Ceiling joists are sometimes brought into alignment with the installation of a ____ across the tops of the joists near the center of the span.

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A strongback is a horizontal piece of lumber that is secured perpendicular to and in between two or more ceiling joists to help distribute the load and bring them into alignment. A ridge board is used to support the upper ends of rafters in a sloped roof, a rafter is a sloping beam that supports a pitched roof, and a collar tie is a horizontal member that connects two opposite rafters at the same level of a roof.

Ceiling Joists Are Sometimes Brought into Alignment with the Installation