The level tool used in carpentry is typically made of wood, aluminum, or magnesium, and is rectangular in shape, from 9 to 24 inches long. It may typically have one or more true surfaces having a glass vial in the center of each surface. The glass vial right in the center of a horizontal surface and parallel with it is used in leveling; a glass vial in the end of a level, perpendicular to the true surface, is used to check the plumb or vertical trueness.
To check whether a surface is level or plumb, put the level tool on the surface to be leveled or plumbed, while holding the level with the hand. When the position of the bubble isn’t in the center of the vial, the surface is not level or plumb. The bubble always moves toward the higher side...READ MORE>>>