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Design and drawing of RC Structures CV61

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Plinth area to be limited to 450 m2 (15m x 30m) Height of each column : 3.5m ... Plinth beam 300 mm x 400 mm all-round 0.6m above ground level ... – PowerPoint PPT presentation

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Title: Design and drawing of RC Structures CV61


1
Design and drawing of RC StructuresCV61
Dr. G.S.Suresh Civil Engineering Department The
National Institute of Engineering Mysore-570
008 Mob 9342188467
Email gss_nie_at_yahoo.com
2
Learning out Come
  • Review of Lay out Drawing
  • Problems on Lay out drawing of column and footing
  • Problems on Lay out drawing of beams and slabs

3
Structural Lay-Out Drawing
  • Positioning and orientation of columns
  • Positioning of beams
  • Spanning of slabs
  • Layout of stairs
  • Selecting proper type of footing

4
Structural Lay-Out Drawing
  • Two axes marked one side with alphabets and the
    other with numbers.
  • Columns are marked at the intersection of grids
  • Beams are marked using two parallel lines
  • Slabs are indicated either as one way or two way

5
Structural Lay-Out Drawing Column Footing
A
B
C
D
1
2
3
4
6
Structural Lay-Out Drawing
A
B
C
D
1
2
3
4
7
Problem-1
Data For Column-Footing Lay out
  • A clear dimension of factory floor is 11.75 m x
    19.75 m
  • Spacing of columns 4m c/c
  • Size of columns 250 mm x 450 mm
  • Span of steel truss is 12.25 m c/c
  • At the ends to support the gable wall additional
    two RCC columns of size 250 mm x 450 mm are to be
    provided at 4m c/c measured from end columns
  • All the walls all-round are 250 mm thick
  • Height of columns 3m
  • Size of footing 1.4m x 1.8m
  • Thickness of footing 300 mm uniform
  • Depth of foundation 1.2m below ground level

8
Problem-1
Preliminary Calculations
  • External dimensions of the building
  • Along X-direction 11.75 2 x 0.25 12.25 m
  • Along Z-direction 19.75 2 x 0.25 20.25 m
  • Centre line dimensions of the building
  • Along X-direction 12.25 0.45 11.80 m
  • Along Z-direction 20.25 -0.25 20.00 m

9
Problem-1
Procedure
  • Draw the centerline of the building having
    11,800mm along X-direction and 20,000 mm along
    Z-directions
  • Mark these centre lines as grid lines A and D for
    lines parallel to Z-directions grid lines 1 and
    6 for lines parallel to X-axis
  • Measure 4000mm from grid lines A and D to get
    grid line B and C
  • Measure 4000mm c/c along Z-axis starting from
    grid line 1 to get grid lines 2, 3, 4 and 5
  • Draw rectangular filled box of size 250mm x 400mm
    at the intersection of gird lines along A and D
    to indicate the position of column along these
    grid lines as shown in Fig.

10
Problem-1
Procedure Contd.
  • Draw rectangular filled box of size 250mm x 400mm
    at the intersection of grid lines 1,6 with B and
    C respectively as shown in Fig.
  • Draw rectangles each of size 1400 mm x 1800mm
    symmetrically with respect to centre of column to
    indicate excavation marking for all columns. Here
    the shorter side of this rectangle box is
    parallel to the shorter side of column as shown
    in Fig. 1.8
  • Sectional elevation and plan of the footing of
    column is drawn just to the right of the key plan
    drawn as shown in Fig.

11
Problem-1
Drawing Key Plan
12
Problem-1
Drawing Footing Details
13
Problem-2
Data For Beam-Slab Lay out
  • Prepare a general layout showing the positions
    and sizes of Beams and Slabs to a suitable scale
    for a Community Hall
  • Clear dimension of hall is 12.05 m x 19.8 m
  • Three rows of columns are to be provided along
    the width with spacing of 6 m c/c
  • Six rows of columns are to be provided along the
    length with spacing of 4 m c/c
  • All the walls all-round are 200 mm thick
  • Size of columns 200 mm x 450 mm
  • Main beams are of size 200 mm x 600 mm
  • Secondary beams are of size 200 mm x 300 mm
  • Thickness of slab 150 mm

14
Problem-1
Preliminary Calculations
  • External dimensions of the building
  • Along X-direction 12.05 2 x 0.2 12.45 m
  • Along Z-direction 19.8 2 x 0.2 20.2 m
  • Centre line dimensions of the building
  • Along X-direction 12.45 - 0.45 12 m
  • Along Z-direction 20.2 -0.2 20.00 m

15
Problem-1
Procedure
  • Draw the centerline of the building having 12,000
    mm along X-direction and 20,000 mm along
    Z-directions
  • Mark these centre lines as grid lines A and C for
    lines parallel to Z-directions grid lines 1 and
    6 for lines parallel to X-axis
  • Measure 6000mm from grid lines A to get grid line
    B
  • Measure 4000mm c/c along Z-axis starting from
    grid line 1 to get grid lines 2, 3, 4 and 5
  • Draw rectangular filled box of size 200mm x 450mm
    at the intersection of gird lines along A and C
    to indicate the position of column along these
    grid lines as shown in Fig.

16
Problem-1
Procedure Contd.
  • Draw parallel lines spaced at 200mm symmetrically
    about the grid lines 1 to 6 to indicate main
    beams having effective span of 6m as shown in
    Fig. 1.9
  • Draw parallel lines spaced 200 mm abutting to end
    columns to indicate secondary beams as shown in
    Fig. 1.9. Also draw 200 mm wide secondary beam
    along grid line B as shown in Fig.1.9
  • Mark all the main beams as B1 and Secondary beams
    as B2
  • Indicate the slab as one way slab as shown in
    Fig. 1.9 and mark the slabs as S1.

17
Problem-1
Drawing Key Plan
18
Problem-1
Drawing CROSS-SECTION
19
Problem-1
Do it Yourself
  • 1. Prepare a general layout drawing including
    the details of columns and foundation for a
    shopping complex with four shops in the ground
    floor with the following details
  • Column size 230 x 450 mm
  • Spacing 3.5 m c/c
  • Span of the beam supported by columns 6m c/c
  • Depth of foundation 1.2 m below GL
  • Depth of Footing 450 mm

20
Problem-1
Do it Yourself
  • 2. Prepare a general lay out drawing for the
    ground floor of a community centre in a land
    measuring 35m x 50 m for the following
    particulars
  • Plinth area to be limited to 450 m2 (15m x 30m)
  • Height of each column 3.5m
  • Size of columns 300 mm x 450 mm
  • Effective span of each continuous beam 5m of
    size 300 mm x 500 mm
  • Secondary beams to be provided for a span of 4m
    and of size 300 mm x 400 mm
  • Plinth beam 300 mm x 400 mm all-round 0.6m above
    ground level
  • Footing of size 1.2 m x 2.8 m for each column
    has its uniform thickness 600mm

21
Problem-1
Do it Yourself
  • 3. Prepare a key plan at foundation level of a
    community hall building. Building has an
    auditorium of clear dimensions 12m x 19.7 m.
    Corridor of 4 m wide on either side (Parallel to
    longer side) of auditorium have to be provided.
    The roofing for auditorium is AC sheets supported
    on steel trusses. The end gable walls are
    supported on wall foundations. Roofing for
    corridor is RCC slab at 3m above floor level.
    Other details are
  • Clear span of roof truss 12m
  • Size of all RCC columns 300 mm x 600 mm
  • BBM columns of size 300 mm x 300 mm at 4 m c/c
    is to be provided in corridors to support slab
  • Assume suitable foundation for RCC columns and
    BBM columns

22
Summary
  • Introduction to structural Drawing
  • General Lay out Drawings
  • Procedure for drawing column and foundation
    Lay-Out Drawings
  • Procedure for drawing beam Lay-out Drawings
  • Case Study on Lay out drawings
  • Problems on Lay out of Column Footing
  • Problems on Lay out of Beams and Slabs

23
GOOD DAY
Dr. G.S.Suresh Civil Engineering Department The
National Institute of Engineering Mysore-570
008 Mob 9342188467
Email gss_nie_at_yahoo.com
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