3113 Relocatable Buildings — 2025 California Building Code

The provisions of this section shall apply to relocatable buildings. Relocatable buildings manufactured after the effective date of this code shall comply with the applicable provisions of this code. [DSA-SS and DSA-SS/CC] as enforced by the enforcement agency.

Exception: This section shall not apply to manufactured housing used as dwellings.

[HCD] The provisions of Section 3113 are not applicable to commercial modulars, manufactured homes, mobilehomes, multi-unit manu- factured housing and special purpose commercial modulars as defined in Health and Safety Code Sections 18001.8, 18007, 18008, 18008.7 and 18012.5, respectively. These structures are subject to installation/reinstallation requirements specified in the Mobilehome

31-12 2025 CALIFORNIA BUILDING CODE

SPECIAL CONSTRUCTION

Parks Act (Health and Safety Code Section 18200 et seq.) and the California Code of Regulations, Title 25, Division 1, Chapter 2. Manufac- tured homes must meet unit identification (data plate) and certification label requirements as specified in the Code of Federal Regulations, Title 24, Subtitle B, Chapter XX, Part 3280 and Health and Safety Code Section 18032. Commercial modulars and special purpose commercial modulars must meet identification requirements in the California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 2.

3113.1.1 Compliance. A newly constructed relocatable building shall comply with the requirements of this code for new construction. [DSA-SS and DSA-SS/CC] as enforced by the enforcement agency. An existing relocatable building that is undergoing alteration, addition, change of occupancy or relocation shall comply with Chapter 14 of the California Existing Building Code .

Exception: [DSA-SS and DSA-SS/CC] An existing relocatable public school building that is undergoing alteration, addition or change of occupancy shall comply with Chapter 3 of the California Existing Building Code.

Supplemental information specific to a relocatable building shall be submitted to the authority having jurisdiction. It shall, as a minimum, include the following in addition to the information required by Section 105:

Exception: [DSA-SS and DSA-SS/CC] Supplemental information specific to a relocatable building shall be submitted to the enforce- ment agency. It shall, as a minimum, include the following in addition to the information required by Section 1603A:

1. Manufacturer’s name and address.

2. Date of manufacture.

3. Serial number of module.

4. Manufacturer’s design drawings.

5. Type of construction in accordance with Section 602.

6. Design loads including: roof live load, roof snow load, floor live load, wind load and seismic site class, use group and design category.

7. Additional building planning and structural design data.

8. Site-built structure or appurtenance attached to the relocatable building.

Each relocatable module shall have a data plate that is permanently attached on or adjacent to the electrical panel, and shall include the following information:

1. Occupancy group.

2. Manufacturer’s name and address.

3. Date of manufacture.

4. Serial number of module.

5. Design roof live load, design floor live load, snow load, wind and seismic design.

6. Approved quality assurance agency or approved inspection agency.

7. Codes and standards of construction.

8. Envelope thermal resistance values.

9. Electrical service size.

10. Fuel-burning equipment and size.

11. Special limitations if any.

Exception: [DSA-SS and DSA-SS/CC] Each relocatable module shall have two metal identification labels permanently attached to the structure as enforced by the enforcement agency.

The building official is authorized to accept reports of inspections conducted by approved inspection agencies during off-site construction of the relocatable building, and to satisfy the applicable requirements of Sections 110.3 through 110.3.12.1.

Exception: [DSA-SS and DSA-SS/CC] Each relocatable module shall be inspected during construction and installation at the project site by project inspectors acceptable to the enforcement agency in accordance with Part 1, California Administrative Code, Title 24, CCR.