Lesson 2: Utilize Rebar Tools and Materials

Round Steel and Reinforcing Steel Bars (RSB)

• Round steel is a widely used reinforcing material for masonry and concrete construction.
• RSB is essential in resisting tension and compression in concrete.
• Steel is a strong alloy composed of iron, carbon, and other metals.

Alloy and Metal Characteristics

• Alloy: Combination of two or more metals.
• Fusion: Process of combining substances by melting.
• Iron (Fe): Ductile and malleable element.
• Carbon: Non-metallic element found in various forms such as diamond and graphite.
• Metal Characteristics: Opacity, ductility, conductivity, luster.

Galvanized Steel and Corrosion

• Galvanized Steel: Coated with zinc to prevent corrosion.
• Corrosion: Deterioration of steel due to oxidation, forming rust.

Types of Reinforcing Steel Bars (RSB)

• Plain RSB: Smooth surface, used for reinforcing slab on the ground.
• Deformed RSB: Contains lugs, ribs, or protrusions for increased bond with concrete.
• Size of RSB: Designated by number corresponding to nominal diameters.
• Sizes represented in metric or English systems, typically in eighths of an inch intervals.

Bar Chairs and Spacers

• Bar chairs and spacers are used to set and maintain the thickness of concrete of the RSB.
• Bar chairs: Maintain the horizontal concrete cover of the beam bottom RSB and footing RSB.
• Spacers: Maintain the vertical concrete cover of the RSB, footing, column, beam, etc.
• Types of Bar Chairs and Spacers: Mortar made, Plaster made, Steel made.

Learn about the importance of round steel (rebar) in masonry and concrete construction. Understand its role in resisting tension and compression in concrete structures. Explore the composition of steel as an alloy of iron, carbon, and other metals.