Pinnacle Infotech Rebar Detailer Interview Questions, Process, and Tips

Q1. What is RCC? Where it is used?
Ans. 
RCC stands for Reinforced Cement Concrete. It is a composite material made of concrete and steel reinforcement bars.
• RCC is commonly used in construction for buildings, bridges, dams, and other structures.

• It provides strength and durability to the structure by combining the compressive strength of concrete with the tensile strength of steel reinforcement.

• Examples of RCC structures include high-rise buildings, parking ga
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Q2. Difference between CIP & Precast?
Ans. 
CIP (Cast-In-Place) involves pouring concrete on site, while Precast involves casting concrete elements off site and transporting them to the construction site.
• CIP involves pouring concrete on site and allowing it to cure in place.

• Precast involves casting concrete elements in a controlled environment off site.

• CIP allows for more flexibility in design changes during construction.

• Precast elements are typically more unifo...read more
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Q3. Is tilt-up wall panel CIP or Precast?
Ans. 
Tilt-up wall panels are typically precast.
• Tilt-up wall panels are usually precast concrete panels that are cast on site and then lifted into place.

• CIP (Cast-in-Place) wall panels are poured and cured on site without being lifted into place.

• Precast panels are manufactured off-site in a controlled environment and then transported to the construction site for installation.
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Q4. Define point of contraflexure.
Ans. 
Point of contraflexure is the location in a beam where the bending moment changes sign.
• Point of contraflexure is where the bending moment is zero.

• It is the point where the beam changes from sagging to hogging or vice versa.

• It is typically located at a support or a point of concentrated load.

• Example: In a simply supported beam with a uniformly distributed load, the point of contraflexure is at the center.
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Q5. Nominal cover vs Effective cover.
Ans. 
Nominal cover is the specified distance between the outer surface of the concrete and the reinforcement, while effective cover is the actual distance after accounting for deviations.
• Nominal cover is the distance specified in design drawings or codes.

• Effective cover takes into account factors like tolerances, deviations, and surface irregularities.

• For example, if nominal cover is 25mm and there is a deviation of 5mm, th
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Q6. Class 1 vs Class 2 lap.
Ans. 
Class 1 lap is when one bar is lapped over another and Class 2 lap is when both bars are lapped over each other.
• Class 1 lap involves lapping one bar over another.

• Class 2 lap involves lapping both bars over each other.

• Class 1 lap is commonly used for smaller diameter bars.

• Class 2 lap is commonly used for larger diameter bars.
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Q7. Difference between Lap & Development length?
Ans. 
Lap length is the length of overlap between two reinforcing bars, while development length is the length required to transfer the stress from the bar into the concrete.
• Lap length is used to ensure continuity of reinforcement along the length of the bar.

• Development length is used to ensure proper bond between the reinforcing bar and the concrete.

• Lap length is typically specified in terms of diameter of the bar, while de...read more
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Q8. What is Anchorage Length?
Ans. 
Anchorage length is the length of the embedded portion of a reinforcing bar required to transfer the load from the bar to the surrounding concrete.
• Anchorage length is determined by the type of bar, concrete strength, and design loads.

• It is important for ensuring the stability and strength of a structure.

• Examples of anchorage length include development length for beams and lap splice length for columns.
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