Rebar Detailer

10+ Rebar Detailer Interview Questions and Answers

Updated 18 May 2024
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Q1. Which type of structure you can detail, which element you can detail.

Ans.

I can detail various types of structures including buildings, bridges, and tunnels. I can detail elements such as beams, columns, and foundations.

  • I can detail buildings, bridges, tunnels, and other structures

  • I can detail elements such as beams, columns, foundations, and more

  • I have experience with various materials including steel, concrete, and wood

Q2. 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.

Rebar Detailer Interview Questions and Answers for Freshers

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Q3. 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 development length is specified in terms of the bar diameter...read more

Q4. 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 garages, and water tanks.

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Q5. Beam top & bottom condition Slab T&B condition How to calculate manual BBS for column Difference between Lap & Anchor Structureal Level difference how to handle bar shape 150mm difference example one side 450mm...

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Ans.

The question is about beam and slab conditions, manual BBS calculation for columns, difference between lap and anchor, and handling bar shape differences.

  • Beam top and bottom condition refers to the condition of the top and bottom surfaces of a beam.

  • Slab T&B condition refers to the condition of the top and bottom surfaces of a slab.

  • Manual BBS calculation for columns involves calculating the bar bending schedule manually, which includes determining the number, length, and shape...read more

Q6. What use for bar code for chair bar

Ans.

Bar codes are used for tracking and identifying chair bars in construction projects.

  • Bar codes help in identifying the correct chair bar for a specific location in the project.

  • They also aid in tracking the progress of the project and ensuring that all necessary bars are in place.

  • Bar codes can be scanned using mobile devices, making it easier to manage and update the project information.

  • They can also help in reducing errors and improving the overall efficiency of the constructi...read more

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Q7. 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.

Q8. 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 uniform in quality due to controlled casting conditions.

  • Example...read more

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Q9. 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, the effective cover would be 20mm.

Q10. 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.

Q11. Draw the Shear force diagram and bending moment diagram

Ans.

Shear force and bending moment diagrams are graphical representations of the internal forces in a structural element.

  • Shear force diagram shows the variation of shear force along the length of the beam.

  • Bending moment diagram shows the variation of bending moment along the length of the beam.

  • Both diagrams are essential for analyzing the structural behavior of a beam under different loading conditions.

Q12. 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.

Q13. 3 bar codes as per British code

Ans.

The 3 bar codes as per British code are BS 4449, BS 4482, and BS 8666.

  • BS 4449 is for steel bars for the reinforcement of concrete

  • BS 4482 is for steel wire for the reinforcement of concrete

  • BS 8666 is for scheduling, dimensioning, bending and cutting of steel reinforcement for concrete

Q14. Draw isometric view from orthographic drawings

Ans.

Drawing isometric views from orthographic drawings requires understanding of spatial relationships and perspective.

  • Identify the front, top, and side views in the orthographic drawings

  • Use isometric grid paper to accurately draw the isometric view

  • Ensure all lines are parallel and at correct angles

  • Add dimensions and annotations to clarify the drawing

Q15. Explain elements characteristics

Ans.

Elements characteristics refer to the unique properties and attributes of different elements.

  • Elements characteristics include atomic number, atomic mass, electron configuration, and chemical properties.

  • For example, the element hydrogen has an atomic number of 1, atomic mass of 1.008, electron configuration of 1s1, and is a colorless, odorless gas.

  • Elements can be classified into different groups based on their characteristics, such as alkali metals, transition metals, halogens...read more

Q16. cover used in building

Ans.

A cover used in building is typically a protective layer or structure that shields the building from external elements.

  • Covers can include roofing materials such as shingles, tiles, or metal sheets.

  • Exterior covers like siding or cladding can also be used for protection and aesthetics.

  • Interior covers like drywall or ceiling tiles can provide insulation and finish to the building.

  • Covers can also refer to temporary structures like scaffolding used during construction.

  • Examples: Ro...read more

Q17. Rebar designer in computer

Ans.

Rebar designers use computer software to create detailed drawings of reinforcement bars for construction projects.

  • Rebar designers use specialized software like AutoCAD or Revit to create detailed drawings of reinforcement bars

  • They input project specifications and design requirements into the software to generate accurate drawings

  • Rebar designers work closely with engineers and construction teams to ensure the reinforcement bars meet structural requirements

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