DIVISION 7 - THERMAL AND MOISTURE PROTECTION

Transcription

1 DIVISION 7 - THERMAL AND MOISTURE PROTECTION This division contains the following elements: 1.1 Waterproofing and Vapor Retarders. A. Fluid Applied Waterproofing. B. Vapor Radon Retarders. 1.2 Insulation. 1.3 Roofing. A. General. B. Steep Slope Roofs. C. Low Slope Roofs. D. Base Flashing. E. Parapets and Adjoining Walls. F. Roof Venting. G. Re-Roofing. H. Steel Roof Blocking (SRB) and Sheet Metal Flashing. I. Roof Expansion Joints. J. Gutters and Downspouts. 1.4 Roof Hatches and Skylights. 1.5 Fireproofing and Firestopping. 1.6 Joint Sealants. 1.1 WATERPROOFING AND VAPOR RETARDERS A. Fluid Applied Waterproofing. 1. Provide waterproofing protection at floors and walls below grade level to prevent water infiltration into the building interior caused by hydrostatic pressure or other water conditions. 2. Provide waterproofing at the inside face of retaining walls, planter walls and planter floors where the outside face is exposed or part of a finished wall or ceiling assembly. 3. One component moisture curing or two component urethane type waterproofing are suitable for covered, non-traffic, below grade locations. 4. Concrete eyebrows, overhangs, covered areas and walkways shall be roofed in accordance with the requirements stated in this Division. Fluid applied waterproofing systems shall not be used in these areas unless prior written approval is granted from M-DCPS Maintenance & Operations Roofing Division. B. Vapor Radon Retarders: 1. Comply with FBC-Florida Standard for Radon-Resistant New Commercial Building Construction and EPA Handbook for Sub-Slab Depressurization for Low Permeability Fill Material, both obtained from Department of Health Bureau of Environmental Toxicology, Radon and Indoor Air. 2. Specify a puncture resistance single-layer extruded polyolefin membrane, minimum 15 mils thick and maximum of perms, to provide a continuous barrier between compacted fill and the building s ground floor slab. Indicate on the construction drawings details of perimeter, penetrations, and joint conditions. Lap edges a minimum of 6 inches and seal with self-adhering joint tape. Ten mil polyolefin sheets and tape may be used at exterior slabs. April, 2017 Thermal and Moisture Protection 7-1

2 1.2 INSULATION A. Select the appropriate insulation system to comply with FBC and M-DCPS Maintenance & Operations - Roofing Division requirements. B. Design the thermal insulation system to fully protect the building s envelope. C. Specify insulation installation meeting MDCPS Division of Roofing requirements and FPL s roofing insulation rebate program, if available. D. Acceptable thermal wall insulation materials include: 1. According to the Florida Building Code (FBC), foam plastic insulation requires separation from the building interior by a thermal barrier of 1/2" gypsum wallboard or accepted equivalent. Lay-in ceilings do not qualify as an accepted thermal barrier. 2. Foil-faced fiber, fiberglass blanket or batt insulation between wall furring. 3. Other insulation materials or methods at locations where blanket or board insulation cannot be used, as accepted by MDCPS on per condition basis. E. Foamed-in-place insulation, in-cell Styrofoam inserts, and loose fill insulation in CMU walls are not allowed. F. Accepted roofing insulation materials include: 1. Lightweight insulating concrete over embedded styrene boards with minimum R-19 insulating value and 300 psi minimum compressive strength. 2. Rigid-board roof insulation alone is not allowed on new construction or re-roofing applications without prior written approval from M-DCPS Maintenance & Operations Roofing Division. For these cases, comply with the following: a. Rigid-board roof insulation shall be calculated as having a uniform minimum thickness, not an average thickness, and achieve a minimum R-value of 19 with R = 5.6 per inch. Additional tapered insulation to achieve slope shall not be included in this calculation. b. An overlayment or cover shall be used in addition to the HCFC isocyanurate foam board specified in this Division. The overlayment or cover board shall be either a glass faced gypsum roof board with integral surface treatment (Dens-Deck) or asphalt-impregnated glass fiber board (Sopraboard) as approved by the roof system manufacturer. No substitutions are allowed. Particleboard, wood fiber, perlite or wood composite boards shall not be used in a roofing assembly. 3. The perimeter of the lightweight insulating concrete on the roof insulation system, shall be encapsulated in 16-gauge galvanized Steel Roof Blocking (SRB) system that is properly secured to the structural deck to prevent uplift. G. Ceiling Insulation - Do not place thermal blankets insulation directly above suspended acoustical ceilings with recessed lighting fixtures or within 3 inches of the recessed lighting fixture enclosures, wiring compartments, or ballasts unless those fixtures are identified for such contact with insulation. 1.3 ROOFING A. General April, 2017 Thermal and Moisture Protection 7-2

3 1. Prior to submitting the Plans and Specifications to the Building Code Compliance (BCC) Office for permit approval, and prior to bidding or Contract negotiation, the Contract roofing specifications section and detail drawings shall be submitted for review and approval to M-DCPS Maintenance & Operations Roofing Division. 2. Roofing related shop drawings and product submittals from the Contractor shall be submitted for review and approval by M-DCPS Maintenance & Operations Roofing Division, prior to acceptance by the A/E. 3. Concerns of M-DCPS for recycling and other environmental matters apply to roofing systems and their manufacturing process. 4. Metal roofs are not allowed except for prefabricated metal walkway covers, under Division The A/E shall select a roofing system from the options listed in this Division. The A/E has the sole responsibility of designing and specifying roofing system best suited for the project, taking into account the following: a. M-DCPS Maintenance & Operations - Roofing Division requirements. b. Life cycle costs. c. Hurricane and puncture resistant. d. Resistance to vandalism and maintenance traffic. e. Maintenance. f. Warranty. g. Safety of occupants. h. Longevity. i. Reflectivity for energy conservation. j. Aesthetics. k. Compatibility with adjacent existing roofs. l. Weight of existing roof and condition of existing structure. m. Cost. 6. Roofing system and roofing components design shall comply with: a. FBC ASCE-7, FBC Roofing Application Standards (RAS), and FBC Test Application Standards (TAS). b. M-DCPS Maintenance & Operations - Roofing Division latest procedures, practices and System Guidelines Details. c. Missile impact requirements of SSTD d. Miami-Dade County Product Control or State of Florida Product Approval. e. Underwriters Laboratories UL-790 and ASTME-108 requirements for Class A fire rating for roof coverings. f. Factory Mutual requirements for Class I rated assembly and FM uplift classifications as determined by FBC ASCE-7. g. Energy Star roofing systems that comply with M-DCPS Master Specifications Guidelines and Design Criteria shall be evaluated by the A/E and presented to M- DCPS Division of Facilities Design and Standards for considerations and possible approval. 7. Specify job safety standards according to FBC, M-DCPS Safety, Environment, and Hazards Management, and OSHA, including 29 CFR Submit to the Building Code Consultant (BCC) calculations, signed and sealed by a Florida registered professional engineer, establishing wind velocity pressure values in accordance to FBC ASCE-7. Indicate on the construction drawings wind pressure tables applicable to the project. April, 2017 Thermal and Moisture Protection 7-3

4 9. Roof assembly edge guards shall be provided at rooftop equipment that is closer than 10 feet from the edge of the roof. Whenever possible the roof top equipment should be placed more than 10 feet from the edge of the roof so as to leave room for the FBC required edge guards. The edge guards must be engineered by the A/E of record, and shall be firmly anchored to the structure, and flashed. The edge guards should be anchored to the structure at the building fascia in lieu of anchoring through the roof membrane whenever possible. 10. Limit roofing materials to one roofing system at each facility. The use of more than one roofing system at a Facility, requires prior written approval from M-DCPS Maintenance & Operations Roofing Division, on a per condition basis. 11. Different roofing systems shall be separated by a parapet, change of elevations, or any other means of termination to define warranty/liability limits and maintenance responsibilities. 12. Install access ladders at roof-to-roof transitions exceeding 24 inches in height. 13. All roof penetrations (i.e., soil stacks, electrical conduits, mechanical equipment curbs and supports, roof hatches, etc) shall be located no less than 24 inches away from other penetrations, parapet walls, roof edges, and roof equipment curbs, etc. 14. Provide proper disposal of rainwater from roofs by scuppers, collector heads, gutters, rain leaders and downspouts complying with FBC - Plumbing requirements. 15. Ponding, for any period of time on any roof surface, is not allowed. 16. Products containing asbestos are not allowed. 17. Design and locate traffic pads or a surface sacrificial layer at all ladder landings, at the work sides of all roof-mounted equipment that may require maintenance or repair, roof and access doors, and on three sides of roof hatches. Specify a fully adhered non-skid surface of a suitable color different from that of the roof deck that is acceptable to M- DCPS Maintenance & Operations - Roofing Division. 18. See Division 5 and FBC Roof Assemblies and Rooftop Structures for equipment framing support requirements. 19. The construction drawings shall indicate complete flashing details covering all conditions were base flashing, counterflashing, expansion joint assemblies and/or copings occur, including, but not limited to, the structure of the parapets and intersecting walls, exterior finishes on both sides of the parapets and intersecting walls, the roof deck structure, the roofing membrane and roof insulation, cants, base flashings, counterflashings, copings, drainage assemblies (scuppers, overflow scuppers, gutters, collector heads, downspouts, drip edges), equipment supports and curbs, and all other components occurring in the details; all materials, components, assemblies and fabrications shall be called out, and the sizes and thickness of all materials and components shall be identified. B. Steep Sloped Roofs. 1. Use the following systems of roofs for slopes of 3-1/2:12 and greater: a. Barrel, flat, or Spanish S clay tile for historical buildings when accepted by M- DCPS Facilities Design and Standards on a per condition basis. b. Asphalt architectural dimensional-type 40-year or greater shingles, warranted for a 130-mph wind speed. At partial re-roofing projects, match existing conditions. 2. Minimum slopes shall comply with FBC - Building, Table Construction drawings for projects utilizing cement tile, clay tile or asphalt shingle roofs shall include complete details for the roofing installation and related conditions, April, 2017 Thermal and Moisture Protection 7-4

5 including, but not limited to, identification of the underlayment, flashings and drip edges (noting the materials used, their thickness, and methods of attachment to the building structure), and details at ridges, rakes, eaves, fascias and intersecting walls. C. Low Sloped Roofs. 1. Low slope roofs shall not exceed a slope of 2-1/2: Low slope roof design shall include a styrene butadiene styrene (SBS) modified bitumen roofing system with a 20-year no dollar limit manufacturer warranted. 3. Membrane lap seams shall be positioned to shed water. 4. Design the roof deck with 1/4" per foot slope. The use of higher sloping roofs requires prior written approval from M-DCPS Maintenance & Operations Roofing Division on a per condition basis. 5. Verify conformance to Class A fire rating for the proposed slope and comply with FBC - Building Tables A and B. 6. New construction: Styrene butadiene styrene (SBS) roof slopes, including crickets, shall be at least 1/4" per foot. 7. Re-roofing: SBS roof slopes shall be at least 1/8" per foot to existing drains or scuppers, with a minimum 1/4" per foot slope at crickets. Any ponding shall be eliminated in accordance with FBC - Building, High Velocity Hurricane Zones - Re-roofing. 8. Membranes with rubber composition or applied with hot asphalt are not accepted by M- DCPS. 9. Base sheets are required at lightweight concrete roof decks and other nailable substrates. Specify a mechanically attached impermeable polyester or polyesterfiberglass hybrid reinforced base sheet. 10. At granular mineral cap sheets, provide matching granules to cover exposed bitumen. D. Single Ply Roof Systems: 1. A single-ply roofing system shall only be used with prior written approval from M- DCPS Maintenance & Operations Roofing Division, and only on a per project basis. Single-ply roofing systems shall not be used in areas exposed to vandalism, heavy traffic or corrosive atmosphere. 2. Single-ply roofing systems shall be separated from SBS roofing systems with an area divider curb, expansion joint or other M-DCPS approved method, to define warranty/liability and maintenance responsibilities. E. Base Flashing: 1. All base flashings at parapets, walls, roof curbs and expansion joints shall be a 2-ply polyester or polyester/hybrid reinforced membrane with a minimum 8 inch vertical height above the finished roof surface. 2. Provide SRB metal cants at all base flashings locations. F. Parapets and Adjoining Walls: 1. For parapets or adjoining walls 60 inches or less in height a. Provide a termination bar along the top edge of the base flashing and wrap the remaining vertical stucco or pre-cast surface, including the top of the parapet or adjoining wall, with a reinforced one-ply granular surfaced polyester or polyester/glass hybrid, torch grade flashing membrane, placed over a primed substrate, ensuring proper overlap of the base flashing term bar. 2. For parapets or adjoining walls greater than 60 inches in height: April, 2017 Thermal and Moisture Protection 7-5

6 a. Provide a counter flashing at the top edge of the base flashing and the remaining vertical stucco or pre-cast surface above the counter flashing shall be waterproofed in accordance with the requirements noted in this Division. 3. The top of all parapet walls shall be covered by a stainless steel coping cap. a. Metal copings shall be secured by SRB hold-down cleats and be face fastened at inward facing parapet components with removable grommet type fasteners. 4. Slope the top of parapets, metal blocking, cleat, and coping caps 1 inch per foot down toward the wall s interior face. 5. At pre-cast (tilt-up wall construction) parapets: a. Tilt-up wall panel joints shall not have decorative reveals on the roof side of the wall within 2 inches above the counterflashing. Specify that all joint sealants shall be in place before parapet wall flashing or waterproofing/felt are installed. b. The tilt-up wall expansion joint sealant shall be extended all the way down to the roof deck on the roofing side of parapets. c. Provide sloped SRB blocking cleat and stainless steel coping across panel joints, allowing for expansion/contraction at the panel joints. d. Roofing sealants shall be compatible with the tilt-up wall expansion joint sealant. 6. Use the roofing systems manufacturer s published recommended primer at wall areas receiving bitumen type felts. 7. Seal built-up roofing flashing with cold bitumen and roofing tape, according to roofing manufacturer s requirements. 8. Indicate termination bars at the upper felt flashing terminal (horizontal) edge according to RAS 111. Do not omit termination bars due to metal counterflashing installation. G. Roof Venting 1. Mopped down or torched roof systems, or any other system using asphalt as an adhesive, over concrete roof decks shall be designed with a means to provide proper venting to eliminate blistering. a. No finished roof system shall be mopped or torched directly to a concrete deck substrate. Indicate a layer of insulation, such as lightweight insulating concrete, to receive the roofing base sheet on such roof decks. b. A concrete primer and vented base ply or insulation over interior or exterior spaces shall be included following the manufacturer s FM Uplift classifications as determined by FBC ASCE-7. c. Lightweight insulating concrete roof decks and fills shall receive an impermeable base sheet, mechanically anchored to the lightweight insulating concrete with the manufacturer s recommended roofing fasteners. 2. Provide metal roof vents over lightweight insulating concrete roof substrate on roofs located over gymnasiums and/or auditoriums. At all other areas, provide metal roof vents in roofing over lightweight insulating concrete roof decks and fills only if required by FBC or by roofing system manufacturer for its issuance of the 20-year warranty or for the roofing system s NOA (Notice of Acceptance) from the Miami- Dade County Building Department or another agency with the authority to approve decking/roofing systems. H. Re-Roofing. 1. Comply with FBC - Building, High Velocity Hurricane Zones Re-roofing edition designated for the project. April, 2017 Thermal and Moisture Protection 7-6

7 2. For re-roofing projects, the A/E will receive a work order from M-DCPS for the testing/re-roofing of a specific facility and may also receive related re-roofing information. 3. A/E shall identify defective portions of roof decks to be replaced before re-roofing. 4. A/E shall submit a re-roofing data sheet to M-DCPS Maintenance and Operations - Roofing Division before selecting the re-roofing system; the data sheet shall include the following: a. Roof s condition. b. Comments on the failure of the existing roof system. c. Age of roof. d. Verification of working and non-working exhaust vents and other mechanical equipment. e. Type of existing structural deck. f. Visual verification of the roof slope/drainage. g. Type of expansion joints. h. Extent of re-roofing work needed. i. Existing cracking of the roof deck and/or structure and subsurface conditions noted. j. Existing cracking or leaks in the parapet walls and corresponding parapet repair added to scope of work. 5. The A/E shall schedule an on-site pre-design conference with M-DCPS Maintenance & Operations - Roofing Division representatives and the school s principal to review the project data sheet and recommendations. The A/E shall record discussions and agreements and transmit the minutes of the conference to the M-DCPS representatives. 6. The A/E shall request from M-DCPS and schedule necessary test including, but not limited to, the following: a. Existence of asbestos roofing materials. b. Number of existing roof systems. c. Existence of insulation, the value of its thermal performance, and its moisture content. d. Type of existing roofing system and flashings. e. Type of the existing structure to verify its structural capacity, and if it is capable of supporting the proposed new roofing system. 7. After receiving satisfactory test results and if an overlay system is recommended by the A/E, an uplift test and applicable fastener pull out test are necessary to verify compliance with the uplift requirements for the basic wind speed for the project location per the FBC. 8. Specify the insulation installation so as to meet the FPL roofing insulation rebate program and M-DCPS re-roofing projects requirements. 9. On re-roofing projects, when a total roofing system removal is required, specify an adequate temporary seal to ensure weather tightness during re-roofing operations. I. Steel Roof Blocking (SRB) and Sheet Metal Flashing. 1. All SRB shall be galvanized steel and shall be provided with secured anchorage. 2. Wood blocking is not allowed. 3. All exposed metals used for the roofing and flashing systems shall be stainless steel, except roof drains flashing which shall be malleable copper. Use of lead flashing is not allowed. April, 2017 Thermal and Moisture Protection 7-7

8 4. Use SBC Industries flashings for all roof penetrations. 5. Neither pitch pans nor Chem-curbs are allowed 6. All fasteners used shall be removable exposed fasteners shall have grommetted washers. 7. Comply with RAS 111 and FBC Building, High Velocity Hurricane Zones-Weather Protection and Materials. 8. Sheet metal flashing for new and existing roofs shall comply with FM1-49 Loss Prevention Data Perimeter Flashing. 9. Sheet metal flashing shall comply with SMACNA, latest standards: a. New and re-roofing installations: Type 302 or gauge stainless steel. b. Historical buildings: Type 302 or gauge stainless steel or metal to match existing as accepted by M-DCPS, on a per condition basis. 10. Equipment curbs shall be prefabricated and installed on the structural deck so as to achieve the minimum height above the finished roof surface required by FBC, but no less than 14 inches above finish roof surface. Equipment curbs shall be anchored to the roof deck and/or building structure as necessary to resist hurricane wind forces in accordance with FBC - Building. The construction drawings shall indicate details with complete information covering the anchorage of the curbs and base flashing and counterflashing around the curbs. 11. All roof penetrations shall extend a minimum of 14 inches above the finished roof membrane, except 18 inches for mechanical supports. 12. Penetrations through the roof shall be kept to a minimum. Wherever possible, lightning protection penetrations shall be placed on the wall above the base flashing and not in the field of the roof. 13. All curbs shall have a minimum 1/2 inch per foot cricket on the upside slope of the curb. 14. Ensure that equipment (pipes, curbs, stands, roof jacks, lightning protection penetrations, hatches) maintain a minimum 24 inch distance from walls and other penetrations. J. Roof Expansion Joints. 1. Comply with FBC - Building, High Velocity Hurricane Zones - Roof Coverings with Slopes less than 2: Indicate expansion joints to allow for expansion and contraction to minimize cracking and deterioration of building component materials. The construction drawings shall indicate complete details for all roofing expansion joint assembly conditions provided in the project, which shall include, without being limited to, identification of all joint and roofing systems components and the structural roof deck, walls, parapets and other elements that occur at the locations of the details. 3. Roof expansion joints shall be compatible to the roofing manufacturer s specifications and recommendations. 4. Roof expansion joints shall be high profile, and insulated, with a minimum 16-gauge galvanized steel body and a minimum 26-gauge stainless steel cap. Expansion joints shall extend a minimum of 16 inches above the finish roof membrane. Wood nailers or exposed neoprene sheets are not allowed. K. Gutters and Downspouts. April, 2017 Thermal and Moisture Protection 7-8

9 1. Comply with RAS 111 and FBC - Building, High Velocity Hurricane Zones Weather Protection. 2. Interior roof drains, built-in gutters behind parapets, or parapet top gutters are not allowed. 3. Provide gutters and downspouts at edge of roof perimeters. 4. Gutters shall have rollover straps, 18-gauge minimum stainless steel, installed at a maximum of 30 inches on-center. All joints shall be soldered liquid gutter seal is not allowed. 5. The construction drawings shall contain complete details for all drip edges, scuppers, overflow scuppers, collector heads, gutters and downspouts, covering all parapet and roof edge conditions in the project, including, but not limited to, the sizes and sheet metal (stainless steel) gauges for all items, and their method of attachment to the building structure. 6. Specify the provision of a sheet metal sleeve to fill in an oversize scupper opening. Picture frame the inside and outside of all scuppers (working and overflow) and install sealant throughout prior to installing the collector head. 7. At tilt-up wall construction, scuppers and downspouts shall be offset a minimum of 12 inches from any tilt-wall panel joint. 8. Gutters, scuppers, and conductor heads shall be stainless steel. 9. Downspouts from conductor-head to 9 feet above finish grade shall be stainless steel. Downspouts from finish grade up to 9 feet above finish grade shall be Schedule 80 PVC. Provide a watertight connection at all stainless steel to PVC transition points. 10. Downspouts shall be connected to a storm drainage system and shall contain a clean-out at 18" above grade level. Collector heads shall include overflow provisions - a portion at the top of the collector head shall be lower than the top of the scupper draining into it, or an overflow relief opening shall be provided in the collector head near its top, so that water draining off of the roof would spill off of or out of the collector head, and not be able to back up onto the scupper and roof surface under instances of very heavy rain. 11. Downspouts discharging on grade require approval from M-DCPS Facilities Design and Standards on a per condition basis. When grade discharge is approved by M-DCPS, provide a poured in place concrete pads, not a pre-cast splash block, at downspout s discharge; the concrete pad must be indicated sloping away from the building. 12. At roof-to-roof transitions exceeding 24 inches in height, install gutters and downspouts. At discharge point provide an elbow and a polyester or polyester/glass hybrid reinforced, granular surface salvage sheet or traffic pad of a different color than the field of roofing cap sheet and adhered to roof membrane as recommended by the warranted roofing system manufacturer. 13. Paint PVC section of downspouts together with the fastening straps to match adjacent wall color. 14. Solder lap joints. Sealant at joints is not allowed. Provide expansion joints for thermal expansion and contraction. 15. Provide strap reinforcement with hemmed edges and no sharp edges. 16. Comply with SMACNA Architectural Sheet Metal Manual, latest edition, on material selection, fabrication and installation all sheet metal work 17. Sheet metal (stainless steel) diverters may be provided in retrofit projects over exterior door and window openings that do not have overhead roof protection, in order to correct reported water intrusion deficiencies through such openings. The top of such diverters shall have a bent-out flange that shall contain a bead of sealant that shall be April, 2017 Thermal and Moisture Protection 7-9

10 tooled concave to shed water. Such diverters shall be painted to match the wall of the building. The construction drawings shall include details for such diverters when they are provided in the project. 1.4 ROOF HATCHES, SMOKE VENTS, AND SKYLIGHTS A. Roof Hatches. 1. At new facilities, provide for safe and secured access by roof hatches (or, when approved, by steel doors in a penthouse enclosure served by stairs) to each flat roof where the roof deck or parapet exceeds 13 feet above adjacent finish grade or ground floor exterior slabs, or as otherwise required for safe and convenient maintenance access to the roof and rooftop equipment and mechanical appurtenances. a. Access to adjacent roofs, by roof hatches or penthouse door, is required if more than 42 inches above the other roof level. b. Fixed external ladders are allowed only between roof decks, and shall not be anchored to the roof deck or rest on the roof surface. 2. Roof hatches, at least 30 inches wide by 54 inches long, or other M-DCPS accepted means of roof access, shall be located in mechanical rooms, electrical rooms, custodial storage rooms, or other custodian controlled lockable spaces. 3. Roof hatch design and installation shall comply with FBC- Building, High Velocity Hurricane Zones designated for the project. 4. Submit to the Building Code Consultant (BCC) calculations, signed and sealed by a Florida registered professional engineer, establishing wind velocity pressure values in accordance with FBC ASCE See Division 5 for ladders. 6. See Division 8 for steel penthouse doors. 7. Coordinate the location of roof hatches with the roof framing in order to accomplish unobstructed access. 8. Roof hatches shall be connected to the school s intrusion alarm system and have a hasp at the interior. 9. A lift open handle shall be located on the ladder side of the roof hatch. B. Smoke Vents. 1. Provide smoke vents in accordance with FBC. 2. Smoke vents design and installation shall comply with FBC Building, High Velocity Hurricane Zones designated for the project. The latched smoke vent cover shall not deform or detach from the building in winds up to 150 mph. 3. Submit to the BCC calculations signed and sealed by a Florida registered professional engineer, establishing wind velocity pressure values in accordance with FBC ASCE Smoke vents shall be twin leaf, with spring counterbalances, and with fully insulated covers and curbs. 5. Provide each smoke vent a manual override internal cable release system in addition to the automatic latch release required by Code. 6. Provide each smoke vent a vent-open detector to register vent status with the building security system. 7. Coordinate location and orientation of smoke vents to permit cover release to be reached from a ladder. C. Skylights. April, 2017 Thermal and Moisture Protection 7-10

11 1. Skylights are not allowed. 2. Existing skylights shall be removed at re-roofing projects unless otherwise directed by M-DCPS. Indicate on the construction drawings complete details for the closure of openings at removed skylights; the construction of the closures shall match the existing structural deck and roofing system. D. See Division 5 Metals for equipment framing supports and clearances. 1.5 FIREPROOFING AND FIRESTOPPING A. Fireproofing and firestopping methods shall be UL approved and shown with UL assembly number listings, and complete specifications, and details in the construction documents. B. Interior steel structural surfaces requiring fireproofing shall receive non-fibered spray-applied fire resistive materials. C. Indicate on the plans and sections of the construction drawings all code-required fire-rated wall/partition and floor/ceiling/roof assemblies being penetrated by pipes, conduits and ducts, and their required ratings, and indicate UL, FM and other tested, accepted firestopping/sealing assemblies that will maintain the required wall/partition or floor/ceiling/roof fire-rating at the penetrations, with complete details and specifications for the selected assemblies. 1.6 JOINT SEALANTS A. Detail and specify the appropriate joint sealants and backings at the following interior or exterior locations. 1. Vertical and horizontal surfaces. 2. Traffic areas. 3. Kitchen areas for vermin protection. 4. Around door and window openings, at both exterior and interior sides. B. Specify single source responsibility for each joint material type. C. Joint sealants, fillers, and other related materials shall be compatible with one another, the joint substrates, adjacent materials, and different assemblies including finishes and the roofing membrane. Colors of sealants shall preferably match as closely as possible to, or be compatible with, the colors of the surfaces abutting the joint being sealed. D. On tilt-up wall panels, joint sealants shall be of vandal-resistant quality from grade level 10 feet above grade. E. The width of non-expansion joints being sealed shall be minimized, as needed to achieve a neat appearance that does not call undue attention to the joint being sealed; the width of expansion joints shall be determined by the amount of expansion occurring across the joint, as determined the structural calculations, or, when such calculations are not feasible, by generally considered good construction practice. April, 2017 Thermal and Moisture Protection 7-11

12 F. Sealed joints shall be indicated as tooled concave, and the sealant shall be oriented so as to shed water away from the joint and away from the building. G. At masonry openings at windows (including, but not limited to, CMU and tilt-up concrete panel construction), the exterior horizontal surface of the windowsill shall be designed to slope not less than 1:3 away from the window frame. The window frames or sub-bucks around the window frames, when provided, shall be set in thick beads of sealant on all sides (sill, jambs and head) H. Aluminum thresholds and saddles at exterior doors shall be set in (preferably, pressed into) heavy beds of sealant. END OF DIVISION April, 2017 Thermal and Moisture Protection 7-12