What does LHS stand for?

Left Hand Side

In construction, Left Hand Side (LHS) typically refers to the orientation of a structure, component, or installation relative to a fixed reference point. It is commonly used in architectural plans, engineering drawings, and site layouts to indicate positioning. LHS is particularly important in door handing, where it determines the direction in which a door swings open. A left-hand (LH) door has hinges on the left side and swings inward to the left, while a left-hand reverse (LHR) door swings outward to the left.

LHS is also relevant in building design, where left-side orientation affects accessibility, traffic flow, and structural alignment. Contractors and facility managers use precise handing terminology to ensure compliance with safety regulations, such as fire-rated doors and ADA accessibility standards. Misidentifying LHS in construction can lead to costly errors, delays, and compliance failures.