AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

How should reinforcing bars be supported to provide the specified concrete cover in an invert or wall?

On chairs, bolsters, or dobies that maintain the specified cover; do not use brick or wood that will rot On scrap lumber that will be left in the pour On loose brick stacked to any convenient height By walking the bars down into fresh concrete after the pour starts

Correct Answer:

On chairs, bolsters, or dobies that maintain the specified cover; do not use brick or wood that will rot

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