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Rebar Cage Handling Process Quiz

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Questions and Answers

What is the primary purpose of the bracing used during the erection of a rebar cage?

To hold the cage plumb during the placing of formwork and concrete casting (correct)
To prevent the rebar cage from buckling and collapsing
To provide additional structural support to the rebar cage
To facilitate the lifting of the rebar cage into place

Why is the erection and bracing of column rebar cages often left to the means and methods of the contractor?

It is a cost-saving measure for the project
It is rarely under the guidance of a professional engineer (correct)
It is a standard industry practice that requires no oversight
It is a simple process that does not require specialized expertise

What are the potential consequences of the lack of guidance from a professional engineer during the erection of rebar cages?

No significant consequences, as the contractors are experienced in this process
Improved safety for the workers handling the rebar cages
Buckling and collapse of the rebar cage, leading to significant delays (correct)
Increased efficiency and cost savings for the project

What are the main hazards associated with the handling of rebar cages onsite?

Roll and crush hazards, as well as injury to workers (B) Signup and view all the answers

What safety measures are recommended to mitigate the risks associated with rebar cage handling?

Maintaining a safe distance from the cage and using appropriate lifting equipment (B) Signup and view all the answers

What is the primary method used to construct rebar cages on construction sites?

Connecting the longitudinal and transverse reinforcing bars using thin, cold-drawn tie wire (A) Signup and view all the answers

What is the purpose of a jack frame in construction?

To secure anchor bolts or stub angles in place (A) Signup and view all the answers

What is the main function of a rebar cage in construction?

To reinforce concrete structures (B) Signup and view all the answers

What is a key reason for pre-installed spacers on a rebar cage?

To center the cage in the shaft (A) Signup and view all the answers

Why are misplaced or misaligned anchor bolts considered a common problem in construction?

As a result of not securely positioning them (C) Signup and view all the answers

What is a critical step before releasing a rebar cage from the crane rigging?

Securing the cage to the top of the drilled shaft (D) Signup and view all the answers

In what part of a drilled shaft are longitudinal bars most required?

In the upper section near ground level (C) Signup and view all the answers

What does the rigging process involve when placing anchor bolts or stub angles?

Lifting and aligning with precision (B) Signup and view all the answers

Why are strict safety protocols necessary during handling and installation of rebar cages?

To prevent accidents and ensure project success (B) Signup and view all the answers

What is one of the main functions of anchor bolts or stub angles in construction?

To secure structures to concrete foundations (D) Signup and view all the answers

Why is it important for reinforcement within drilled shafts to be strongest at the top diameters?

To provide stability and strength near ground level (C) Signup and view all the answers

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