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7/30/2019 Reinforcement Detailing-II
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CIVIL ENGINEERING DRAWING &GRAPHICS CH (1+2)
Lecture 12: Reinforcement detailing-II
Dr. Mohsin Siddique Asst. Prof.
Dept. of Civil EngineeringFAST-NU
07/11/2012
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Structure
• Structure is a system of connected parts used tosupport a load
• Classification of structures▫ Trusses▫
▫ Frames▫ Membrane
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RC Structures
• Concrete:▫ Weak in tension
▫ Strong in compression▫ Compression strength >> Tensile strength▫ Compressive strength ranges from 2000-5000psi. Normally its
taken as 3000psi after 28 days
• Steel:▫ Strong in tension and compression▫ Grade 40 Steel Characteristics:
▫ Yield Point 40,000 psi▫ Tensile Strength 55,000 psi
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RC Structures
C
• To overcome the weakness of concrete in tension, steel is providedinside the concrete.
• Hence, in RC structures, compressions is resisted by concrete whiletension is resisted by steel (often termed as reinforcement).
T
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RC Structures
• Beam
• Slab• Column• Footing
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• Typical reinforcement details are drawn in class
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Conversion Table
• FPS• Bar are represented as
• #1, #2, # 3 etc• # 1 mean a bar of 1/8inch diameter
• SI
• Bars are represented by diameter in mm• ø10 or 10ø
• Conversion Table
FPS
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Slab
• Slabs are structural members which are mainly used for coveringspaces in the form of roof or floor slabs
• These may be supported on walls only or on intermediate beams.• Slabs may be simply supported or fixed ends or continuous on more
than two side supports
• Slabs are of two types depending upon the placement of mainreinforcement▫ 1. one way slab
▫ 2. two way slab
▫ If longer span/smaller span >2 the slab is termed as one way slaband
▫ If longer span/smaller span >2 the slab is termed as two way slab
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• Typical reinforcement details are drawn in class
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Column reinforcement
• Common Shapes▫ Circular▫ Rectangular or square
▫ Main or verticalreinforcement
▫ Lateral ties or spiral
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Columns
Reinforcement
Typical Longitudinal
Section of Rectangularor Circular Column
Dowel barsTypical Concretecover~1 .5 inch
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Columns Reinforcement
Section 3-3
if column is Rectangular
Section 3-3
if column Circular
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Footing Reinforcement
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#3@9”c/c
Dowel bars
8 -# 8
#4@9”c/c
#4@9”c/c
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Footing
Cross sectionof column
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THANK YOU
• Questions….
• Feel free to contact: