National Occupational Competency Testing Institute (NOCTI) Carpentry Practice Exam

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Which component is directly used to connect horizontal structures like walls to ceilings?

Double plates
Rim board
Stringer
Joist

The correct answer is: Double plates

The component that is directly used to connect horizontal structures like walls to ceilings is the double plate. The double plate comprises two horizontal member layers that are placed on top of wall studs. This creates a solid and level surface that provides structural support for ceiling joists. By distributing the weight of the ceiling and helping to transfer loads from the roof down through the walls, the double plate plays a critical role in ensuring the integrity of the structure. The other components mentioned serve different purposes in carpentry. The rim board is typically used at the edge of floor joists, helping to stiffen the floor and provide a surface to attach exterior walls. Stringers are structural components usually associated with staircases, supporting treads and risers. Joists are horizontal members that support floors and ceilings but do not serve the specific function of connecting walls to ceilings directly in the manner that double plates do.