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(a) Definitions. Asused in this section:
(1) "Fire separation" means the distance, in feet, measured from the building face to the closest interior lot line, to the centerline of a street or public space or to an imagi nary line halfway between two buildings on the same property.
(2) "Unprotected wood frame construction" means construction in which some portion of the building or other structure has a fire resistance rated protection of less than one hour.
For the purpose of this section, structures of pressure treated fire-retardant lumber are not unprotected wood f rame construction.
(b) Unprotected Wood Frame Construction. Unprotected wood frame buildings and/or structures are not permitted, except for the temporary use of builders during construction and for reviewing stands, platforms and booths of a temporary nature. All such structures must be approved by the Director of Code Administration. Structures for the use of builders in connection with the erection of a new building or with the repair or remodeling of an old building shall be removed as soon as they have ceased to serve the original purpose for which they were permitted.
(c) Wood Veneers. Wood veneers of a one-inch nominal thickness or exterior grade plywood not less than three-eighths of an inch thick may be used on exterior walls when facing a fire separation of a minimum of thirty feet, provided that the veneer does not exceed one story in height and provided, further, that the veneer is applied to noncombustible backing or is furred, not to exceed one and five-eighths of an inch.
All concealed spaces shall be firestopped at intervals not to exceed twenty feet.
All furring and fire-stopping material shall be noncombustible and/or wood which has been pressure treated with fire-retardant chemicals.
Wood veneers meeting the requirements set forth in this subsection may be extended to two stories in height when all materials used are noncombustible and/or wood which has been pressure treated with fire-retardant chemicals.
When fire-retardant treated wood is exposed to the weather, evidence, i. e. , testing laboratory reports, shall be provided to show that there is not a decrease in its fire retardancy.
(d) Billboards. Billboards constructed of galvanized sheet steel on wooden posts and wood frame construction are permitted, provided that no such billboard may be erected without the prior approval of the Code Administrator.
(Ord. 82-16. Passed 2-1-82.)