Red Seal Carpenter Practice Exam

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When pouring wing walls that will house a closed concrete stair, what procedure should be used so the inverted stringers can be easily attached?

Set ready rod ties in concrete in specified locations for attachment.
Set threaded inserts into concrete in specified locations for attachment.
Set taper ties into concrete in specified locations for attachment because they can be removed and filled with grout later.
Use explosive actuated tools to attach inverted stringers because there is less chance for error of attachment locations.

The correct answer is: Set threaded inserts into concrete in specified locations for attachment.

Threaded inserts are the best procedure to use when pouring wing walls that will house a closed concrete stair because they allow for easy attachment of the inverted stringers. Ready rod ties (A), although common, are more difficult to adjust and do not provide a secure connection. Taper ties (C) should not be used because they are not meant for attachment purposes and can negatively impact the stability of the structure. Explosive actuated tools (D) are not necessary and can be dangerous to use in this situation.