Presentation on theme: "Design and drawing of RC Structures CV61"— Presentation transcript:
1 Design and drawing of RC Structures CV61 Dr. G.S.SureshCivil Engineering DepartmentThe National Institute of EngineeringMysoreMob:
2 Learning out Come Review of Lay out Drawing Problems on Lay out drawing of column and footingProblems on Lay out drawing of beams and slabs
3 Structural Lay-Out Drawing Positioning and orientation of columnsPositioning of beamsSpanning of slabsLayout of stairsSelecting proper type of footingDr.G.S.Suresh
4 Structural Lay-Out Drawing Two axes marked one side with alphabets and the other with numbers.Columns are marked at the intersection of gridsBeams are marked using two parallel linesSlabs are indicated either as one way or two wayDr.G.S.Suresh
7 Data For Column-Footing Lay out Problem-1Data For Column-Footing Lay outA clear dimension of factory floor is m x mSpacing of columns 4m c/cSize of columns 250 mm x 450 mmSpan of steel truss is m c/cAt 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 columnsAll the walls all-round are 250 mm thickHeight of columns = 3mSize of footing 1.4m x 1.8mThickness of footing 300 mm uniformDepth of foundation 1.2m below ground level
8 Preliminary Calculations Problem-1Preliminary CalculationsExternal dimensions of the building:Along X-direction = x 0.25 = mAlong Z-direction = x 0.25 = mCentre line dimensions of the building:Along X-direction = – 0.45 = mAlong Z-direction = = m
9 Problem-1ProcedureDraw the centerline of the building having 11,800mm along X-direction and 20,000 mm along Z-directionsMark 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-axisMeasure 4000mm from grid lines A and D to get grid line B and CMeasure 4000mm c/c along Z-axis starting from grid line 1 to get grid lines 2, 3, 4 and 5Draw 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. 1.8Sectional elevation and plan of the footing of column is drawn just to the right of the key plan drawn as shown in Fig.
13 Data For Beam-Slab Lay out Problem-2Data For Beam-Slab Lay outPrepare 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 m x 19.8 mThree rows of columns are to be provided along the width with spacing of 6 m c/cSix rows of columns are to be provided along the length with spacing of 4 m c/cAll the walls all-round are 200 mm thickSize of columns 200 mm x 450 mmMain beams are of size 200 mm x 600 mmSecondary beams are of size 200 mm x 300 mmThickness of slab = 150 mm
14 Preliminary Calculations Problem-1Preliminary CalculationsExternal dimensions of the building:Along X-direction = x 0.2 = mAlong Z-direction = x 0.2 = mCentre line dimensions of the building:Along X-direction = = 12 mAlong Z-direction = = m
15 Problem-1ProcedureDraw the centerline of the building having 12,000 mm along X-direction and 20,000 mm along Z-directionsMark 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-axisMeasure 6000mm from grid lines A to get grid line BMeasure 4000mm c/c along Z-axis starting from grid line 1 to get grid lines 2, 3, 4 and 5Draw 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. 1.9Draw parallel lines spaced 200 mm abutting to end columns to indicate secondary beams as shown in Fig Also draw 200 mm wide secondary beam along grid line B as shown in Fig.1.9Mark all the main beams as B1 and Secondary beams as B2Indicate the slab as one way slab as shown in Fig and mark the slabs as S1.
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 mmSpacing : 3.5 m c/cSpan of the beam supported by columns = 6m c/cDepth of foundation : 1.2 m below GLDepth 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 : 3.5mSize of columns : 300 mm x 450 mmEffective span of each continuous beam 5m of size 300 mm x 500 mmSecondary beams to be provided for a span of 4m and of size 300 mm x 400 mmPlinth beam 300 mm x 400 mm all-round 0.6m above ground levelFooting 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 = 12mSize of all RCC columns = 300 mm x 600 mmBBM columns of size 300 mm x 300 mm at 4 m c/c is to be provided in corridors to support slabAssume 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 DrawingsProcedure for drawing beam Lay-out DrawingsCase Study on Lay out drawingsProblems on Lay out of Column & FootingProblems on Lay out of Beams and SlabsDr.G.S.Suresh
23 GOOD DAY Dr. G.S.Suresh Civil Engineering Department The National Institute of EngineeringMysoreMob: