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When pouring a concrete stair, how can the riser face be repositioned if lateral deflections have taken place?
By adding some water to the concrete and continuing to pour at a slower rate.
By repositioning the ends of the riser stock to align with the bowed section.
By using an inverted stringer, wedging the riser stock slightly back beyond straightness and then continuing to pour.
By removing the concrete to allow the form to spring back into place, then replacing the concrete a little at a time.
The correct answer is: By using an inverted stringer, wedging the riser stock slightly back beyond straightness and then continuing to pour.
If lateral deflections have occurred during the pouring of a concrete stair, it is important to address the issue in order to ensure the structural integrity of the final product. Option A is incorrect as adding water to the concrete can weaken it and affect its strength. Option B is incorrect as simply repositioning the ends of the riser stock would not address the issue of lateral deflection. Option D is incorrect as removing and replacing small sections of concrete may result in uneven curing and affect the overall stability of the stair. Option C is the correct answer as using an inverted stringer and wedging the riser stock slightly back beyond straightness can help realign the riser face and address the issue of lateral deflection.