Unless otherwise expressly stated, the following words and terms shall, for the purposes of this code, have the meanings indicated in this chapter




НазваниеUnless otherwise expressly stated, the following words and terms shall, for the purposes of this code, have the meanings indicated in this chapter
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R4402.7.8.6 The proposed method of attachment for tile systems which are not considered air permeable shall provide a minimum characteristic force (F') (listed in tile product control approval) to meet or exceed the required Uplift Resistance (F_r) as determined by following the procedures outlined in RAS 127.


R4402.7.8.7 Tile systems shall extend beyond the drip edge (not including the rake) not less than 3/4 inch (19 mm) but not more than 2 inches (51 mm).


R4402.7.8.8 Spanish "S" tile, Barrel tile or other tile systems that create a void between the deck and the underside of the tile shall be closed at the eaves with a prefabricated closure or mortar filler to close the eaves and elevate the butt ends of the first course, as detailed in the tile system product control approval.


R4402.7.8.9 Apply a minimum 3/8-inch (9.5 mm) diameter weep holes, spaced not more than 12 inches (305 mm) apart, located flush with the underlayment of all tile systems, except tile systems using thick-butt tile.


R4402.7.8.10 Mortar or adhesive set tiles applied at an incline from 4-1/2:12 up to and including 7:12 shall have the first course of tile (this applies to pan only on two-piece barrel tile) mechanically fastened with not less than one fastener per tile. As an alternate, the first course of tile shall be applied in mortar over a single layer of minimum 20 gage galvanized wire mesh with openings of not less than 1/2 inch (12.7 mm) or greater than 1-1/2 inches (38 mm) with minimum exposure of 12 inches (305 mm) which is mechanically attached to the deck through the underlayment with approved fasteners and tin-cap when back nailing the cap sheet. Additionally, for roof inclines of 6:12 up to and including 7:12, every third tile of every fifth course, shall be mechanically fastened with not less than one fastener per tile. For roof inclines above 7:12, in addition to the mortar or adhesive, all tiles shall be mechanically fastened with not less than one fastener per tile. Apply approved flashing cement to seal all tile fastener penetrations, for all roof inclines.


R4402.7.8.11 All tile systems shall be shingle lapped interlocking and installed with the headlap as specified in the tile system product control approval. In no case shall the minimum headlap be less than 2 inches (51 mm) for mortar or adhesive set tile, or less than 3 inches (76 mm) for mechanically set tile, unless restricted by product design.


R4402.7.8.12 Where tiles are to be installed over an insulated roof deck, a suitable nailable substrate, in accordance with R4402.9.5.6 and R4402.9.5.7 must be installed over the insulation prior to the installation of approved underlayment and tiles.

R4402.7.8.13 For mortar or adhesive set tile, no more than two tiles shall be loose per roofing square (100 sf) (9.3 m^2). No loose tile shall be adjacent to each other.


R4402.7.9 Metal panels/shingles. Steel panels/shingles shall be a minimum of G-90 corrosion resistant, and shall be not less than 26 gage in thickness. Aluminum panels/shingles shall not be less than 0.025-inch (0.685 mm) thick. All other metal panel/shingle products shall be an equivalent weight. All metal panel/shingle assemblies shall be capable of withstanding foot traffic without damage to the metal panels/shingles. Metal panels/shingles shall have product control approval for a complete metal system, which shall include the panel/shingle, underlayment and all related accessories to provide a complete waterproof system.


R4402.7.9.1 All metal panels/shingles assemblies shall be tested in accordance with R4402.12, and TAS 125.


R4402.7.9.2 The entire application method of all metal panel/shingle systems shall be detailed in the product control approval and RAS 133, as applicable.


R4402.7.9.3 Metal shingles may be applied as a recover over a single layer of asphaltic shingles or smooth surface roofing, providing the deck is solid sheathed and in compliance with the provisions of this code, the existing prepared roof covering is in compliance with provisions of this code and the entire metal shingle system is applied as set forth in the product control approval.


R4402.7.9.4 Metal panel/shingle systems shall not extend more than 1 inch (25 mm) beyond the roof eave.


R4402.7.9.5 All intersections shall be flashed in metal as provided in R4402.6.6, RAS 111 and the roof assembly Product Control Approval.


R4402.7.10 Wood shingles and shakes. All wood shingles and shakes shall be installed in accordance with RAS 130. Installation of all wood shingles and shakes shall be limited to a roof mean height of 33 feet (10 m), unless otherwise specifically noted in the product control approval.

R4402.7.10.1 All wood shingle/shake systems shall be tested in accordance with R4402.12.


R4402.8 HIGH VELOCITY HURRICANE ZONES - ROOF COVERINGS WITH SLOPES LESS THAN 2:12


R4402.8.1 General. All adhered roofing components shall be bonded to the various types of substrates in compliance with the requirements set forth in the roofing assembly product control approval and the following minimum requirements. The authority having jurisdiction may adopt RAS 150 as the means of complying with the requirements listed in this section.


R4402.8..2 All packaged asphalt shall have the following data printed on the carton wrapper:


R4402.8.2.1 ASTM designation and type;


R4402.8.2.2 Flash point as determined by ASTM D 92, Flash and Fire Point by Cleveland Open Cup; and


R4402.8.2.3 Equiviscous temperature (EVT) at which the asphalt attains a viscosity of 125 centipoise (25 centipoise for coal tar) as determined by ASTM D 4402, Viscosity Determinations of Unfilled Asphalt Using The Brookfield Thermoset Apparatus.


R4402.8.3 Asphalt types, as defined by ASTM D 312, shall be employed in all roofing assemblies. Application of asphalt shall be in compliance with Table R4402.8.3A and Table R4402.8.3B or as detailed in the roofing assembly product control approval.


TABLE R4402.8.3A

SLOPE AND APPLICATION TEMPERATURE CRITERIA


MAXIMUM{1}


TEMPERATURE

(ºF)

ASTM D312 SLOPE

TYPES OF ASPHALT (in./ft) MOP MECHANICAL


Type I Dead level 1/4 350 +/-25 375 +/-25


Type II Flat 1/2 400 +/-25 425 +/-25


Type III Steep 3 425 +/-25 450 +/-25


Type IV Special Steep N/A 450 +/-25 475 +/-25

(All roof

tile systems)


1 inch = 25.4 mm; ºC = 5/9 (ºF - 32)


1. Temperature and slope measurements are at point of application


TABLE R4402.8.3B

SLOPE AND APPLICATION TEMPERATURE CRITERIA


ASTM 450 COAL TAR MAXIMUM SLOPE TEMPERATURE RANGE

TYPE NO. TYPE OF COAL TAR (in./ft) (ºF)


Type I Coal Tar Pitch 1/4 360 +/-25


Type III Coal Tar Bitumen 1/4 375 +/-25


1 mm = 25.4 mm; ºC = 5/9 (ºF - 32)


R4402.8.4 Back nailing of inter-ply sheets shall not be required when using ASTM D 312 Type IV asphalt on slopes less than 3:12.


R4402.8.5 Mechanical attachment. All mechanically attached roofing components shall be attached to the various types of substrates in compliance with the requirements set forth in the roofing assembly product control approval and the following minimum requirements.


R4402.8.5.1 Base sheet attachment on wood decks: Nails shall be minimum 12 gage, annular ring shank nails having not less than 20 rings per inch; heads not less than 3/8-inch (9.5 mm) in diameter; and lengths sufficient to penetrate through the thickness of plywood panel or wood plank decking not less than 3/16 inch, or to penetrate into a 1-inch (25.4 mm), or greater, thickness of lumber not less than 1 inch (25.4 mm). Nails shall be hot dipped; electro or mechanically galvanized to a thickness sufficient to resist corrosion in compliance with Appendix "E" of TAS 114. All nails shall be Product Control Listed. All nail cartons or carton labels shall be labeled to note compliance with the corrosion resistance requirements. No roofing material shall be fully or partially adhered, unless otherwise noted in the roof assembly Product Control Approval directly to a nailable deck.


R4402.8.5.1.1 Such fasteners shall be applied through 'tin caps' not less than 1-5/8 inches (43 mm) and not more than 2 inches (11 mm) in diameter and of not less than 32 gage (0.010-inch) sheet metal. "Cap Nails" with integral heads shall not be an acceptable substitute. All tin caps shall be Product Control Listed.


R4402.8.1.2 Prefabricated fastener systems complying with R4402.8.5.1 and R4402.8.5.1.1 may be used, provided they are Product Control listed.


R4402.8.5.1.3 Spacing of such fasteners shall be in compliance with patterns set forth in the roofing assembly product control approval.


R4402.8.5.2 Where the architectural appearance of the underside is to be preserved, a base sheet may be secured in an alternate method of attachment prepared, signed, and sealed by a Florida-registered Architect or Engineer, or in buildings where the mean roof height does not exceed 15 feet (4.6 m), a base sheet may be secured with 1-1/4-inch (32 mm) fasteners on supporting members, with a minimum of 1/2-inch (12.7 mm) fasteners between the supporting members, all of which shall be secured through tin caps and nailed 6 inches o.c. in all directions.


R4402.8.5.3 Lightweight insulating concrete. All lightweight insulated concrete shall be vented per roofing system manufacturer recommendations.


R4402.8.5.3.1 Lightweight concrete shall not be applied over an existing roof deck unless the supporting structure has been approved as adequate to sustain the added weight. Calculations verifying the adequacy of the existing structure to sustain the added weight shall be prepared, signed, sealed and dated by a Florida-registered architect or engineer, which architect or engineer is proficient in structural design, and submitted with the Uniform Roofing Permit Application.


R4402.8.5.4 Other Nailable decks. The mechanical attachment of roofing components to other nailable decks shall be governed by the roofing assembly product control approval.


R4402.8.6 Cast-in-place and precast structural concrete decks. Cast-in-place and precast structural concrete decks are considered non-nailable. Concrete decks shall be clean, dry and fully primed with ASTM D 41 or ASTM D 43, as required, primer applied at a rate of not less than one gallon (3.8 L) per square. Hot asphalt or cold adhesive shall not be applied until the primer has fully dried.


R4402.8.6.1 In hot mopped applications over precast panels, a minimum of 12-inch (305 mm) wide strips of roofing felt or modified bitumen shall be applied to all panel joints. Said strips shall be bonded to the panel joints with asphalt, approved mastic or approved cold applied adhesive or shall be torched to a primed surface.


R4402.8.7 Steel decks. Steel decks shall be covered with a roof insulation panel having its own product control approval and listed in the roofing assembly product control approval. Insulation panels shall be mechanically fastened in compliance with the mechanical attachment patterns listed in the roofing assembly product control approval, and in accordance with the provisions of RAS 117.


R4402.8.7.1 If the deck thickness, on an existing steel deck, is less than 22 gage, a field fastener withdrawal resistance test shall be conducted, in compliance with TAS 105, to confirm compliance with the wind load requirements of Section 4403. Test results shall be submitted with the Uniform Roofing Permit Application for review prior to issuance of the roofing permit. The field fastener withdrawal resistance test shall be carried out by a Product Control Division certified testing laboratory.


R4402.8.7.2 Steel decks shall be welded or mechanically attached to the structure in compliance with the design pressure requirements set forth in Section 4403.


R4402.8.7.3 Composite wood and insulation panels shall be mechanically attached to steel decks in compliance with the attachment requirements enumerated in the insulation roofing component product control approval. The composite wood insulation panel shall be in compliance with the minimum sheathing requirements of this code.


R4402.8.8 Flashing. All flashing shall be installed according to the roof assembly manufacturer's published details and literature and in accordance with RAS 111.


R4402.8.9 Valleys. Valleys in BUR shall be installed in according to the roof assembly manufacturer's published literature for high wind areas and in compliance with the applicable detail described in the product control approval.


R4402.8.10 Parapet walls. All parapet wall details shall be installed in accordance with the roofing system Product Control Approval, manufacturer’s published details and literature and in accordance with approved methods detailed in RAS 111.


R4402.8.11 Insulation. Roof insulation shall be applied in compliance with the roofing system product control approval and RAS 117.


R4402.8.12 Surfacing. Roofing assemblies shall be surfaced in compliance with the product control approval. Surfacing shall be in sufficient quantity to comply with the required fire classification. Aggregate surfacing shall not be used on slopes greater than 3:12. Aggregate shall be embedded in a flood coat of bitumen applied over a prepared top ply.


R4402.8.12.1 On slopes of 3:12 or less, not less than 400 lb (182 kg) of roofing gravel or 300 lb (145 kg) of slag per square shall be applied. A minimum of 50 percent of the total aggregate shall be embedded in the flood coat of bitumen. Aggregate shall be dry and free from dirt and shall be in compliance with the sizing requirements set forth in ASTM D 1863. A building official may as an option, request a test to confirm compliance with these requirements.


R4402.8.12.2 On inclines greater than 3:12, a smooth surface coating shall be applied.


R4402.8.12.3 Mineral surfaced cap sheet applications shall not require any additional surfacing unless required with the particular assembly for a fire classification.


R4402.8.12.4 All smooth surface applications shall be coated with an aluminized or emulsion coating, having a valid and current product control approval and shall be in compliance with the application instructions in said product control approval. Coating quantity shall be in compliance with the required fire rating classification for the structure.


R4402.8.13 Attachment of metal termination. All edge metal and terminations shall be installed according to manufacturers published literature, provided it meets the minimum requirements as set for in RAS 111 and Section 4403.


R4402.8.14 Expansion joints. Expansion joint covers and expansion joint components shall be constructed and installed in accordance with the roofing assembly manufacturer's published literature


R4402.8.15 Venting roofing assemblies. All roof assemblies shall be applied to a dry substrate. Vapor retarders shall be installed, where applicable, to reduce moisture vapor flow into insulation from the warm, humid building interior, leading to internal condensation. Vents shall be installed to assist in the expulsion of moisture vapor where such vapor may enter the roofing assembly or moisture, as defined in R4402.11.12, has been left in an existing roofing assembly. Venting units shall not allow vapor to enter the roofing assembly when the high vapor pressure side is above the roofing membrane.


R4402.9 HIGH VELOCITY HURRICANE ZONES - ROOF INSULATION


R4402.9.1 General. All roof insulation shall have a product control approval as an approved roofing component for use in roofing assemblies. All insulation shall be tested for physical properties in accordance with TAS 110.


R4402.9.2 Foam Plastic. Foam plastic roof insulation shall conform to the material and insulation requirements of Chapter 26.


R4402.9.2.1 Foam insulation panels shall be overlaid with a perlite, fiberglass, wood fiber or mineral wool overlay unless specifically stated to the contrary in the roof assembly product control approval.


R4402.9.3 Cellulose fiberboard. Cellulosic fiberboard roof insulation requirements shall conform to the materials and insulation requirements of Chapter 23.


R4402.9.4 Insulation fasteners, membrane fasteners and stress plates: All Insulation fasteners, membrane fasteners and stress plates shall have a roof component product control approval, and shall be tested in compliance with RAS 117 Appendixes A, B and C, and TAS 110 and TAS 114, Appendix E, Section 3 (DIN 50018), for corrosion resistance.

R4402.9.5 Application. Roof insulation shall be applied in strict compliance with the application methods detailed in the roof assembly product control approval and with the requirements set forth in RAS 117.


R4402.9.5.1 Roof insulation, either on the ground or on the roof top, shall be kept dry. The building official shall instruct the removal of the insulation from the job when elevated moisture levels are found in the insulation or where panels cannot achieve 85% adhesion.


R4402.9.5.2 When applied in hot asphalt or cold adhesive, no insulation panel's dimension shall be greater than 4 feet (1219 mm).


R4402.9.5.3 Strip or spot mopping of insulation panels shall be used as an application method only when approved in the roof assembly product control approval.


R4402.9.5.4 Where more than one layer of insulation is applied, joints between layers shall be staggered.


R4402.9.5.5 Application in approved cold adhesive shall be as detailed in the product control approval and shall be in compliance with the required fire classification.


R4402.9.5.6 Nail boards or composite panels with a nailable surface may be applied to sloped decks for the application of prepared roof covering or metal roofing systems, providing that the nailing surface is minimum 15/32-inch (12 mm) exterior grade plywood sheathing, and has been attached to the deck with approved fastening assemblies in accordance with the windload requirements of Section 4403. Composite panels shall be gapped a minimum of 1/8 inch (3.2 mm) to allow for expansion of the sheathing panel.


R4402.9.5.7 Suitable nailable decks installed over rigid board roof insulation in buildings of mean roof height of 35 ft (10.7 m) or less, shall be a minimum of 15/32-inch (12 mm) exterior grade plywood sheathing. These decks shall be fastened to every structural roof frame member or to the existing deck under the insulation, at intervals of not more than 24 inches (610 mm) apart, with a minimum #12 approved insulation fastener spaced at a maximum of 12 inches (305 mm) apart in one direction with a minimum penetration of 1-1/2 inches (38 mm) into the structural member or deck. In these cases the maximum thickness of the rigid insulation board shall not exceed 2 inches (51 mm). An alternate method of attachment may be proposed, provided it is in compliance with Section 4403, and it is prepared, signed and sealed by a Florida-registered Architect or a Florida Professional Engineer, which architect or engineer shall be proficient in structural design.


R4402.9.5.8 Mechanical attachment of insulation panels at uneven areas shall be acceptable. Hollowing, cutting or scoring of insulation panels to provide contact shall not be acceptable.


R4402.10 HIGH VELOCITY HURRICANE ZONES REROOFING


R4402.10.1 General. Materials and methods of application used for recovering or replacing an existing roof covering, system or assembly shall comply with the requirements set forth inR4402.1 through R4402.14.


R4402.10.2 Repairs shall be carried out with roofing components as defined in this chapter having product control approval.


R4402.10.3 Repairs shall be carried out in such a manner as to not to create additional ponding water.


R4402.10.4 Not more than 25% of the total roof area or roof section of any existing building or structure shall be repaired, replaced or recovered in any 12 month period unless the entire existing roofing system or roof section is replaced to conform to requirements of this code.


R4402.10.5 A roofing system shall not be applied over an existing roof or over an existing roof deck where the roof sheathing has not been fastened in compliance with this code or where the roof sheathing will not permit effective fastening or where sheathing is water soaked or deteriorated so that effective attachment is not possible. All areas of deteriorated sheathing shall be removed and replaced. The building official shall not be required to inspect the renailing of the sheathing under this section.


R4402.10.6 Structural concrete decks shall be allowed to dry or shall be dried prior to application of an ASTM D 41 or ASTM D 43, as required, or roofing system proprietary primer where the base sheet or base insulation layer is bonded to the concrete deck.


R4402.10.7 On lightweight concrete, gypsum and cementitious wood fiber roof decks a field fastener withdrawal resistance test, in compliance with TAS 105, shall be carried out to confirm compliance with wind load requirements of Section 4403.


R4402.10.7.1 If the tested fasteners exhibit a minimum characteristic resistance force less than 80% than that listed in the NOA, a structural engineer shall examine the deck's integrity and provide a proposed attachment specification. Such specification shall be submitted with the Uniform Roofing Permit Application for review and approval by the building official prior to the issuance of a roofing permit. Calculations for the attachment of the anchor sheet/base sheet or insulation over these deck types, shall be in compliance with RAS 117.


R4402.10.8 Steel decks shall be examined prior to recover for indication of corrosion. Any corrosion shall be treated with a rust inhibitor, providing the field fastener withdrawal resistance values of the proposed mechanical fasteners comply with the requirements of Section 4403 of this code. All steel decks less than 22 gage shall be field tested for fastener withdrawal resistance for compliance with Section 4403 prior to application of a new roofing system. Test results shall be submitted with the Uniform Roofing Permit Application.


R4402.10.9 One additional roofing system may be applied over an original roofing assembly, providing the existing roofing assembly complies with the requirements of R4402.10.


R4402.10.10 If the recover roofing assembly is to be bonded to an existing roofing membrane, the existing roofing membrane shall be tested in compliance with TAS 124 for uplift resistance. The existing roofing membrane shall resist the design pressures calculated under section 4403 of this code. Test results shall be submitted with the Uniform Roofing Permit Application.


R4402.10.11 If the recover roofing assembly is mechanically attached through either a base sheet or insulation layer, the attachment assembly shall be field tested for fastener withdrawal resistance, in compliance with TAS 105, and laboratory tested for pull-over resistance to insure compliance with wind uplift requirements set forth in Section 4403 of this code. Test results shall be submitted with the Uniform Roofing Permit Application.


R4402.10.12 Moisture content of the existing roofing assembly to be covered by a new roofing system shall not exceed 5% by weight in the roofing membrane and 8% by weight in the insulation system, as verified by moisture survey performed in accordance with TAS 126. Test results shall be submitted with the Uniform Roofing Permit Application.


R4402.10.13 Prior to starting the work the contractor has the responsibility of notifying the owner, by means of the roofing permit and REQUIRED OWNERS NOTIFICATION FOR ROOFING CONSIDERATIONS herein, of any possibility of ponding water and recommend a structural review if ponding water is a possibility.


R4402.10.14 If the new roofing system is to be bonded to the existing roof surface, the surface shall be free of all loose gravel, dirt and silt and dry prior to commencement of the roofing application. All blisters shall be cut and repaired prior to roofing application.


R4402.10.14.1 If the existing roof surface has gravel embedded in hot asphalt, all loose gravel shall be removed together with any dirt and silt. The dry membrane surface shall be primed with ASTM D 41 primer or proprietary roofing system primer and allowed to dry thoroughly. A flood coat of ASTM D 312, type III or IV asphalt shall be applied to sufficient depth to cover the remaining embedded gravel. The prepared substrate shall be suitable for application of a new insulation layer only.


R4402.10.14.2 In the case of existing coal tar assemblies, the existing roof surface shall be primed with ASTM D 43 primer or covered with a mechanically attached separation board prior to application of a new coal tar assembly. If an existing coal tar assembly is to be covered with an asphalt applied roofing system, only the separation board is acceptable. The attachment of the entire assembly, including the separation board, shall meet the design pressure requirements set forth in Section 4403.


R4402.10.14.3 Insulation shall have product control approval as a roofing component approved for use as a part of the roofing assembly. The insulation panels shall be bonded or mechanically attached in compliance with the product control approval and RAS 117.


R4402.10.15 Where an existing sloped roof is sheathed with spaced sheathing, any existing prepared roof covering shall be removed. New sheathing shall be applied in compliance with Section 4403, or open spacing shall be filled with dimensional lumber to create solid wood sheathing providing the spaced sheathing is in compliance with this code. Spaced sheathing is approved for use with wood shakes and wood shingles only.


R4402.10.16 No recover application shall take place over existing wood shingles, shakes, slate, tile or metal shingles.


R4402.10.17 Asphaltic shingle assemblies may be applied over one existing layer of asphaltic shingles having not more than 1/8-inch (3.2 mm) difference in level in the existing shingle material. Recover over an existing shingle system shall be with a product having product control approval as prepared roof covering, in strict compliance with the application method detailed in the product control approval.


R4402.10.18 Sprayed polyurethane foam (PUF) and elastomeric coating systems may be applied over existing roofing assemblies providing the PUF system has obtained product control approval, the deck has been prepared in compliance with the product control approval and this code, the application is in strict compliance with the foam manufacturer's published application instructions for the environmental conditions at the time of application and post-application inspections conform to RAS 109.


R4402.10.18.1 No sprayed polyurethane foam (PUF) and/or elastomeric coating systems shall be applied over existing composition shingles.


R4402.10.18.2 Upon completion of a PUF system, an inspection of the system shall be carried out by an authorized representative of the coating manufacturer. A certification shall be furnished to the building official within 30 days of completion, confirming that the quality control tests detailed in the PUF system product control approval have been carried out with satisfactory results.


R4402.10.18.3 Should a PUF system have inadequate adhesion to meet the design pressures, as set forth in Section 4403, the roofing system shall be removed and replaced with a roofing system tested to adequate adhesion. An additional inspection shall be required once the roofing system has been replaced. A field adhesion test may be requested by the building official during the application or at the completion of the project to confirm adequate adhesion.


R4402.10.18.4 The PUF system shall comply with R4402.10.


R4402.10.18.5 All PUF systems shall be installed by licensed roofing contractors holding an applicator's certificate from the manufacturer holding the product control approval for the PUF system.


R4402.10.19 Roof coverings or roofing components, such as tile, slate or similar, shall not be applied over an existing roofing system.


R4402.10.20 Lightweight insulated concrete shall not be applied over an existing roofing system unless the existing roofing assembly is verified to be adequate to accept the new lightweight insulating concrete and is in compliance with the testing required herein.


R4402.10.21 Existing ventilation. Ridge ventilation is recommended whenever possible to create airflow entering the soffit and exiting the ridge. Ridge ventilation shall not be installed without adequate soffit ventilation to draw outside air through the ridge void. When recovering, repairing or reroofing, the existing amount of attic ventilation shall not be reduced.


R4402.11 HIGH VELOCITY HURRICANE ZONES - ROOFTOP STRUCTURES AND COMPONENTS


R4402.11.1 Rooftop Structures. Rooftop structures shall be designed and constructed in accordance with the Florida Building Code.


R4402.11.2 Rooftop mounted equipment. All rooftop equipment and supports shall be secured to the structure in compliance with the loading requirements of Section 4403. The use of Wood 'sleepers' shall not be permitted.


R4402.11.3 Machinery, piping, conduit, ductwork, signs and similar equipment may be mounted on roofs in compliance with the following:


R4402.11.3.1 Permanently mounted rooftop equipment shall be installed to provide clearances, in accordance with Table R4402.11.3, to permit repairs, replacement and/or maintenance of the roofing system or any of its components.


TABLE R4402.11.3

ROOF MOUNTED EQUIPMENT HEIGHT REQUIREMENTS


WIDTH OF EQUIPMENT HEIGHT OF LEGS

(in.) (in.)


Up to 24 14


25 to 36 18


37 to 48 24


49 to 60 30


61 and wider 48


R4402.11.3.2 When re-roofing, recovering, performing repair or roof maintenance, and where the roof top equipment is moved to properly execute such work, the minimum clearances of the said equipment support shall be in accordance with Table R4402.11.3.


R4402.11.3.3 In buildings where the existing rooftop equipment, in the opinion of the building official, provides sufficient clearance to repair, recover, replace and/or maintain the roofing system or any of its components, such existing equipment need not comply with Table R4402.11.3.


R4402.11.3.4 Electrical conduit, mechanical piping or any other service lines running on the roof shall be raised not less than 8 inches (203 mm) above the finished roof surface.


R4402.11.3.5 Condensate lines shall not drain on the roofing system or any of its components. Condensate lines need not comply with the minimum clearance requirements.

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