National Occupational Competency Testing Institute (NOCTI) Carpentry Practice Exam

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Prepare for the NOCTI Carpentry Exam. Study using flashcards and multiple-choice questions, each with detailed explanations and tips. Get ready for your exam with confidence!

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Practice this question and more.

What is the tread in relation to a staircase?

The vertical board at the back of the step
The horizontal surface that is stepped on
The diagonal support for the stairs
The measurement of the stair's rise

The correct answer is: The horizontal surface that is stepped on

The tread refers specifically to the horizontal surface of a stair step that is stepped on when ascending or descending the staircase. It is an integral part of stair design, providing both functionality and safety. The tread's width and depth are critical factors in ensuring comfortable and secure footing for users. A well-designed tread allows for stability and balance, reducing the risk of slipping or falling. Understanding the role of the tread is essential for carpenters when constructing or renovating stairs, as proper tread dimensions contribute to meeting building codes and providing a safe walking surface.