ADOPTS WITH AMENDMENTS:

International Building Code 2018 (IBC 2018)

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

14B-14-1401 The provisions of Section 1401 of IBC are adopted by reference without modification.

Added Coun. J. 4-10-19, p. 100029.

The provisions of this chapter shall establish the minimum requirements for exterior walls; exterior wall coverings; exterior wall openings; exterior windows and doors; and architectural trim.

14B-14-1402 The provisions of Section 1402 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Amended Coun. J. 2-19-20, p. 14474.

The provisions of this section shall apply to exterior walls, wall coverings and components thereof.

Exterior walls shall provide the building with a weather-resistant exterior wall envelope. The exterior wall envelope shall include flashing, as described in Section 1404.4. The exterior wall envelope shall be designed and constructed in such a manner as to prevent the accumulation of water within the wall assembly by providing a water-resistive barrier behind the exterior veneer, as described in Section 1403.2, and a means for draining water that enters the assembly to the exterior. Protection against condensation in the exterior wall assembly shall be provided in accordance with Section 1404.3.

Exceptions:

  1. A weather-resistant exterior wall envelope shall not be required over concrete or masonry walls designed in accordance with Chapters 19 and 21, respectively.
  2. [Reserved]
  3. Exterior insulation and finish systems (EIFS) complying with Section 1407.4.1.
Exterior walls, and the associated openings, shall be designed and constructed to resist safely the superimposed loads required by Chapter 16.
Exterior walls, including fire-resistant joint systems, shall be fire-resistance rated as required by other sections of this code with opening protection as required by Chapter 7.

Exterior walls on buildings of Type I, II, III or IV construction that are greater than 40 feet (12 192 mm) in height above grade plane and contain a combustible water-resistive barrier or air barrier shall be tested in accordance with and comply with the acceptance criteria of NFPA 285. For the purposes of this section, fenestration products, flashing of fenestration products and flashing and accessories at other locations, including through-wall flashings, shall not be considered part of the water-resistive barrier.

Exceptions:

  1. Walls in which the water-resistive barrier or air barrier required by the Chicago Energy Conservation Code is the only combustible component and the exterior wall has an exterior wall covering of brick, concrete, stone, terracotta, stucco or steel with minimum thicknesses in accordance with Table 1404.2.
  2. Walls in which the water-resistive barrier or air barrier required by the Chicago Energy Conservation Code is the only combustible component and the water-resistive barrier or air barrier required by the Chicago Energy Conservation Code has a peak heat release rate of less than 150 kW/m2, a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than 18 MJ/kg as determined in accordance with ASTM E1354 and has a flame spread index of 25 or less and a smoke-developed index of 450 or less as determined in accordance with ASTM E84 or UL 723. The ASTM E1354 test shall be conducted on specimens at the thickness intended for use, in the horizontal orientation and at an incident radiant heat flux of 50 kW/m2.
Exterior walls shall meet additional performance requirements found in the Chicago Energy Conservation Code.

14B-14-1403 The provisions of Section 1403 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Materials used for the construction of exterior walls shall comply with the provisions of this section. Materials not prescribed herein shall be permitted, provided that any such alternative has been approved.
Exterior walls of wood construction shall be designed and constructed in accordance with Chapter 23.
Basic hardboard shall conform to the requirements of ANSI A135.4.
Hardboard siding shall conform to the requirements of ANSI A135.6 and, where used structurally, shall be so identified by the label of an approved agency.
Wood shingles and shakes shall comply with Section 1507.8.5.
Exterior walls of masonry construction shall be designed and constructed in accordance with this section and Chapter 21. Masonry units, mortar and metal accessories used in anchored and adhered veneer shall meet the physical requirements of Chapter 21. The backing of anchored and adhered veneer shall be of concrete, masonry, metal framing or wood framing. Continuous insulation meeting the applicable requirements of this code shall be permitted between the backing and the masonry veneer.
Exterior walls constructed of cold-formed steel, structural steel or aluminum shall be designed in accordance with Chapters 22 and 20, respectively.
Aluminum siding shall conform to the requirements of AAMA 1402.
Copper shall conform to the requirements of ASTM B370.
Other metals, used as siding, shall conform to the applicable standard listed in Table 1507.4.3(1).
Exterior walls of concrete construction shall be designed and constructed in accordance with Chapter 19.
Exterior walls of glass-unit masonry shall be designed and constructed in accordance with Chapter 21.
Plastic panel, apron or spandrel walls as defined in this code shall not be limited in thickness, provided that such plastics and their assemblies conform to the requirements of Chapter 26 and are constructed of weather-resistant materials of adequate strength to resist the wind loads for cladding specified in Chapter 16.
Vinyl siding shall be certified and labeled as conforming to the requirements of ASTM D3679 by an approved agency.
Fiber-cement siding shall conform to the requirements of ASTM C1186, Type A (or ISO 8336, Category A), and shall be so identified on labeling listing an approved agency.

14B-14-1404 The provisions of Section 1404 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Amended Coun. J. 2-19-20, p. 14474.

Exterior wall coverings shall be designed and constructed in accordance with the applicable provisions of this section.

Exterior walls shall provide weather protection for the building. The materials of the minimum nominal thickness specified in Table 1404.2 shall be acceptable as weather coverings.

TABLE 1404.2

MINIMUM THICKNESS OF WEATHER COVERINGS

COVERING TYPE MINIMUM THICKNESS
(inches)
Adhered masonry veneer
Architectural cast stone 0.75
Other 0.25
Aluminum siding 0.019
Anchored masonry veneer
Stone (natural) 2.0
Architectural cast stone 1.25
Other 2.0
Cold-rolled copperd 0.0216 nominal
Copper shinglesd 0.0162 nominal
Exterior plywood (with sheathing) 0.313
Exterior plywood (without sheathing) See Section 2304.6
Fiber cement lap siding 0.25c
Fiber cement panel siding 0.25c
Fiberboard siding 0.5
Glass-fiber reinforced concrete panels 0.375
Hardboard sidingc 0.25
High-yield copperd 0.0162 nominal
Marble slabs 1
Particleboard (with sheathing) See Section 2304.6
Particleboard (without sheathing) See Section 2304.6
Porcelain tile 0.25
Steel (corrosion resistant) 0.0149
Structural glass 0.344
Stucco or exterior cement plaster
Three-coat work over:
Metal plaster base 0.875b
Unit masonry 0.625b
Cast-in-place or precast concrete 0.625b
Two-coat work over:
Unit masonry 0.5b
Cast-in-place or precast concrete 0.375b
Terra cotta (anchored) 1
Terra cotta (adhered) 0.25
Vinyl siding 0.035
Wood shingles 0.375
Wood siding (without sheathing)a 0.5

For SI: 1 inch = 25.4 mm, 1 ounce = 28.35 g, 1 square foot = 0.093 m2.

  1. Wood siding of thicknesses less than 0.5 inch shall be placed over sheathing that conforms to Section 2304.6.
  2. Exclusive of texture.
  3. As measured at the bottom of decorative grooves.
  4. 16 ounces per square foot for cold-rolled copper, 12 ounces per square foot for copper shingles and high-yield copper.
Vapor retarders as described in Section 1404.3.3 shall be provided in accordance with Sections 1404.3.1 and 1404.3.2, or a design using accepted engineering practice for hygrothermal analysis.

Class I or II vapor retarders shall be provided on the interior side of frame walls.

Exceptions:

  1. Basement walls.
  2. Below-grade portion of any wall.
  3. Construction where moisture or its freezing will not damage the materials.
  4. Conditions where Class III vapor retarders are required in Section 1404.3.2.

Class III vapor retarders shall be permitted where any one of the conditions in Table 1404.3.2 is met. Only Class III vapor retarders shall be used on the interior side of frame walls where foam plastic insulating sheathing with a perm rating of less than 1 is applied in accordance with Table 1404.3.2 on the exterior side of the frame wall.

TABLE 1404.3.2

CLASS III VAPOR RETARDERS

ZONE CLASS III VAPOR RETARDERS PERMITTED FOR:a
5 Vented cladding over wood structural panels
Vented cladding over fiberboard
Vented cladding over gypsum
Continuous insulation with R-value ≥ R5 over 2 × 4 wall
Continuous insulation with R-value ≥ R7.5 over 2 × 6 wall
  1. Spray foam with a maximum permanence of 1.5 perms at the installed thickness applied to the interior cavity side of wood structural panels, fiberboard, insulating sheathing or gypsum is deemed to meet the continuous insulation requirement where the spray foam R-value meets or exceeds the specified insulating sheathing R-value.

The vapor retarder class shall be based on the manufacturer's certified testing or a tested assembly.

The following shall be deemed to meet the class specified:

Class I: Sheet polyethylene, nonperforated aluminum foil with a perm rating of less than or equal to 0.1.
Class II: Kraft-faced fiberglass batts or paint with a perm rating greater than 0.1 and less than or equal to 1.0.
Class III: Latex or enamel paint with a perm rating of greater than 1.0 and less than or equal to 10.0.

For the purposes of this section, vented cladding shall include the following:

  1. Vinyl, or horizontal aluminum siding applied over a weather-resistive barrier as specified in this chapter.
  2. Brick veneer with a clear airspace as specified in this code.
  3. Other approved vented claddings.

1404.4 Flashing

ILLUSTRATION
Flashing, including end dams, shall be installed in such a manner so as to prevent moisture from entering the wall or to redirect that moisture to the exterior. Flashing shall be installed at the perimeters of exterior door and window assemblies, penetrations and terminations of exterior wall assemblies, exterior wall intersections with roofs, chimneys, porches, decks, balconies and similar projections and at built-in gutters and similar locations where moisture could enter the wall. Flashing with projecting flanges shall be installed on both sides and the ends of copings, under sills and continuously above projecting trim. Where self-adhered membranes are used as flashings of fenestration in wall assemblies, those self-adhered flashings shall comply with AAMA 711. Where fluid applied membranes are used as flashing for exterior wall openings, those fluid applied membrane flashings shall comply with AAMA 714.
In exterior walls of buildings or structures, wall pockets or crevices in which moisture can accumulate shall be avoided or protected with caps or drips, or other approved means shall be provided to prevent water damage.

1404.4.2 Masonry

ILLUSTRATION
Flashing and weep holes in anchored veneer designed in accordance with Section 1404.6 shall be located not more than 10 inches (245 mm) above finished ground level above the foundation wall or slab. At other points of support including structural floors, shelf angles and lintels, flashing and weep holes shall be located in the first course of masonry above the support.

Wood veneers on exterior walls of buildings of Type I, II, III and IV construction shall be not less than 1 inch (25 mm) nominal thickness and shall conform to the following:

  1. The veneer shall not exceed 40 feet (12 190 mm) in height above grade.
  2. The veneer is attached to or furred from a noncombustible backing that is fire-resistance rated as required by other provisions of this code.
  3. Where open or spaced wood veneers (without concealed spaces) are used, they shall not project more than 24 inches (610 mm) from the building wall.
Anchored masonry veneer shall comply with the provisions of Sections 1404.6 through 1404.9 and Sections 12.1 and 12.2 of TMS 402.
Anchored masonry veneers in accordance with Chapter 14 are not required to meet the tolerances in Article 3.3 F1 of TMS 602.
Anchored masonry veneer located in Seismic Design Category C, D, E or F shall conform to the requirements of Section 12.2.2.11 of TMS 402.
Anchored stone veneer units not exceeding 10 inches (254 mm) in thickness shall be anchored directly to masonry, concrete or to metal stud construction by corrosion-resistant clips or anchors located in the edge or back of the units. Veneer anchors shall be capable of resisting a force equal to two times the weight of the attached veneer in tension and compression.
Terra cotta or ceramic units not less than 15/8 inches (41 mm) thick shall be anchored directly to masonry, concrete or metal stud construction. The facing shall be tied to the backing with corrosion-resistant metal anchors. The veneer anchors shall have sufficient strength to support twice the weight of the veneer in tension.
Adhered masonry veneer shall comply with the applicable requirements in this section and Sections 12.1 and 12.3 of TMS 402.
Exterior adhered masonry veneer shall be installed in accordance with Section 1404.10 and the manufacturer's instructions.
Flashing shall comply with the applicable requirements of Section 1404.4 and the following.
A corrosion-resistant screed or flashing shall be installed to extend below the foundation plate line on exterior stud walls in accordance with Section 1404.4. The water-resistive barrier shall lap over the exterior of the attachment flange of the screed or flashing.
On exterior stud walls, adhered masonry veneer shall be installed not less than 4 inches (102 mm) above the earth, or not less than 2 inches (51 mm) above paved areas, or not less than 1/2 inch (12.7 mm) above exterior walking surfaces that are supported by the same foundation that supports the exterior wall.
Exterior adhered masonry veneer installed with lath and mortar shall comply with the following.
Lathing shall comply with the requirements of Section 2510.
A nominal 1/2-inch-thick (12.7 mm) layer of mortar complying with the material requirements of Sections 2103 and 2512.2 shall be applied, encapsulating the lathing. The surface of this mortar shall be scored horizontally, resulting in a scratch coat.
The masonry veneer units shall be adhered to the mortar scratch coat with a nominal 1/2-inch-thick (12.7 mm) setting bed of mortar complying with Sections 2103 and 2512.2 applied to create a full setting bed for the back of the masonry veneer units. The masonry veneer units shall be worked into the setting bed resulting in a nominal 3/8-inch (9.5 mm) setting bed after the masonry veneer units are applied.
Adhered masonry veneer applied directly to masonry or concrete shall comply with the applicable requirements of Section 1404.10 and with the requirements of Section 1404.10.1.4 or 2510.7.
Cold weather construction of adhered masonry veneer shall comply with the requirements of Sections 2104 and 2512.4.
Hot weather construction of adhered masonry veneer shall comply with the requirements of Section 2104.
Adhered porcelain tile units shall not exceed 5/8 inch (15.8 mm) thickness and 24 inches (610 mm) in any face dimension nor more than 3 square feet (0.28 m2) in total face area and shall not weigh more than 9 pounds psf (0.43 kN/m2). Porcelain tile shall be adhered to a backing system.
Interior adhered masonry veneers shall have a maximum weight of 20 psf (0.958 kg/m2) and shall be installed in accordance with Section 1404.10. Where the interior adhered masonry veneer is supported by wood construction, the supporting members shall be designed to limit deflection to 1/600 of the span of the supporting members.
Veneers of metal shall be fabricated from corrosion-resistant materials or shall be protected front and back with porcelain enamel, or otherwise be treated to render the metal resistant to corrosion.
Exterior metal veneer shall be securely attached to the supporting masonry or framing members with corrosion-resistant fastenings, metal ties or by other approved devices or methods. Such attachments and their supports shall be designed and constructed to resist the wind loads as specified in Section 1609 for components and cladding
Metal supports for exterior metal veneer shall be corrosion-resistant. Wood studs, furring strips or other wood supports for exterior metal veneer shall be pressure-treated wood or protected as required in Section 1402.2. Joints and edges exposed to the weather shall be caulked with durable waterproofing material or by other approved means to prevent penetration of moisture.
Masonry backup shall not be required for metal veneer unless required by the fire-resistance requirements of this code.
Grounding of metal veneers on buildings shall comply with the requirements of Chapter 27 of this code.
The area of a single section of thin exterior structural glass veneer shall not exceed 10 square feet (0.93 m2) where that section is not more than 15 feet (4572 mm) above the level of the sidewalk or grade level directly below, and shall not exceed 6 square feet (0.56 m2) where it is more than 15 feet (4572 mm) above that level.
The length or height of any section of thin exterior structural glass veneer shall not exceed 48 inches (1219 mm).
The thickness of thin exterior structural glass veneer shall be not less than 0.344 inch (8.7 mm).
Where glass extends to a sidewalk surface, each section shall rest in an approved metal molding, and be set not less than 1/4 inch (6.4 mm) above the highest point of the sidewalk. The space between the molding and the sidewalk shall be thoroughly caulked and made watertight.
Where thin exterior structural glass veneer is installed above the level of the top of a bulkhead facing, or at a level more than 36 inches (914 mm) above the sidewalk level, the mastic cement binding shall be supplemented with nonferrous metal shelf angles located in the horizontal joints in every course. Such shelf angles shall be not less than 0.0478-inch (1.2 mm) thick and not less than 2 inches (51 mm) long, with not less than two angles for each glass unit. Shelf angles shall be secured to the wall or backing with expansion bolts, toggle bolts or by other approved methods.
Unless otherwise specifically approved by the building official, abutting edges of thin exterior structural glass veneer shall be ground square. Horizontal joints shall be held to not less than 0.063 inch (1.6 mm) by a nonrigid substance or device. Where thin exterior structural glass veneer abuts nonresilient material at sides or top, expansion joints not less than 1/4 inch (6.4 mm) wide shall be provided.
Thin exterior structural glass veneer installed above the level of the heads of show windows and veneer installed more than 12 feet (3658 mm) above ground level shall, in addition to the mastic cement and shelf angles, be held in place by the use of fastenings at each vertical or horizontal edge, or at the four corners of each glass unit. Fastenings shall be secured to the wall or backing with expansion bolts, toggle bolts or by other methods. Fastenings shall be so designed as to hold the glass veneer in a vertical plane independent of the mastic cement. Shelf angles providing both support and fastenings shall be permitted.
Exposed edges of thin exterior structural glass veneer shall be flashed with overlapping corrosion-resistant metal flashing and caulked with a waterproof compound in a manner to effectively prevent the entrance of moisture between the glass veneer and the backing.
Windows and doors installed in exterior walls shall conform to the testing and performance requirements of Section 1709.5.
Windows and doors shall be installed in accordance with manufacturer's written instructions or an engineering analysis. Fastener size and spacing shall be provided in such instructions and shall be calculated based on maximum loads and spacing used in the test or analysis.
Vinyl siding conforming to the requirements of this section and complying with ASTM D3679 shall be permitted on exterior walls of buildings where the building height is less than or equal to 45 feet (13716 mm). Vinyl siding shall be secured to the building so as to provide weather protection for the exterior walls of the building.
The siding shall be applied over sheathing or materials listed in Section 2304.6. Siding shall be applied to conform to the water-resistive barrier requirements in Section 1402. Siding and accessories shall be installed in accordance with manufacturer's written instructions. Unless otherwise specified in the manufacturer's instructions, nails used to fasten the siding and accessories shall have a minimum 0.313-inch (7.9 mm) head diameter and 1/8-inch (3.18 mm) shank diameter. The nails shall be corrosion resistant and shall be long enough to penetrate the studs or nailing strip not less than 3/4 inch (19 mm). For cold-formed steel light-frame construction, corrosion-resistant fasteners shall be used. Screw fasteners shall penetrate the cold-formed steel framing not fewer than three exposed threads. Other fasteners shall be installed in accordance with the permitted construction documents and manufacturer's instructions. Where the siding is installed horizontally, the fastener spacing shall not exceed 16 inches (406 mm) horizontally and 12 inches (305 mm) vertically. Where the siding is installed vertically, the fastener spacing shall not exceed 12 inches (305 mm) horizontally and 12 inches (305 mm) vertically.
Cement plaster applied to exterior walls shall conform to the requirements specified in Chapter 25.
Fiber-cement siding complying with Section 1403.10 shall be allowed on exterior walls of Type I, II, III, IV and V construction for wind pressure resistance or wind speed exposures as indicated by the manufacturer's listing and label and installation instructions. Where specified, the siding shall be installed over sheathing or materials listed in Section 2304.6 and shall be installed to conform to the water-resistive barrier requirements in Section 1402. Siding and accessories shall be installed in accordance with manufacturer's instructions. Unless otherwise specified in the manufacturer's instructions, nails used to fasten the siding to wood studs shall be corrosion-resistant round head smooth shank and shall be long enough to penetrate the studs not less than 1 inch (25 mm). For cold-formed steel light-frame construction, corrosion-resistant fasteners shall be used. Screw fasteners shall penetrate the cold-formed steel framing not fewer than three exposed full threads. Other fasteners shall be installed in accordance with the permitted construction documents and manufacturer's instructions.
Fiber-cement panels shall comply with the requirements of ASTM C1186, Type A, minimum Grade II (or ISO 8336, Category A, minimum Class 2). Panels shall be installed with the long dimension either parallel or perpendicular to framing. Vertical and horizontal joints shall occur over framing members and shall be protected with caulking, with battens or flashing, or be vertical or horizontal shiplap or otherwise designed to comply with Section 1402.2. Panel siding shall be installed with fasteners in accordance with the manufacturer's instructions.
Fiber-cement lap siding having a maximum width of 12 inches (305 mm) shall comply with the requirements of ASTM C1186, Type A, minimum Grade II (or ISO 8336, Category A, minimum Class 2). Lap siding shall be lapped not less than 11/4 inches (32 mm) and lap siding not having tongue-and-groove end joints shall have the ends protected with caulking, covered with an H-section joint cover, located over a strip of flashing or shall be otherwise designed to comply with Section 1402.2. Lap siding courses shall be installed with the fastener heads exposed or concealed in accordance with the manufacturer's instructions.
Weather boarding and wall coverings shall be securely fastened with aluminum, copper, zinc, zinc-coated or other corrosion-resistant fasteners in accordance with the nailing schedule in Table 2304.10.1 or the manufacturer's instructions. Shingles and other weather coverings shall be attached with appropriate standard-shingle nails to furring strips securely nailed to studs, or with mechanically bonding nails, except where sheathing is of wood not less than 1-inch (25 mm) nominal thickness or of wood structural panels as specified in Table 2308.6.3(3).

14B-14-1405 The provisions of Section 1405 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Combustible exterior wall coverings shall comply with this section.

Exception: Plastics complying with Chapter 26.

On buildings of Types I, II, III and IV construction, exterior wall coverings shall be permitted to be constructed of combustible materials, complying with the following limitations:

  1. Combustible exterior wall coverings shall not exceed 10 percent of an exterior wall surface area where the fire separation distance is 15 feet (4572 mm) or less.
  2. Combustible exterior wall coverings shall be limited to 40 feet (12 192 mm) in height above grade plane.
  3. [Reserved]
  4. Wood veneers shall comply with this section and Section 1404.5.

Where permitted by Section 1405.1.1, combustible exterior wall coverings shall be tested in accordance with NFPA 268.

Exceptions:

  1. Wood or wood-based products.
  2. Other combustible materials covered with an exterior weather covering, other than vinyl sidings, included in and complying with the thickness requirements of Table 1404.2.
  3. Aluminum having a minimum thickness of 0.019 inch (0.48 mm).
Where installed on exterior walls having a fire separation distance of 15 feet (4572 mm) or less, combustible exterior wall coverings shall not exhibit sustained flaming as defined in NFPA 268.

For fire separation distances greater than 15 feet (4572 mm), any exterior wall covering shall be allowed that has been exposed to a reduced level of incident radiant heat flux in accordance with the NFPA 268 test method without exhibiting sustained flaming. The minimum fire separation distance required for the exterior wall covering shall be determined from Table 1405.1.1.1.2 based on the maximum tolerable level of incident radiant heat flux that does not cause sustained flaming of the exterior wall covering.

TABLE 1405.1.1.1.2

MINIMUM FIRE SEPARATION FOR COMBUSTIBLE EXTERIOR WALL COVERINGS

FIRE SEPARATION DISTANCE
(feet)
TOLERABLE LEVEL INCIDENT
RADIANT HEAT ENERGY (kW/m2)
greater than 15 5.9
17 5.5
18 5.2
19 4.9
20 4.6
21 4.4
22 4.1
23 3.9
24 3.7
25 3.5

For SI: 1 foot = 304.8 mm, 1 Btu/H2 • °F = 0.0057 kW/m2 • K.

Combustible exterior wall coverings located along the top of exterior walls shall be completely backed up by the exterior wall and shall not extend over or above the top of the exterior wall.

Where the combustible exterior wall covering is furred out from the exterior wall and forms a solid surface, the distance between the back of the exterior wall covering and the exterior wall shall not exceed 15/8 inches (41 mm). The concealed space thereby created shall be fireblocked in accordance with Section 718.

Exception: The distance between the back of the exterior wall covering and the exterior wall shall be permitted to exceed 15/8 inches (41 mm) where the concealed space is not required to be fireblocked by Section 718.

14B-14-1406 The provisions of Section 1406 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

The provisions of this section shall govern the materials, construction and quality of metal composite materials (MCM) for use as exterior wall coverings in addition to other applicable requirements of Chapters 14 and 16.
MCM used as exterior wall finish or as elements of balconies and similar projections and bay and oriel windows to provide cladding or weather resistance shall comply with Sections 1406.4 through 1406.14.
MCM used as architectural trim or embellishments shall comply with Sections 1406.7 through 1406.14.
MCM systems shall be designed and constructed to resist wind loads as required by Chapter 16 for components and cladding.
Results of tests or an engineering analysis shall be submitted to the building official as part of the construction documents to demonstrate compliance with the requirements of Chapter 16 for wind loads.
MCM systems shall comply with Section 1402 and shall be designed and constructed to resist wind and rain in accordance with this section and the manufacturer's installation instructions.
MCM systems shall be constructed of materials that maintain the performance characteristics required in Section 1406 for the duration of use.

Where MCM systems are used on exterior walls required to have a fire-resistance rating in accordance with Section 705, evidence shall be submitted to the building official that the required fire-resistance rating is maintained.

Exception: MCM systems not containing foam plastic insulation, which are installed on the outer surface of a fire-resistance-rated exterior wall in a manner such that the attachments do not penetrate through the entire exterior wall assembly, shall not be required to comply with this section.

Unless otherwise specified, MCM shall have a flame spread index of 75 or less and a smoke-developed index of 450 or less when tested in the maximum thickness intended for use in accordance with ASTM E84 or UL 723.
Where installed on buildings of Type I, II, III and IV construction, MCM systems shall comply with Sections 1406.10.1 through 1406.10.4, or Section 1406.11.
MCM shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 450 when tested as an assembly in the maximum thickness intended for use in accordance with ASTM E84 or UL 723.
MCM shall be separated from the interior of a building by a thermal barrier consisting of 1/2 -inch (12.7 mm) gypsum wallboard or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275.

The thermal barrier specified for MCM in Section 1406.10.2 is not required where:

  1. The MCM system has passed tests conducted in accordance with NFPA 286 and the acceptance criteria of Section 803.1.1.1, UL 1040 or UL 1715. Such testing shall be performed with the MCM in the maximum thickness intended for use. The MCM system shall include seams, joints and other typical details used in the installation and shall be tested in the manner intended for use.
  2. The MCM is used as elements of balconies and similar projections, architectural trim or embellishments.
The MCM system shall be tested in accordance with, and comply with, the acceptance criteria of NFPA 285. Such testing shall be performed on the MCM system with the MCM in the maximum thickness intended for use.
Where approved by the building official, MCM and MCM systems shall not be required to comply with Sections 1406.10.1 through 1406.10.4 provided that such systems comply with Section 1406.11.1.
MCM shall not be installed more than 40 feet (12 190 mm) in height above grade plane where installed in accordance with Sections 1406.11.1.1 and 1406.11.1.2.
Where the fire separation distance is 15 feet (4572 mm) or less, the area of MCM shall not exceed 10 percent of the exterior wall surface.

Where the fire separation distance is greater than 15 feet (4572 mm), the area of exterior wall surface coverage using MCM shall not be limited.

MCM shall be permitted to be installed on buildings of Type V construction.
MCM systems containing foam plastic insulation shall also comply with the requirements of Section 2603.
MCM shall be labeled in accordance with Section 1703.5.

14B-14-1407 The provisions of Section 1407 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Amended Coun. J. 2-19-20, p. 14474.

The provisions of this section shall govern the materials, construction and quality of exterior insulation and finish systems (EIFS) for use as exterior wall coverings in addition to other applicable requirements of Chapters 7, 14, 16, 17 and 26.
EIFS shall be constructed such that it meets the performance characteristics required in ASTM E2568.
The underlying structural framing and substrate shall be designed and constructed to resist loads as required by Chapter 16.
EIFS shall comply with Section 1402 and shall be designed and constructed to resist wind and rain in accordance with this section and the manufacturer's application instructions.
EIFS without drainage (barrier-type) shall not be permitted. EIFS shall have an average minimum drainage efficiency of 90 percent when tested in accordance with the requirements of ASTM E2273. Details of the required drainage mechanisms shall be provided on the construction documents.
Installation of the EIFS shall be in accordance with the manufacturer's instructions.
EIFS installations shall comply with the provisions of Sections 1704.2 and 1705.16.

14B-14-1408 The provisions of Section 1408 of IBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

The provisions of this section shall govern the materials, construction and quality of High-Pressure Decorative Exterior-Grade Compact Laminates (HPL) for use as exterior wall coverings in addition to other applicable requirements of Chapters 14 and 16.
HPL used as exterior wall covering or as elements of balconies and similar projections and bay and oriel windows to provide cladding or weather resistance shall comply with Sections 1408.4 through 1408.14.
HPL used as architectural trim or embellishments shall comply with Sections 1408.7 through 1408.14.
HPL systems shall be designed and constructed to resist wind loads as required by Chapter 16 for components and cladding.
Results of tests or an engineering analysis shall be submitted to the building official with the construction documents to demonstrate compliance with the requirements of Chapter 16 for wind loads.
HPL systems shall comply with Section 1402 and shall be designed and constructed to resist wind and rain in accordance with this section and the manufacturer's instructions.
HPL systems shall be constructed of materials that maintain the performance characteristics required in Section 1408 for the duration of use.

Where HPL systems are used on exterior walls required to have a fire-resistance rating in accordance with Section 705, evidence shall be submitted to the building official that the required fire-resistance rating is maintained.

Exception: HPL systems not containing foam plastic insulation, which are installed on the outer surface of a fire-resistance-rated exterior wall in a manner such that the attachments do not penetrate through the entire exterior wall assembly, shall not be required to comply with this section.

Unless otherwise specified, HPL shall have a flame spread index of 75 or less and a smoke-developed index of 450 or less when tested in the minimum and maximum thicknesses intended for use in accordance with ASTM E84 or UL 723.
Where installed on buildings of Type I, II, III and IV construction, HPL systems shall comply with Sections 1408.10.1 through 1408.10.4, or Section 1408.11.
HPL shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 450 when tested in the minimum and maximum thicknesses intended for use in accordance with ASTM E84 or UL 723.
HPL shall be separated from the interior of a building by a thermal barrier consisting of 1/2-inch (12.7 mm) gypsum wallboard or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275.

The thermal barrier specified for HPL in Section 1408.10.2 is not required where:

  1. The HPL system has passed tests conducted in accordance with UL 1040 or UL 1715. Such testing shall be performed with the HPL in the minimum and maximum thicknesses intended for use. The HPL system shall include seams, joints and other typical details used in the installation and shall be tested in the manner intended for use.
  2. The HPL is used as elements of balconies and similar projections, architectural trim or embellishments.
The HPL system shall be tested in accordance with, and comply with, the acceptance criteria of NFPA 285. Such testing shall be performed on the HPL system with the HPL in the minimum and maximum thicknesses intended for use.
Where approved by the building official, HPL and HPL systems shall not be required to comply with Section 1408.10.4 provided that such systems comply with Section 1408.11.1.
HPL shall not be installed more than 40 feet (12 190 mm) in height above grade plane where installed in accordance with Sections 1408.11.1.1 and 1408.11.1.2.
Where the fire separation distance is 15 feet (4572 mm) or less, the area of HPL shall not exceed 10 percent of the exterior wall surface.

Where the fire separation distance is greater than 15 feet (4572 mm), the area of exterior wall surface coverage using HPL shall not be limited.

HPL shall be permitted to be installed on buildings of Type V construction.
HPL systems containing foam plastic insulation shall comply with the requirements of Section 2603.
HPL shall be labeled in accordance with Section 1703.5.

14B-14-1409 The provisions of Section 1409 of IBC are adopted by reference without modification.

Added Coun. J. 4-10-19, p. 100029.

Exterior deck boards, stair treads, handrails and guards constructed of plastic composites, including plastic lumber, shall comply with Section 2612.
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