California B2 Residential Remodeling – Building Planning Free Exam

Where an addition is made to an existing dwelling, or a fuel-burning heater, appliance, or fireplace is added to an existing dwelling, not previously required to be provided with carbon monoxide alarms, new carbon monoxide alarms shall be installed in accordance with Section R315.

Exceptions:
1. Work involving the exterior surfaces of dwellings,
such as the replacement of roofing or siding,
or the addition or replacement of windows or
doors, or the addition of a porch or deck.
2. Installation, alteration or repairs of
plumbing or mechanical systems.

2019 California Residential Code. Chapter 3, Building Planning. Section R315, Carbon monoxide alarms. R315.2 Where Required. R315.2.2 Alterations, repairs and additions.

The clear height above and below mezzanine floor construction shall be not less than 7 feet (2134 mm).

2019 California Residential Code. Chapter 3, Building Planning. Section R325, Mezzanines. R325.2 Mezzanines.

The clear width at and below the handrails at spiral stairways shall be not less than 26 inches (660 mm) and the walkline radius shall be not greater than 24-1/2 inches (622 mm). Each tread shall have a depth of not less than 6-3/4 inches (171 mm) at the walkline. Treads shall be identical, and the rise shall be not more than 9-1/2 inches (241 mm). Headroom shall be not less than 6 feet 6 inches (1982 mm).

2019 California Residential Code. Chapter 3, Building Planning. Section R311, Means of egress. R311.7 Stairways. R311.7.10 Special Stairways. R311.7.10.1 Spiral stairways.

Unless otherwise allowed in Section R316.5, foam plastic shall be separated from the interior of a building by an approved thermal barrier of not less than 1/2-inch (12.7 mm) gypsum wallboard, 23/32-inch (18.2 mm) wood structural panel or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275.2019 California Residential Code.

Chapter 3, Building Planning
Section R316, Foam Plastic.
R316.4 Thermal barrier.

Handrails shall be provided on not less than one side of ramps exceeding a slope of one unit vertical in 12 units horizontal (8.33-percent slope).

2019 California Residential Code. Chapter 3, Building Planning. Section R311, Means of egress. R311.8 Ramps. R311.8.3 Handrails required.

A habitable attic shall not be considered a story where complying with all of the following requirements:

1. The occupiable floor area is not less than 70 square
feet (17 m2), in accordance with Section R304.
2. The occupiable floor area has a ceiling height
in accordance with Section R305.
3. The occupiable space is enclosed by the roof
assembly above, knee walls (if applicable) on the
sides and the floor-ceiling assembly below.
4. The floor of the occupiable space shall not extend
beyond the exterior walls of the floor below.

2019 California Residential Code. Chapter 3, Building Planning. Section R325, Mezzanines. R325.6 Habitable attic

The clear width at and below the handrails at spiral stairways shall be not less than 26 inches (660 mm) and the walkline radius shall be not greater than 24-1/2 inches (622 mm). Each tread shall have a depth of not less than 6-3/4 inches (171 mm) at the walkline. Treads shall be identical, and the rise shall be not more than 9-1/2 inches (241 mm). Headroom shall be not less than 6 feet 6 inches (1982 mm).

2019 California Residential Code. Chapters, Building Planning. Section R311, Means of egress. R311.7 Stairways. R311.7.10 Special Stairways. R311.7.10.1 Spiral stairways.

This section applies to storm shelters where constructed as separate detached buildings or where constructed  as safe rooms within buildings for the purpose of providing refuge from storms that produce high winds, such as tornados and hurricanes. In addition to other applicable requirements in this code, storm shelters shall be constructed in accordance with ICC/NSSA-500.

2019 California Residential Code. Chapters, Building Planning. Section R323 Storm shelters. R323.1, General.

The aggregate area of a mezzanine or mezzanines shall be not greater titan one-third of the floor area of the room or space in which they are located. The enclosed portion of a room shall not be included in a determination of the floor area of the room in which the mezzanine is located.

2019 California Residential Code. Chapter 3, Building Planning. Section R325, Mezzanines. R325.3 Area limitation.

Unless otherwise allowed in Section R316.5, foam plastic, or foam plastic cores used as a component in manufactured assemblies, used in building construction shall have a flame spread index of not more than 75 and shall have a smoke-developed index of not more than 450 when tested in the maximum thickness and density intended for use in accordance with ASTM E84 or UL723. Loose-fill-type foam plastic insulation shall be tested as board stock for the flame spread index and smoke-developed index.

2019 California Residential Code. Chapters. Building Planning. Section R316, Foam Plastic. R316.3 Surface burning characteristics.

Unless otherwise allowed in Section R316.5, foam plastic, or foam plastic cores used as a component in manufactured assemblies, used in building construction shall have a flame spread index of not more than 75 and shall have a smoke-developed index of not more than 450 when tested in the maximum thickness and density intended for use in accordance with ASTM E84 or UL 723. Loose-fill-type foam plastic insulation shall be tested as board stock for the flame spread index and smoke-developed index.

2019 California Residential Code. Chapters, Building Planning. R316.3 Surface burning characteristics.

Required guards shall not have openings from the walking surface to the required guard height that allow passage of a sphere 4 inches (102 mm) in diameter.

Exceptions:
1. The triangular openings at the open side of
stair, formed by the riser, tread and bottom
rail of a guard, shall not allow passage of a
sphere 6 inches (153 mm) in diameter.
2. Guards on the open side of stairs shall not
have openings that allow passage of a sphere
43/8 inches (111 mm) in diameter

2019 California Residential Code. Chapters, Building Planning. Section R312, Guards and window fall protection. R312.1 Guards. R312.1.3 Opening limitations.

For existing buildings and new construction, carbon monoxide alarms shall be provided in dwelling units where either or both of the following conditions exist.

1. The dwelling unit contains a fuel-fired appliance.
2. The dwelling unit has an attached garage with an
opening that communicates with the dwelling unit.

2019 California Residential Code. Chapter 3, Building Planning. Section R315, Carbon monoxide alarms. R315.2 Where Required. R315.2.1 Existing Buildings and New construction.

Handrails shall be continuous for the full length of the flight, from a point directly above the top riser of the flight to a point directly above the lowest riser of the flight. Handrail ends shall be returned or shall terminate in newel posts or safety terminals.

2019 California Residential Code. Chapters, Building Planning. Section R311, Means of egress. R311 7 Stairways. R311.7.8 Handrails. R311.7.8.4 Continuity.

Ramps serving the egress door required by Section R311.2 shall have a slope of not more than 1 unit vertical in 12 units horizontal (8.3-percent slope). Other ramps shall have a maximum slope of 1 unit vertical in 8 units horizontal (12.5 percent).

2019 California Residential Code. Chapters, Building Planning. Section R311, Means of egress. R311.8 Ramps. R311.8.1 Maximum slope.