Final answer:
To make sure a wall is perpendicular to the subfloor means that the wall forms a right angle (90 degrees) with the subfloor. This is important for structural stability and accuracy in construction projects. Choosing a positive direction towards the wall helps maintain consistency in measurements.
Step-by-step explanation:
To make sure a wall is perpendicular to the subfloor means that the wall forms a right angle (90 degrees) with the subfloor.
In other words, when the subfloor is level, the wall stands upright and straight up from the subfloor.
This is an important aspect of construction to ensure structural stability and accuracy in building projects.
For example, if you are building a room and need to install a wall, you would use a level to ensure the wall is perfectly perpendicular to the subfloor.
If the wall is not perpendicular, it may lean or cause other issues in the construction process.