Architecture
Core building dimensions: doors, stairs, corridors, ceilings, and structural clearances.
Interior Door Clear Width
Minimum clear opening width for a standard interior passage door.
Entry / Exterior Door Width
Typical leaf widths for single and double front entry doors.
Minimum Habitable Ceiling Height
Minimum and typical finished ceiling heights for habitable rooms.
Stair Riser & Tread Dimensions
Standard riser height and tread depth for comfortable, code-compliant stairs.
Stair Width (Clear)
Minimum clear width of a stairway, measured between finished wall surfaces.
Handrail Height
Height of stair and ramp handrails, measured vertically above the tread nosing or ramp surface.
Guardrail / Balcony Railing Height
Minimum height of guards protecting open-sided elevated walking surfaces.
Hallway / Corridor Width
Clear width of interior corridors for residential and commercial circulation.
Egress Window Sill Height
Maximum sill height above the finished floor for a bedroom egress window.
Garage Door Width
Standard clear widths for single and double vehicle garage doors.
Floor-to-Floor Height
Typical vertical distance between finished floor levels in multi-story buildings.