Section 105.2(a)(i) of the Building Code and Section R105.2(a)(i)
of the Residential Code are hereby amended to define requirements
to prevent nuisance animal and pest infestation in accessory buildings,
as provided in the State Construction Code Act, No. 230 of the Public
Acts of Michigan 1972 [MCLA 125.1508a(10)]. Nuisance animal and pest
prevention must be provided to prevent the infestation and harborage
of insects and rats or other burrowing den-building animals. All detached
accessory buildings shall be constructed in accordance with the provisions
of this chapter.
A.
For
buildings requiring continuous foundations, the minimum footing depth
shall be 24 inches.
B.
For
buildings not requiring a continuous foundation, the following requirements
shall apply:
(1)
Aprons. Where an apron is provided, the apron shall not be less than
eight inches (203 mm) above nor less than 24 inches (610 mm) below
grade. In all cases the apron shall not terminate below the lower
edge of the siding material. The apron shall be constructed of an
approved nondecayable, water-resistant, ratproof material installed
around the entire perimeter of the building. Apron material shall
be 26-gage or heavier galvanized-steel material or four-inch-thick
(102 mm) masonry or concrete material. Alternate material may be approved
at the discretion of the Building Department.
(2)
Grade floors. Where continuous concrete grade floor slabs are constructed,
open spaces shall not be left between the slab and walls.
C.
All
openings shall be protected as follows:
(1)
Wall or apron openings required for ventilation or other purposes
shall be guarded with corrosion-resistant ratproof shields of not
less than nominal 0.034-inch (0.032 inch) or nominal 0.064-inch expanded-steel
or wire-mesh screen, with not more than one-half-inch (13 mm) mesh
openings.
(2)
Slab openings shall be protected with concrete, masonry, metal or
other corrosion-resistant noncombustible cover of adequate strength
to support the floor loads.
(3)
All openings for pipe, conduit, cable and similar purposes at or
near grade shall have snugly fitted collars to eliminate all open
spaces.
(4)
Windows and doors must be gasket sealed or weather flashed for resistance
to rodent entry.
