Auto CAD 2008 software

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7. TWO SPAN PIPE CULVERT

Aim:

To draw the Two span pipe culvert using

AutoCAD software

Problem:

The specifications for a pipe culvert are

Road embankment and stream

Width of road - 4700mm

Bed level of stream - +50.00m

Road level - +52.10m

Thickness of road metalling – 250mm

Slop of earthen road embankment - 1:1

Pipes:

Number of pipes - 2

Diameter of cement concrete hume pipes – 1000mm

Thickness of the pipes - 50mm

Spacing of pipes - 1600 mm c/c

Pipe joints - collar joint in cm 1:2

Pipes seated in cement concrete 500m thick the concrete is laid 200mm below bed level.

Seating at ends have slope 1:1/2 on inner side

Width of seating at bottom - 2700mm

Width of seating at top - 3200mm

Details of retaining walls at ends of pipes

Top level - +52.15m

Top width - 500mm

Bottom width - 1100mm

Bottom level - + 49.25m

Front face vertical

Width of foundation concrete - 4200mm

Thickness of foundation concrete - 300mm

Parapet:

Length - 4200mm

Height - 750mm above road level

Thickness - 400mm from +52.150m

coping 100mm thick

Earth filling

Earth filling above hume pipes - 650mm

and over which road metals provided . Finally

surface dressing for 100mm thickness is provided

Bed pitching

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Rough stone pitching 450mm thick for 2000 mm

length both in u/s and D/s sides and a bell bund

from +51.75 to + 50.00m


Draw the following views in a suitable scale

1. Half plan at top and half at foundation level

2. Longitudinal section

3. Front elevation

4. Beading details of pipes

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command R.C.C. slab culvert with

splayed wing wall are drawn.



Result:

Thus the Two span pipe culvert are drawn using

Auto CAD 2008 software

8. TWO SPAN TEE BEAM BRIGE WITH SQUARE

RETURNS

Aim:

To draw the Two span tee beam briage with

square returns using AutoCAD software

Problem:

The following are the particulars of a two span T-

Beam bridge with square returns

Bed level - +25.00n

Full supply level - 26.40m

Top of foundation for allwalls - +24.70m

Bottom of foundation for allwalls - +24.70m

Offset for foundation concrete - 300mm

Road level - +27.50m

Top of parapet - +28.35m

Top of kerb - +27.65m

Width of kerb - 0.3m

Bed width of river - 7.6m

Span length - 3.5m

Width of linear water way - 7.0m

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Number of spans - 2

Top bund level - +27.15m

Abutment:

With C.R. masonry in cm 1:5

Top width - 600mm


Water face vertical length of abutment – 6.1m

bed bock - 0.6x0.6x0.15 in CC 1:3:6

Return Wall:


Length of return wall - 3.5m

Top width - 600mm


Front face vertical

Pier


Width - 600mm

Length of pier - 6.1m

Beam:

No. of tee beam - 2

Size of tee beam - 0.15 x0.3m

Slab:

Thickness of R.C.slab - 250m

Parapet:

Thickness - 300mm

Pillars for hand rails - 300x300mm

Coping for parapet wall and pillars 0.1 m thick

Size of R.C.C. vertical post for hand rails -

0.1x0.1x0.7m

Size of pipe for hand rails - 25mm�

Road way :

Width of road way - 4.4m

Width of road way in the approach - 5.4m

Revetment and bed pitching

Length of rough stone revetment and bed pitching

at U/S and D/S sides – 2000m

Thickness of revetment - 300m


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Draw the following views in a suitable scale

1. Half plan at foundation and half plan at top

2. Half sectional elevation along the road way and

half front elevation

3. Half cross section along the centre line of pier

and half section across the road.

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Two span tee beam bridge

with square returns are drawn.



Result:

Thus the Two span tee beam bridge with square

returns are drawn using Auto CAD 2008 software

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9. SIMPLY SUPPORTED ONE WAY SLAB

Aim:

To draw the Simply supported one way slab

using AutoCAD software

Problem:

The following are the particulars of a simply

supported one way roof slab

Clear span - 4m

Width of supported walls - 400mm

Total thickness of slab - 150mm

Clean cover - 15mm

Main reinforcement - 12mm Dia Fe 415

steel rods@ 280mm c/c

Distributors - 8mm dia Fe 415 steel rods

@ 220mm c/c

Anchorage and curtailment of reinforcement may be

adopted with standard values and any more data

required may be assumed suitably


1. Cross section of the slab showing reinforcement

details

2. Plan at bottom showing reinforcement

arrangements

3. Plan at showing reinforcement arrangements

4. Prepare bar bending schedule for 1m width of

slab

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Simply supported one way

slab are drawn.



Result:

Thus the Simply supported one way slab are drawn

using Auto CAD 2008 software

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10. SIMPLY SUPPORTED TWO WAY SLAB

(CORNERS NOT HELD DOWN)

Aim:

To draw the Simply supported two way slab(

corners not held down) using AutoCAD software

problem:

The following are the particulars of a simply

supported two way slab ,and in which corners are not

held down.

Size of the room - 4.3 x5.6m

Thickness of slab - 140mm

Width of supporting walls - 300mm

Clear cover - 15mm

Reinforcement along shorter span Fe 415 steel –

10mm @ 210mm c/c

Reinforcement along longer span - 8mm Fe 415

steel @ 220 mm c/c

Distributors at top for the main reinforcement in both

directions 8mm Fe 415 steel @ 290mm c/c

Anchorage and curtailment of reinforcement maybe


required may be assumed suitable.


1. Section along shorter span showing

reinforcement details

2. Section along span showing reinforcement

details

3. Plan showing the reinforcement details at

bottom and at top

4. Prepare a bar bending schedule .

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Simply supported two way

slab( corners not held down) are drawn.



Result:

Thus the Simply supported two way slab( corners not

held down) are drawn using Auto CAD 2008

software

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11. RESTRAINED TWOWAY SLAB

(CORNERS HELD DOWN)

Aim:

To draw the Restrained two way slab

(corners held down) using AutoCAD software

Problem

The following are the particulars of a Simply

supported two way slab and in which corners

are held down.

Size of room - 7.00 x 5.00 m

Width of support – 300 mm

Thickness of slab – 150 mm

Clear cover -15mm

Reinforcement in the middle strip.

Reinforcement along shorter span

12mm Fe415 steel @100mm c/c

Reinforcement along longer span

12mm Fe 415 steel @ 150mm c/c

Reinforcement in the edge strips

12mm Fe 415 steel @160mm c/c. along

both spans.

Distributors at top for the main

reinforcement 12 mm. Fe415 steel @ 160 mm

c/c.

Torsion reinforcement

Both at top and bottom 10mm Fe 415 steel @

110mm c/c in both directions forming a mesh.

Anchorage and curtailment of reinforcement may

be adopted with standard values and any more

data required may be assumed suitably.


1. Section along shorter span middle strip

showing reinforcement details

2. Section along longer span middle strip

showing reinforcement details.

3. Plan showing arrangement of reinforcement at

bottoms.

4. Plan showing arrangement of reinforcement at

top.

5. Prepare a bar bending schedule.

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Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Restrained two way

slab (corners held down) are drawn.



Result:

Thus the Restrained two way slab (corners held

down) are drawn using Auto CAD 2008 software

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12. SINGLY REINFORCED BEAM

(PARTIALLY FIXED)

Aim:

To draw the Singly Reinforced [beam

(partially fixed using AutoCAD software

Problem:

The following are the particulars of a Singly

reinforced partially fixed beam.

Clear span - 5000 mm

Width of supports - 300 mm

Size of beams - 300 x 550 mm

Clear cover to steel rods - 25 mm

Main reinforcement (tensile) - 16 mm Fe 415 steel -

6Nos.

Hanger rods - 12 mm Fe4l5steel

2 Nos

Shear reinforcement - Two legged stirrups

8mm Fe 415 steel @

150mm

Reinforcement at top at supports for negative

moment 16mm Fe41 5 steel 3 nos for a length of

0.11 or Id whichever in greater and anchored

sufficiently.

Anchorage and curtailment of reinforcement

may be adopted with standard values and any more

data required may be assumed suitably.


1. Longitudinal section of the beam showing

reinforcement details.

2. Top and bottom plan showing arrangement of

bars.

3. Cross sectional view of the beam at mid span and

at supports.

4. Prepare a bar bending schedule. Procedure:

1. switch on the computer 2. Load Auto CAD 2008 3. Setting units

( ii) set the unit as decimal & millimeter 4. Setting limits 5. Zoom – All

6. Using Line command Singly Reinforced are

drawn. 7. using hatch command where our necessary 8. Dotted lines are drawn using line type.

Result:

Thus the Singly Reinforced are drawn using Auto

CAD 2008 software

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13. DOUBLY REINFORED BEAM

(PARTIALLY FIXED)

Aim:

To draw the Doubly reinforced beam (partially

fixed) using AutoCAD software

Problem

The following are the particulars of a doubly reinforced

partially fixed beam.

Clear span - 4500mm

Width of supports - 300 mm

Size of beam - 300x500mm

Tensile reinforcement - 16 mm Fe 415

Compressive reinforcement - 16 mm Fe 415

steel 3 Nos.

Shear reinforcement - 8 mm Fe 415

Steel 2 legged stirrups at 1pLcIc upto a distance of

25, mm from the face of supports. on each side and at 260

mm c/c the remaining portion.


adopted with standard values and any more data required

may be assumed suitably.

Draw the following views to suitable scale.

1. Longitudinal section J/he beam showing reinforcement

details.

2. Top and bottom plans showing arrangement of bars.

3. Cross sectional view of the beams at mid span and at

supports.

4. Prepare a bar bending schedule.

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Doubly reinforced beam

(partially fixed) are drawn.



Result:

Thus the Doubly reinforced beam (partially fixed) are

drawn using Auto CAD 2008 software

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14. TEE BEAMS SUPPORTING CONTIUOUS SLAB

Aim:

To draw the Tee beam supporting continuous

slab using AutoCAD software

Problem

The following are the particulars of a continuous one way

slab over Tee beams.

Clear size of room - l5mx5m

Spacing of Tee beams - 3m c/c

Depth of Tee beams - 450 mm (over all)

Breadth of web or rib - 250 mm

Width of support - 250 mm

Thickness of slab - 120mm

Reinforcement in slab

Main reinforcement for positive moment at end

spans 10 mm Fe 415 steel @300 mm c/c.

Main reinforcement for negative moment at support

next to end support 10 mm Fe 415 steel at 290 mm c/c.

Main reinforcement for positive moment at Interior

span 10mm Fe 415 steel @300mm c/c.

Main reinforcement for negative moment at Interior

support 10 mm Fe 415 steel 230 mm c/c.

Distribution 8 mm Fe 415 steel 340 mm c/c.

Reinforcement in Tee Beam

Main (Tensile) reinforcement - 20 mm Fe 415

steel 5 Nos.

Hanger rods - 12 mm Fe 415

steel 2 Nos.

Shear reinforcement - 2 legged stirrups

8mm Fe 415 steel

@25OmmcIc.

Reinforcement at top at support 16 mm Fe 415 steel

2 Nos for a length 0.1 l or Ld whichever in greater and

anchored sufficiently.


adopted with standard values and any more data required

may be assumed. suitably.

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1. Lay out of beams

2. Cross section of beam and slab for end span and interior

span showing reinforcement details.

3. Plan showing reinforcement details at bottom and at top.

4. Longitudinal section of Tee beam.

5. Cross section of beam at mid span and at supports.

6. Prepare a bar bending schedule for all spans except beam

portion for 1 m width of slab.

Procedure:



3. Setting units


4. Setting limits

5. Zoom – All

6. Using Line command Tee beam supporting

continuous slab are drawn.



Result:

Thus the Tee beam supporting continuous slab

are drawn using Auto CAD 2008 software

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15. DOG LEGGED STAIRCASE

Aim:

To draw the dog legged staircase using

AutoCAD software

Problem

The following are the particulars of a dog legged staircase.

Clear size of staircase room - 5.9 m x 3.4 m

Width of supporting walls - 230 mm

Vertical distance between the floors - 3.3 m

Width of flight - 1600mm

Width of landing - 1600 mm

Number of flights - 2

No. of riser in each flight - 11

No. of treads in each flight - 10

Rise - 150 mm

Tread - 270 mm

Thickness of waist slab - 250 mm

Main reinforcement 10 mm Fe 415 steel @ 120 mm c/c

Distributors - 8mm Fe 415 steel @ 160 mm c/c

50% of the main reinforcement are provided at the

bottom of landing slab and extended to the top of waist slab

for a length of 0.151 or Ld whichever is greater.

Anchorage and curtailment of Reinforcement may b

with standard values and any more data required may be

suitably.


1. Plan and elevation of dog legged stair.

2. Section of waist slab (First flight)

3. Section of waist slab (Second flight)

4. Details of steps.

5. Prepare a bar bending schedule

Procedure:

1. switch on the computer 2. Load Auto CAD 2008 3. Setting units

( ii) set the unit as decimal & millimeter 4. Setting limits 5. Zoom – All 6. Using Line command dog legged staircase are

drawn. 7. using hatch command where our necessary 8. Dotted lines are drawn using line type.

Result:

Thus the dog legged staircase are drawn using Auto

CAD 2008 software

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16. LINTEL AND SUNSHADE

Aim:

To draw the Lintel and sunshade

using AutoCAD software

Problem

The following are the particulars of a lintel

with sunshade.

Clear span of lintel - 2 m

Bearing on either side - 300 mm

Size of lintel - 300 x 200

mm

Width of brick wall - 300 mm

Width of Sunshade - 0.9 m

Thickness of Sunshade -

100mm

at support and 50 mm at free end

Reinforcement details:

Lintel - 12 mm Fe 415 steel

(5 Nos.)

Main (tensile) reinforcement --10mm

Fe4l5steel 2 Nos.

Shear reinforcement - Fe4l5steel8mm

2 legged stirrups

175 mm c/c

Sunshade

Main reinforcement - Fe 415 steel 10

mm @

230 mm c/c.

Distributors - Fe 415 steel 8

mm

300 mm c/c

Anchorage and curtailment of

reinforcement may be adopted with

standard values and any more data

required may be assumed suitably

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Draw the following views to a suitable

scale.

1. Longitudinal section of lintel.

2. Cross section of lintel and Sunshade at

mid span and at support.

3. Plan of lintel and Sunshade.

4. Prepare a bar bending schedule for the

lintel and Sunshade.

Hanger rods

Shear reinforcement

Procedure:

switch on the computer

Load Auto CAD 2008

Setting units


Setting limits

Zoom – All

Using Line command R.C.C. slab culvert with splayed wing wall are drawn.

using hatch command where our necessary

Dotted lines are drawn using line type.

Result:

Thus the Lintel and sunshade are drawn using Auto CAD 2008 software

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17. R.C.C. COLUMN WITH FOOTING

(SQUARE)

Aim:

To draw the R.C.C. column with footing using

AutoCAD software

Problem

The following are the particulars of a R.C.C. square

column with square footing.

Size of column - 400 mm x 400 mm

Clear cover - 40mm

Size of footing - 2.4m x 2.4m Depth of footing - 600mm at column face and 150mm at ends Bottom cover - 50mm Cover at side - 75 mm Reinforcement details Column Column Longitudinal reinforcement - 22 mm Fe 415 steel 8 Nos. Lateral ties - 8 mm Fe 415 steel _____ @ 280 mm c/c. Footing

16 mm Fe415 steel 16 Nos in each direction



required may be assumed suitably.


1. Plan of column with reinforcement details.

2. Sectional view of column with footing.

3. Plan of footing showing reinforcement details.

4. Prepare a bar bending schedule for column and

footing (for I m height of column)

Procedure:

switch on the computer

Load Auto CAD 2008

Setting units


Setting limits

Zoom – All

Using Line command R.C.C. slab culvert with splayed

wing wall are drawn.

using hatch command where our necessary

Dotted lines are drawn using line type.

Result:

Thus the R.C.C. column with footing are drawn

using Auto CAD 2008 software

Documents

Cad Drawing