ADOPTS WITH AMENDMENTS:

International Existing Building Code 2018 (IEBC 2018)

Heads up: There are no amended sections in this chapter.

The provisions of this chapter shall control the alteration, repair, addition and change of occupancy or relocation of existing buildings and structures, including historic buildings and structures as referenced in Section 301.3.1.

Exception: Existing bleachers, grandstands and folding and telescopic seating shall comply with ICC 300.

Alterations, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions of this chapter or with one of the methods provided in Section 301.3.

Where approved by the code official, buildings where an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 of the Florida Building Code, Building has been added, and the building is now sprinklered throughout, the required fire-resistance ratings of building elements and materials shall be permitted to meet the requirements of the current building code. The building is required to meet the other applicable requirements of the Florida Building Code, Building.

Plans, investigation and evaluation reports, and other data shall be submitted indicating which building elements and materials the applicant is requesting the code official to review and approve for determination of applying the current building code fire-resistance ratings. Any special construction features, including fire-resistance-rated assemblies and smoke-resistive assemblies, conditions of occupancy, means-of-egress conditions, fire code deficiencies, approved modifications or approved alternative materials, design and methods of construction, and equipment applying to the building that impact required fire-resistance ratings shall be identified in the evaluation reports submitted.

Except as otherwise required or permitted by this code, materials permitted by the applicable code for new construction shall be used. Like materials shall be permitted for alterations, provided no hazard to life, health or property is created. Hazardous materials shall not be used where the code for new construction would not permit their use in buildings of similar occupancy, purpose and location.
The building official shall have the authority to require the elimination of conditions deemed dangerous.
Additions to any building or structure shall comply with the requirements of the Florida Building Code, Building for new construction. Alterations to the existing building or structure shall be made to ensure that the existing building or structure together with the addition are no less conforming to the provisions of the Florida Building Code, Building than the existing building or structure was prior to the addition. An existing building together with its additions shall comply with the height and area provisions of Chapter 5 of the Florida Building Code, Building.

For buildings and structures in flood hazard areas established in Section 1612.3 of the Florida Building Code, Building, or Section R322 of the Florida Building Code, Residential, as applicable, any addition that constitutes substantial improvement of the existing structure shall comply with the flood design requirements for new construction, and all aspects of the existing structure shall be brought into compliance with the requirements for new construction for flood design.

For buildings and structures in flood hazard areas established in Section 1612.3 of the Florida Building Code, Building, or Section R322 of the Florida Building Code, Residential, as applicable, any additions that do not constitute substantial improvement of the existing structure are not required to comply with the flood design requirements for new construction.

Any existing gravity load-carrying structural element for which an addition and its related alterations cause an increase in design gravity load of more than 5 percent shall be strengthened, supplemented, replaced or otherwise altered as needed to carry the increased gravity load required by the Florida Building Code, Building for new structures. Any existing gravity load-carrying structural element whose gravity load-carrying capacity is decreased shall be considered an altered element subject to the requirements of Section 503.3. Any existing element that will form part of the lateral load path for any part of the addition shall be considered an existing lateral load-carrying structural element subject to the requirements of Section 502.4.
Where the addition does not result in increased design live load, existing gravity load-carrying structural elements shall be permitted to be evaluated and designed for live loads approved prior to the addition. If the approved live load is less than that required by Section 1607 of the Florida Building Code, Building, the area designed for the nonconforming live load shall be posted with placards of approved design indicating the approved live load. Where the addition does result in increased design live load, the live load required by Section 1607 of the Florida Building Code, Building shall be used.

Where the addition is structurally independent of the existing structure, existing lateral load-carrying structural elements shall be permitted to remain unaltered. Where the addition is not structurally independent of the existing structure, the existing structure and its addition acting together as a single structure shall be shown to meet the requirements of Sections1609 and 1613 (the High-Velocity Hurricane Zone shall comply with Section 1620) of the Florida Building Code, Building.

Exception: Any existing lateral load-carrying structural element whose demand-capacity ratio with the addition considered is no more than 10 percent greater than its demand-capacity ratio with the addition ignored shall be permitted to remain unaltered. For purposes of calculating demand-capacity ratios, the demand shall consider applicable load combinations with design lateral loads or forces in accordance with Sections 1609 and 1613 of the Florida Building Code, Building. For purposes of this exception, comparisons of demand-capacity ratios and calculation of design lateral loads, forces and capacities shall account for the cumulative effects of additions and alterations since original construction.

Where an addition is made to a building or structure of a Group R or I-1 occupancy, the existing building shall be provided with smoke alarms in accordance with the Florida Fire Prevention Code.
An addition to an existing building shall be equipped with carbon monoxide alarms in accordance with the Florida Fire Prevention Code, Section 915 of the Florida Building Code, Building, or Section R315 of the Florida Building Code, Residential, as applicable.

Except as provided by Sections 302.3, 302.4, or this section, alterations to any building or structure shall comply with the requirements of the Florida Building Code, Building for new construction. Alterations shall be such that the existing building or structure is no less conforming to the provisions of the Florida Building Code, Building than the existing building or structure was prior to the alteration.

Exceptions:

  1. An existing stairway shall not be required to comply with the requirements of Section 1011 of the Florida Building Code, Building where the existing space and construction does not allow a reduction in pitch or slope.
  2. Handrails otherwise required to comply with Section 1011.11 of the Florida Building Code, Building shall not be required to comply with the requirements of Section 1014.6 of the Florida Building Code, Building regarding full extension of the handrails where such extensions would be hazardous due to plan configuration.

For buildings and structures in flood hazard areas established in Section 1612.3 of the Florida Building Code, Building, or Section R322 of the Florida Building Code, Residential, as applicable, any alteration that constitutes substantial improvement of the existing structure shall comply with the flood design requirements for new construction, and all aspects of the existing structure shall be brought into compliance with the requirements for new construction for flood design.

For buildings and structures in flood hazard areas established in Section 1612.3 of the Florida Building Code, Building, or Section R322 of the Florida Building Code, Residential, as applicable, any alterations that do not constitute substantial improvement of the existing structure are not required to comply with the flood design requirements for new construction.

Any existing gravity load-carrying structural element for which an alteration causes an increase in design gravity load of more than 5 percent shall be strengthened, supplemented, replaced or otherwise altered as needed to carry the increased gravity load required by the Florida Building Code, Building for new structures. Any existing gravity load-carrying structural element whose gravity load-carrying capacity is decreased as part of the alteration shall be shown to have the capacity to resist the applicable design gravity loads required by the Florida Building Code, Building for new structures.
Where the alteration does not result in increased design live load, existing gravity load-carrying structural elements shall be permitted to be evaluated and designed for live loads approved prior to the alteration. If the approved live load is less than that required by Section 1607 of the Florida Building Code, Building, the area designed for the nonconforming live load shall be posted with placards of approved design indicating the approved live load. Where the alteration does result in increased design live load, the live load required by Section 1607 of the Florida Building Code, Building shall be used.

Except as permitted by Section 503.5, where the alteration increases design lateral loads in accordance with Section 1609 or 1613 (the High-Velocity Hurricane Zone shall comply with Section 1620) of the Florida Building Code, Building, or where the alteration results in a prohibited structural irregularity as defined in ASCE 7, or where the alteration decreases the capacity of any existing lateral loadcarrying structural element, the structure of the altered building or structure shall be shown to meet the requirements of Sections 1609 and 1613 of the Florida Building Code, Building. For purposes of this section, compliance with ASCE 41, using a Tier 3 procedure and the two-level performance objective in Table 301.4.1 for the applicable risk category, shall be deemed to meet the requirements of Section 1613 (the HVHZ shall comply with Section 1620) of the Florida Building Code, Building.

Exception: Any existing lateral load-carrying structural element whose demand-capacity ratio with the alteration considered is no more than 10 percent greater than its demand-capacity ratio with the alteration ignored shall be permitted to remain unaltered. For purposes of calculating demand-capacity ratios, the demand shall consider applicable load combinations with design lateral loads or forces in accordance with Sections 1609 and 1613 (the HVHZ shall comply with Section 1620) of the Florida Building Code, Building. For purposes of this exception, comparisons of demand-capacity ratios and calculation of design lateral loads, forces and capacities shall account for the cumulative effects of additions and alterations since original construction.

Where the portion of the building undergoing the intended alteration exceeds 50 percent of the aggregate area of the building, and where the building is assigned to Seismic Design Category F, the structure of the altered building shall be shown to meet the earthquake design provisions of the Florida Building Code, Building. For purposes of this section, the earthquake loads need not be taken greater than 75 percent of those prescribed in Section 1613 of the Florida Building Code, Building for new buildings of similar occupancy, purpose and location. New structural members and connections required by this section shall comply with the detailing provisions of this code for new buildings of similar structure, purpose and location.
Where the intended alteration requires a permit for reroofing and involves removal of roofing materials from more than 25 percent of the roof area of a building assigned to Seismic Design Category D, E or F that has parapets constructed of unreinforced masonry, the work shall include installation of parapet bracing to resist out-of-plane seismic forces, unless an evaluation demonstrates compliance of such items. For purposes of this section, design seismic forces need not be taken greater than 75 percent of those that would be required for the design of similar nonstructural components in new buildings of similar purpose and location.
Where the portion of the building undergoing the intended alteration exceeds 50 percent of the aggregate area of the building, the building is assigned to Seismic Design Category C, D, E or F, and the building's structural system includes unreinforced masonry walls, the alteration work shall include installation of wall anchors at the roof line to resist seismic forces, unless an evaluation demonstrates compliance of existing wall anchorage. For purposes of this section, design seismic forces need not be taken greater than 75 percent of those that would be required for the design of new buildings of similar structure, purpose and location.
Where the portion of the building undergoing the intended alteration exceeds 50 percent of the aggregate area of the building, and where the building is assigned to Seismic Design Category C, D, E or F, parapets constructed of unreinforced masonry shall have bracing installed as needed to resist out-of-plane seismic forces, unless an evaluation demonstrates compliance of such items. For purposes of this section, design seismic forces need not be taken greater than 75 percent of those that would be required for the design of similar nonstructural components in new buildings of similar purpose and location.

Where the structural roof deck is removed from more than 30 percent of the structural diaphragm of a building or section of a building located where the ultimate design wind speed is greater than 115 mph (51 m/s) in accordance with Figure 1609.3(1) of the Florida Building Code, Building as defined in Section 1609 (the HVHZ shall comply with Section 1620) of the Florida Building Code, Building, roof diaphragms, connections of the roof diaphragm to roof framing members, and roof-to-wall connections shall be evaluated for the wind loads specified in Section 1609 of the Florida Building Code, Building, including wind uplift. If the diaphragms and connections in their current condition are not capable of resisting at least 75 percent of those wind loads, they shall be replaced or strengthened in accordance with the loads specified in Section 1609 of the Florida Building Code, Building.

Exception: This section does not apply to buildings permitted subject to the Florida Building Code.

Structural alterations that are intended exclusively to improve the lateral force-resisting system and are not required by other sections of this code shall not be required to meet the requirements of Section 1609 or Section 1613 of the Florida Building Code, Building, provided that:

  1. The capacity of existing structural systems to resist forces is not reduced;
  2. New structural elements are detailed and connected to existing or new structural elements as required by the Florida Building Code, Building for new construction;
  3. New or relocated nonstructural elements are detailed and connected to existing or new structural elements as required by the Florida Building Code, Building for new construction; and
  4. The alterations do not create a structural irregularity as defined in ASCE 7 or make an existing structural irregularity more severe.
Individual sleeping units and individual dwelling units in Group R and I-1 occupancies shall be provided with smoke alarms in accordance with the Florida Fire Prevention Code.
Where alterations affect the configuration of an area utilized as a refuge area, the capacity of the refuge area shall not be reduced below that required in Sections 503.11.1 through 503.11.3.
In Group I-2 and I-3 occupancies, the required capacity of the refuge areas for smoke compartments in accordance with Sections 407.5.1 and 408.6.2 of the Florida Building Code, Building shall be maintained.
In ambulatory care facilities required to be separated by Section 422.2 of the Florida Building Code, Building, the required capacity of the refuge areas for smoke compartments in accordance with Section 422.3.2 of the Florida Building Code, Building shall be maintained.
The required capacity of the refuge area for horizontal exits in accordance with Section 1026.4 of the Florida Building Code, Building shall be maintained.
One-family and two-family dwellings and townhomes undergoing a repair, or a Level 1 alteration as defined in the Florida Building Code, may use smoke alarms powered by 10-year nonremovable, nonreplaceable batteries in lieu of retrofitting such dwelling with smoke alarms powered by the dwelling's electrical system. A battery-powered smoke alarm that is newly installed or replaces an existing battery-powered smoke alarm as a result of a level 1alteration must be powered by a nonremovable, nonreplaceable battery that powers the alarm for at least 10 years. The battery requirements of this section do not apply to a fire alarm, smoke detector, smoke alarm, or ancillary component that is electronically connected as a part of a centrally monitored or supervised alarm system, that uses a low-power, radio frequency wireless communication signal; or that contains multiple sensors, such as a smoke alarm combined with a carbon monoxide alarm or other multisensor devices, and is approved and listed by a nationally recognized testing laboratory.

Where the work area exceeds 50 percent of the building area and work involves a substantial structural alteration, the lateral load resisting system of the altered building shall satisfy the requirements of Sections 1609 and 1613 of the Florida Building Code, Building. Reduced seismic forces shall be permitted.

Exceptions:

  1. Buildings of Group R occupancy with no more than five dwelling or sleeping units used solely for residential purposes that are altered based on the conventional light-frame construction methods of the Florida Building Code, Building or in compliance with the provisions of the Florida Building Code, Residential.
  2. Where the intended alteration involves only the lowest story of a building, only the lateral loadresisting components in and below that story need comply with this section.
Fire escapes shall be permitted only as provided for in Sections 504.1.1 through 504.1.4.
Fire escapes shall not constitute any part of the required means of egress in new buildings.
Existing fire escapes shall continue to be accepted as a component in the means of egress in existing buildings only.
New fire escapes for existing buildings shall be permitted only where exterior stairways cannot be utilized due to lot lines limiting stairway size or due to the sidewalks, alleys or roads at grade level. New fire escapes shall not incorporate ladders or access by windows.
Fire escapes shall comply with this section and shall not constitute more than 50 percent of the required number of exits nor more than 50 percent of the required exit capacity.
Where located on the front of the building and where projecting beyond the building line, the lowest landing shall be not less than 7 feet (2134 mm) or more than 12 feet (3658 mm) above grade, and shall be equipped with a counterbalanced stairway to the street. In alleyways and thoroughfares less than 30 feet (9144 mm) wide, the clearance under the lowest landing shall be not less than 12 feet (3658 mm).
The fire escape shall be designed to support a live load of 100 pounds per square foot (4788 Pa) and shall be constructed of steel or other approved noncombustible materials. Fire escapes constructed of wood not less than nominal 2 inches (51 mm) thick are permitted on buildings of Type V construction. Walkways and railings located over or supported by combustible roofs in buildings of Type III and IV construction are permitted to be of wood not less than nominal 2 inches (51 mm) thick.
Stairways shall be at least 22 inches (559 mm) wide with risers not more than, and treads not less than, 8 inches (203 mm) and landings at the foot of stairways not less than 40 inches (1016 mm) wide by 36 inches (914 mm) long, located not more than 8 inches (203 mm) below the door.
Doors and windows along the fire escape shall be protected with 3/4-hour opening protectives.
The installation or replacement of glass shall be as required for new installations.

In Group R-2 or R-3 buildings containing dwelling units and one- and two-family dwellings and townhouses regulated by the Florida Building Code, Residential, window opening control devices complying with ASTM F2090 shall be installed where an existing window is replaced and where all of the following apply to the replacement window:

  1. The window is operable;
  2. The window replacement includes replacement of the sash and the frame;
  3. One of the following applies:

    1. 3.1. In a Group R-2 or R-3 building containing dwelling units, the top of the sill of the window opening is at a height less than 36 inches (915 mm) above the finished floor; or
    2. 3.2. In one- and two-family dwellings and townhouses regulated by the Florida Building Code, Residential, the top sill of the window opening is at a height less than 24 inches (610 mm) above the finished floor;
  4. The window will permit openings that will allow passage of a 4-inch-diameter (102 mm) sphere when the window is in its largest opened position; and
  5. The vertical distance from the top of the sill of the window opening to the finished grade or other surface below, on the exterior of the building, is greater than 72 inches (1829 mm).

The window opening control device, after operation to release the control device allowing the window to fully open, shall not reduce the minimum net clear opening area of the window unit to less than the area required by Section 1030.2 of the Florida Building Code, Building.

Exceptions:

  1. Operable windows where the top of the sill of the window opening is located more than 75 feet (22 860 mm) above the finished grade or other surface below, on the exterior of the room, space or building, and that are provided with window fall prevention devices that comply with ASTM F2006.
  2. Operable windows with openings that are provided with window fall prevention devices that comply with ASTM F2090.

Where windows are required to provide emergency escape and rescue openings in Group R-2 and R-3 occupancies and one- and two-family dwellings and townhouses regulated by the Florida Building Code, Residential, replacement windows shall be exempt from the requirements of Sections 1030.2, 1030.3 and 1030.5 of the Florida Building Code, Building and Sections R310.2.1, R310.2.2 and R310.2.3 of the Florida Building Code, Residential, provided the replacement window meets the following conditions:

  1. The replacement window is the manufacturer's largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be permitted to be of the same operating style as the existing window or a style that provides for an equal or greater window opening area than the existing window.
  2. The replacement of the window is not part of a change of occupancy.

Window opening control devices complying with ASTM F2090 shall be permitted for use on windows required to provide emergency escape and rescue openings.

No change shall be made in the use or occupancy of any building unless such building is made to comply with the requirements of the Florida Building Code, Building for the use or occupancy. Changes in use or occupancy in a building or portion thereof shall be such that the existing building is no less complying with the provisions of this code than the existing building or structure was prior to the change. Subject to the approval of the building official, the use or occupancy of existing buildings shall be permitted to be changed and the building is allowed to be occupied for purposes in other groups without conforming to all of the requirements of this code for those groups, provided the new or proposed use is less hazardous, based on life and fire risk, than the existing use.

Exceptions:

  1. The building need not be made to comply with the seismic requirements for a new structure unless required by Section 506.4.
  2. A single-family or two-family dwelling that is converted into a certified recovery residence, as defined in s. 397.311, Florida Statutes or a recovery residence, as defined in s. 397.311, Florida Statutes that has a charter from an entity recognized or sanctioned by Congress does not have a change of occupancy as defined in this Code solely due to such conversion.
A change in occupancy with no change of occupancy classification shall not be made to any structure that will subject the structure to any special provisions of the applicable Florida Building Code, without approval of the building official. Compliance shall be only as necessary to meet the specific provisions and is not intended to require the entire building be brought into compliance.
A certificate of occupancy shall be issued where it has been determined that the requirements for the new occupancy classification have been met.
An existing stairway shall not be required to comply with the requirements of Section 1011 of the Florida Building Code, Building where the existing space and construction does not allow a reduction in pitch or slope.

When a change of occupancy results in a structure being reclassified to a higher risk category, the structure shall conform to the seismic requirements for a new structure of the higher risk category. For purposes of this section, compliance with ASCE 41, using a Tier 3 procedure and the two-level performance objective in Table 301.4.1 for the applicable risk category, shall be deemed to meet the requirements of Section 1613 of the Florida Building Code, Building.

Exceptions:

  1. Specific seismic detailing requirements of Section 1613 of the Florida Building Code, Building for a new structure shall not be required to be met where the seismic performance is shown to be equivalent to that of a new structure. A demonstration of equivalence shall consider the regularity, overstrength, redundancy and ductility of the structure.
  2. When a change of use results in a structure being reclassified from Risk Category I or II to Risk Category III and the structure is located where the seismic coefficient, SDS, is less than 0.33, compliance with the seismic requirements of Section 1613 of the Florida Building Code, Building is not required.
See the provisions of the Florida Building Code, Accessibility.
Reserved.
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The provisions of Section 706, Existing Roofing of this code, shall govern requirements of all reroofing work performed under this code.
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