R105.3.1.1 Determination of substantially improved or substantially
damaged existing buildings.
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(1)
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Requirements: An alteration to any structure shall conform to
the code requirements for a new structure and shall not result in
an increase in hazard to the occupants. Portions of the structure
not altered and not affected by the alteration are not required to
comply with the code requirements for a new structure except as specified
in this code.
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(2)
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Damaged structures: If a structure is damaged by fire or any
other cause, the renovation shall be considered an alteration and
comply with this code.
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(3)
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Alterations exceeding fifty percent (50%): If alterations or
repairs are to be made within any period of twelve (12) consecutive
months, costing in excess of fifty percent (50%) of the estimated
value of the structure, the requirements of this code for new structures
shall apply. At the discretion of the code official, alterations required
to resist earthquake loads may be phased as renovations to different
portions of a structure occur.
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(4)
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Damages exceeding fifty percent (50%): If the structure is damaged
by fire or any other cause to an extent in excess of fifty percent
(50%) of the estimated value of the structure before the damage was
incurred, this code's requirements for new structures shall apply.
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(5)
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Alterations under fifty percent (50%): If the cost of alterations
or repairs to be made within any period of twelve (12) consecutive
months is between twenty-five percent (25%) and fifty percent (50%)
of the estimated value of the structure, the code official shall determine
to what degree the portions so altered or repaired shall be made to
conform to the requirements for new structures to insure the safety,
health and general welfare of the occupants and the public.
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(6)
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Alterations under twenty-five percent (25%): If the cost of
alterations or repairs to be made within twelve (12) consecutive months
is twenty-five percent (25%) or less of the estimated value of the
structure, the code official shall permit the restoration of the structure
to its condition previous to damage or deterioration with the same
kind of materials as those of which the structure was previously constructed,
provided that such construction does not endanger the general safety
and public welfare and complies with the provisions of Chapter 9 for
existing roofs.
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R106.1 Submittal documents: The construction documents for new
construction, alteration, repairs, expansion, addition or modification
for buildings or structures shall be prepared by a registered design
professional. All construction documents shall be prepared by the
appropriate registered design professional consistent with the professional
registration laws of the State of Missouri. The construction documents
shall include the name and address of the registered design professional
and shall be signed, sealed and dated by the registered design professional
in accordance with Section 106.1.A
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Exceptions:
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(1)
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Miscellaneous structures related to buildings of one- and two-family
dwellings such as room additions, carports, garages, sheds and other
similar structures unless the code official determines a registered
design professional is needed to assure a safe construction design.
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(2)
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Work of a minor nature approved by the code official in accordance
with Section 105.2.
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TABLE R301.2(1)
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CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
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Ground Snow Load: 20, Wind Speed (mph): 115, Topographic Effects:
No, Special wind region: No, Windborne debris zone: No, Seismic Design
Category: C, Weathering: Severe, Frost line depth: thirty (30) inches,
Termite: Moderate to Heavy, Winter Design Temp: twenty degrees Fahrenheit
(20° F.), Ice Barrier Underlayment Required: YES, Flood Hazards:
February 2015, Air Freezing Index: fifteen hundred (1,500) days, Mean
Annual Temp: fifty-five degrees Fahrenheit (55° F.).
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