Building codes are established to protect public health, safety, and general welfare as they relate to construction and occupancy of buildings and structures. Aesthetics and construction costs are not the primary focus of building codes.
The IBC requires a minimum fire-resistance rating of 1 hour for barriers around stairway enclosures in most buildings. This rating helps prevent the spread of fire, allowing occupants enough time to evacuate safely.
This requirement is set by the IRC and IBC to ensure that stairs are both safe and comfortable to use, with a balance between tread depth and riser height that minimizes tripping hazards.
According to the IBC, habitable spaces such as bedrooms, living rooms, and kitchens should have a minimum ceiling height of 7 feet. This is to ensure adequate space for occupant comfort and safety.
Building codes restrict the percentage of openings on exterior walls near property lines to reduce the spread of fire between buildings. This rule is especially critical in urban areas where buildings are close together.
