How is the hand of a door determined?

The hand of a door, meaning whether it is a left-hand or right-hand door, is determined by the location of the hinges when the door is viewed from the inside. This perspective is essential because it establishes how the door swings open. For instance, if the hinges are on the left side of the door frame when you are standing inside the room and looking at the door, it is classified as a left-hand door. Conversely, if the hinges are on the right, it is a right-hand door. This classification is important for installation, ensuring that the door opens in the intended direction for optimum functionality and accessibility.

The incorrect options do not accurately define how door hand is determined. The location of the doorknob may influence the usability of the door but is not a factor in its classification as left or right-hand. Door thickness does not relate to hand determination and does not influence how the door functions in terms of swing direction. The material of the door also has no bearing on its hand classification; it is strictly based on the hinge positioning in relation to the observer's perspective.