Dr S.Sreenath PhD, MSc Engg, MSc (ICM), MBA Rebar Dr S.Sreenath PhD, MSc Engg, MSc (ICM), MBA
Reinforced Concrete Reinforced concrete is a combination of both steel and concrete using the best properties of each. Compressive strength of concrete. Tension strength of steel. Title of presentation
Types of Rebar Mild steel High yield deformed steel Title of presentation
Mild steel Grade 250 reinforcement complying to BS4449. Title of presentation
Mild Steel Title of presentation
Mild Steel Title of presentation
Stress - Strain Graph Title of presentation
Stress – Strain Curve of Mild Steel Title of presentation
High yield deformed steel Increase in yield strength meant that the assured load bearing capacity enables a more efficient and simplified reinforcement detailing, translating to material cost savings. A high level of ductility ensures that high strength steel can better withstand bending tests with no visible fractures or cracks. Grade 460 reinforcement complying with BS 4482. Title of presentation
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Stress – Strain Curve of High Strength Steel Title of presentation
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May 2009 Title of presentation
Rebar Markings 4 T 25 01 – 125 4 – Number of bars T – Type of steel 25 – Diameter of bars 01 – Bar mark of bar 125 – Spacing of bars Title of presentation
Fabric Reinforcement Title of presentation
Advantages of Welded Mesh Flexibility and controlled manufacturing to suit any structural requirement either in flat sheet or shaped form. High and consistent quality welded mesh delivered just-in-time to site. Improved site productivity with reduced reliance on manpower on-site. Material wastage is controlled and reduced. Reduced cost due to enhanced speed of construction. Better utilisation of on-site space and logistics. Welded mesh conforms to SS 18:1999, SS 32:1999, BS 4482:1985, BS4483:1998 or AS/NZS 4671:2001. Title of presentation
Wall and Slab Mesh Title of presentation
Drain Mesh Title of presentation
Pilecap Mesh Title of presentation
Precage column Title of presentation
Lift Lobby and Staircase Mesh Title of presentation
May 2009 Title of presentation
Ordering of Material Standard straight bars. Cut – to- length and Cut-bent steel bars. Title of presentation
Transport of Steel Reinforcement Risk due to transport. Risk due to lifting. Risk due to storage. Title of presentation
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May 2009 Title of presentation
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Limit State Design Factor of Safety. Permissible stress – Ultimate strength / FS Load Factor Method – Working load X FS Limit State Method – Working load X Partial Factor of safety and also Ultimate strengths are divided by further partial factors of safety. Title of presentation
Limit State A condition at which a structure becomes unfit for its intended use. Ultimate Limit State – This requires that structure must be able to withstand the designed loads with an adequate factor of safety against collapse. Serviceability Limit State – Deflection, Cracking and Durability. Title of presentation