Door Hinge Installation Diagram - Standard 4-Hinge Setup for Interior Doors #3627174 (License: Personal Use)

This black-and-white line drawing illustrates a standard interior door with four rectangular panels and a round doorknob, mounted on a frame using four evenly spaced hinges along the hinge-side edge. The hinges are depicted in open position, indicating how the door pivots. The diagram is commonly used in construction manuals, hardware guides, and architectural schematics to convey correct hinge spacing and alignment for stability and smooth operation.

Used in home improvement tutorials, carpentry documentation, door hardware product pages, and building code references; serves users looking to install or replace doors correctly, especially those verifying hinge count and placement for load-bearing doors.