From
a manufacturer web site:
"Factory-built housing should not be confused with manufactured housing or mobile homes. While both products represent a type of a dwelling manufactured in a factory, each utilizes an entirely different set of construction codes and standards. The construction of dwellings using FBH laws and regulations utilizes the California Building Code, while manufactured housing is constructed using federal standards. Factory-built housing products may include single or multi-family dwellings, hotels, motels or dormitory construction.
California law defines FBH as follows: âFactory-built housing means a residential building, dwelling unit, or an individual dwelling room or combination of rooms thereof, or building component, assembly, or system manufactured in such a manner that all concealed parts or processes of manufacture cannot be inspected before installation at the building site without disassembly, damage, or destruction of the part, including units designed for use as part of an institution for resident or patient care, that is either wholly manufactured or is in substantial part manufactured at an offsite location to be wholly or partially assembled onsite in accordance with building standards published in the California Building Standards Code and other regulations adopted by the commission pursuant to Section 19990. Factory-built housing does not include a mobile home, as defined in Section 18008,a recreational vehicle, as defined in Section 18010.5, or a commercial modular, as defined in Section 18012.5.â
Simply put, FBH units are dwellings manufactured off-site, in sections or components which are assembled at the installation site to form a part of, or a complete dwelling. An FBH component may consist of a wall, floor or roof panel utilizing rigid foam insulation enclosed by interior and exterior
sheathing materials; or may also be a conventionally framed closed-system 6 wall or roof panel containing the plumbing, electrical, etc. systems inside the panel.
An FBH dwelling unit may be 2 or more âmodulesâ assembled on site and attached to a foundation.
FBH products do not include âopen-framedâ prefabricated construction since open-framed type construction allows inspection at the building site without disassembly.