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Home My WebLink AboutASSEMBLY DETAILSASSEMBLY DETAILS " (SEE SHEETS 12-14 FOR FOR INSTALLATION DETAILS) �L EXTERIOR P-HC 103 & EXTERIOR V EXTERIOR U v 67 STANDARD ASTRAGAL #67 L1 WITH STANDARD STILES #60 EXTERIOR BOX ASTRAGAL SHOWN (BOX -OUT) MAY ALSO BE INSTALLED TOWARDS INTERIOR (BOX -IN) 135° mm'sm'' , 0 I'm - ii 'nF We' e EXTERIOR a 61 EXTERIOR 68 E HEAVY-DUTY ASTRAGAL #68 WITH HEAVY-DUTY STILES #61 EXTERIOR BOX ASTRAGAL SHOWN (BOX -OUT) MAY ALSO BE INSTALLED TOWARDS INTERIOR (BOX -IN) 135- OUTSIDE CORNER 01 2-TRACK SHOWN NO CHANGES THIS SHEET. W. N. VENICE, FL 34275 I9471485-16M . CERr. OFAL11H. #29M mvnurrrtemn .. PGTPLVAiWES,NG ' ulwFrrrea sErrv® • 90° INTERIOR EXTERIOR 90° INTERIOR 11E�EXTERIOR V PA LOCK RT 758107-1:1 5 60 OR 67 .. ® INTERLOCK.14 I 5 11 PXTERIOR 7 ITEM #61 (HEAVY-DUTY eNt 90' OUTSIDE CORNER ® 90° INSIDE CORNER STILE) SHOWN, ITEM #60 2-TRACK SHOWN N2 2-TRACK SHOWN (STANDARD STILE) ALSO APPLICABLE, SEE TABLES 1-3, SHEETS 6-8 FOR DP (PSF) ASSOCIATED WITH STILES. 4 INTERIOR MOUC rREVIM 37 U 1�i wtlC fk Pio" PARTL 75 8 107-110 A °°cc °L1.=-��,�L�1 v'p'm*iem OnL- -iYt+o20 4 INTERIOR m• v rba p �aou cm�l to s 135' 61 32 103 EXTERIOR 61 �11111111// ��N........ N,y1''',� 135` INSIDE CORNER � ' t,IGENs ' C 02 2-TRACK SHOWN * : No. 587115 a imlESITO HORIZONTAL SECTION DETAILS, CORNERS % CC '•�?ORIDP.. ' �2� SERIES 670 ALUM. SGD -NON-IMPACT "'s`7S'ONAL 0%G\�� °�` —v- A. LYNN MILLER P.E. ® 9GOS70 NTS 19 d PGTO128 C , P:E.p 58705 h,s � �go�-ol�c2 1 603- I i �I �I SCANNED i f Lucie'c"aunty C> g<AC::, o 8z,s walls. If the finished exterior grade is higher than the interior grade on all sides of the building, then the enclosed area becomes a basement as defined by the NFIP. ■ Final interior grade. The trench that is excavated to construct footings and foundation walls must be backfilled completely, otherwise a basement is created. If the interior grade is higher than the exterior grade, the openings are to be no higher than 1-foot above the interior grade. Installation Examples Interior grade higher than exterior grade Consider a crawlspace enclosure that has its interior grade higher than the exterior grade. As water rises against the outside of the foundation, the ground or fill on the interior balances the hydrostatic load (see Figure 10) 1 It is only when the water rises above the interior grade that the lateral load becomes unbalanced and therefore must be equalized by openings. When viewed from the outside, a,, closed area with the interior grade installation requirements for open terior grade (illustrated in Figure of as -built elevations note the diffi NFIP Elevation Certificate is used, than the exterior grade and it sho 1 foot of the higher of the two gra, d perimeter foundation wall or wall surrounding an en - ;her than the exterior grade will appear to not meet the s. The openings will appear to be too high above the ex - Therefore, it is important that the final documentation ace in interior and exterior grades. For example, if the nments should explain that the interior grade is higher be noted whether the openings are (or are not) within Figure 10. Illustration of flood openings installed within 1 foot of the higher of interior or exterior grade TECHNICAL BULLETIN 1 - AUGUST 2008 15 Figure 9 shows a sketch illustrating where openings could be located when an elevated build- ing has multiple enclosed areas. [Note: the number of openings shown in Figure 9 is for illustration only; the total number of openings and the adequacy of the net open area of those openings depend on the type of opening, covering, and whether vent devices or engineered openings are installed.] Storage Garage Flood openings installed in garage door Figure 9. Sketch of foundation plan o I home with multiple enclosed areas, each with flood openings (number of openings for illustration purposes only) Height of Openings Above Grade The bottom of each opening is to be located no higher than 1 foot above the grade that is immediately under each opening. The purpose of this requirement is to satisfy the perfor- mance expectation that the difference in water levels between the interior- and exterior will not exceed 1 foot as water begins ,to rise and as floodwaters recede from the site. Note that the openings (or those portions that count towards the required net open area) must be located below the BFE. In areas with shallow flood depths, this may require positioning the openings closer to grade than the maximum 1 foot allowed. Given the requirement that the bottom of openings shall not be higher than 1 foot above grade, a question arises if the interior and exterior grades are different: which grade should be used to determine placement of flood openings? The higher of the final interior grade and the finished exterior grade, that is immediately under each opening is used to make this. determination: - ■ Finished exterior grade. Care should be taken when placing backfill, topsoil, and land- scaping materials around the outside of enclosures, especially solid perimeter foundation 14 TECHNICAL BULLETIN 1 - AUGUST 2008 Exterior grade Concrete slab ................. NO • .r D:, situtuiat K. :� •: :F gip• :� o.'ro 777r. FS J Figure 8. Back -filled stem wall foundation (openings not required) Requirements and Guidance for Installation of Openings The NFIP regulations specify ce�'tain installation requirements that must be met by all flood openings, whether non -engineered openings or engineered openings, which are described starting on page 18. The installation requirements address the minimum number of openings and the maximum height of openings above grade. Additional guidance and explanations for various situations are described below. i Minimum Number of Openings Each enclosed area is required to have a minimum of two openings on exterior walls to allow floodwaters to enter directly. In order to meet the requirement, the openings must be located so that the portion of the opening intended to allow for inflow and outflow is below the BFE. Openings that are entirely above the BFE (or any portion of an opening that is above the BFE) will not serve the intended purpose during base flood conditions and thus are not counted towards the compliance with the flood opening requirements. The openings should be installed on at least two sides of each enclosed area to decrease the chances that all openings could be blocked with floating debris and to allow for more even filling by floodwater and draining of the enclosed area. It is recommended that openings be reasonably distributed around the perimeter of the enclosed area unless there is clear justifi- cation for putting all openings on just one or two sides (such as in townhouses or buildings set into sloping sites) . TECHNICAL BULLETIN 1 - AUGUST 2008 The International Residential Code® and the International Building Code® (by reference to ASCE 24) both require a "minimum of two openings on differ- ent sides of each enclosed area." 13 it I I Accessory structures: detached garages and storage sheds Detached garages and detached ing them to be elevated if they and other accessory buildings n must be elevated, flood damage ments for flood openings must collapse, or lateral movement ui Communities are required to regul small storage sheds. Storage sheds with all of the requirements for eni be elevated, flood damage-resistan ments for flood openings must be flotation, collapse, or lateral mover Situations That Do Not Require Two situations that do not require age buildings in A zones may be permitted without requir- iply with all of the requirements for enclosures. Garages be used only for parking of vehicles and storage, utilities stant materials must be used below the BFE, the require - satisfied, and they must be anchored to resist flotation, flood conditions. to all development in SFHAs, including the placement of a A zones are not required to be elevated if they comply osures. They must be used only for storage, utilities must materials must be used below the BFE, and the require- tisfied. In addition, sheds are to be anchored to prevent ent under flood conditions. ■ Manufactured home with skirting ■ Back -filled stem wall foundation nings are described below: Manufactured home with flexible skirting Skirting used to enclose the area under manufactured homes typically is made of weather -resistant material and extends from the bottom of the home down tolgrade. Flexible skirt- ing and rigid skirting that are not attached to the frame or foundation of a manufactured home are not required to have openings. However, where floodwaters are expected to rise rapidly, there may be concerns about the skirting being pushed against foundation systems. In these areas, open lat- tice may be more appropriate to minimize the potential for flood damage. Filled stem wall foundation A filled stem wall foundation (also called k look like a solid perimeter foundation wall � but this type of foundation is backfilled with tural fill that supports the floor slab (see F loads against the walls will be minimized as f chain wall) can om the outside, The National Fire Protection Association's standard, Model Manufactured Home Installation Standard (NFPA 225), specifies that instal- lation of skirting does not trigger the requirement for flood openings provided the skirting does not pro- vide structural support and will collapse under wind and water loads that are less than those expected during the base flood event without causing structural damage to the elevated home or the foundation. acted struc- 8). Because of the fill, unbalanced lateral 'aters, and thus openings are not required. It is important that the final Elevation Certificate, or other documentation of elevations, in- clude an explanation when stem wall foundations are used to avoid the assumption that it is a crawlspace that lacks the required openings. The Elevation Certificate diagrams do not illustrate filled stem wall foundations. A note, in the comment section should describe the foundation so that insurance agents are alerted as to why there are no openings. 12 TECHNICAL BULLETIN 1 - AUGUST 2008 BUILDING PLANNING 1. There shall be not less than two openings on dif- ferent sides of each enclosed area; if a building has more than one enclosed area below the design flood elevation, each area shall have openings. 2. ttam ach 3, enrng sh"la e no rhos han fo (�3Q, mm ) above tMINhi= he of the nal interio grade or floor- and the finished exte- {or.gra a immediatel under each o enin . 3. Openings shall be permitted to be installed in doors and windows; doors and windows without installed openings do not meet the requirements of this section. R322.2.3 Foundation design and construction.IFounda- tion walls for buildings and structures erected in food haz- ard areas shall meet the requirements of Chapter 4. Exception: Unless designed in accordance with Sec- tion R404: 1. The unsupported height of 6-inch (152 'feet plain masonry walls shall be not more than ' feet (914 mm). 2. The unsupported height of 8-inch (203Imm) plain masonry walls shall be not more than i feet (1219 mm). 3. The unsupported height of 8-inch (203 mm) rein- forced masonry walls shall be not more than 8 feet (2438 mm). For the purpose of this exception, unsupported height is the distance from the finished grade of the, under -floor space to the top of the wall. R322.2.4 Tanks. Underground tanks shall be anchored to prevent flotation, collapse and lateral movement under conditions of the base flood. Above -ground tanks shall be installed at or above the elevation required in Section R322.2.1 or shall be anchored to prevent flotation, col- lapse and lateral movement under conditions of the base flood. R322.2.5 Pools in flood hazard areas. Pools that are located in flood hazard areas established by Table R301.2(1), including above -ground pools, on -ground pools, and in -ground pools that involve placement of fill, shall comply with Section R322.2.5.1 or R322.2.5.2. Exception: Pools located in riverine flood hazard areas which are outside of designated floodways. R322.2.5.1 Pools located in designated floodways. Where pools are located in designated floodways, doc- umentation shall be submitted to the building official, which demonstrates that the construction of the pool will not increase the design flood elevation at any point within the jurisdiction. R322.2.5.2 Pools located where floodways have not been designated. Where pools are located in riverine flood hazard areas where design flood elevations are specified but floodways have not been designated, the applicant shall provide a floodway analysis that demon- strates that the proposed pool will not increase the design flood elevation more than 1 foot (305 mm) at any point within the jurisdiction. R322.3 Coastal high -hazard areas (including V Zones and Coastal A Zones, where designated). Areas that have been determined to be subject to wave heights in excess of 3 feet (914 mm) or subject to high -velocity wave action or wave - induced erosion shall be designated as coastal high -hazard areas. Flood hazard areas that have been designated as subject to wave heights between 1 t/2 feet (457 mm) and 3 feet (914 mm) or otherwise designated by the jurisdiction shall be des- ignated as Coastal A Zones. Buildings and structures con- structed in whole or in part in coastal high -hazard areas and coastal A Zones, where designated, shall be designed and con- structed in accordance with Sections R322.3.1 through R322.3.7. R322.3.1 Location and site preparation. 1. New buildings and buildings that are determined to be substantially improved pursuant to the Florida Building Code, Existing Building shall be located landward of the reach of mean high tide. 2. For any alteration of sand dunes and mangrove stands, the building official shall require submission of an engineering analysis that demonstrates that the proposed alteration will not increase the potential for flood damage. R322.3.2 Elevation requirements. 1. Buildings and structures erected within coastal high - hazard areas and Coastal A Zones, shall be elevated so that the bottom of the lowest horizontal structural members supporting the lowest floor, with the exception of piling, pile caps, columns, grade beams and bracing, is elevated to or above the base flood elevation plus 1 foot (305 mm) or the design flood elevation, whichever is higher. 14- 2. Basement floors that are below grade on all sides are prohibited. 3. The use of fill for structural support is prohibited. 4. Minor grading, and the placement of minor quanti- ties of fill, shall be permitted for landscaping and for drainage purposes under and around buildings and for support of parking slabs, pool decks, patios and walkways. 5. Walls and partitions enclosing areas below the design flood elevation shall meet the requirements of Sections R322.3.4 and R322.3.5. R322.3.3 Foundations. Buildings and structures erected in coastal high -hazard areas and Coastal A Zones shall be sup- ported on pilings or columns and shall be adequately anchored to such pilings or columns. The space below the elevated building shall be either free of obstruction or, if enclosed with walls, the walls shall meet the requirements of Section R322.3.4. Pilings shall have adequate soil pene- trations to resist the combined wave and wind loads (lateral and uplift). Water -loading values used shall be those asso- ciated with the design flood. Wind -loading values shall be those required by this code. Pile embedment shall include consideration of decreased resistance capacity caused by 72 - FLORIDA BUILDING CODE — RESIDENTIAL, 6th EDITION (2017) ' 1 I I 11K' Copy. 10171CC. ALL RIGHTS RESERVED. Accessed by John Peterson on Sep 21, 201 �''-,'AM pursuant to License Agreement with ICC. No further reproduction or distri� _.,r,athurized. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS ATION 01: THE FEDERAL COPYRIGHT ACC AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER- BUILDING PLANNING ment and components shall not be mounted on or• penetrate through walls intended to break away under flood loads. Exception: Locating electrical systems, equipment and components; heating, ventilating, air conditioning; plumbing appliances and plumbing fixtures; duct sys- tems; and other service equipment is permitted below the elevation required in Section R322.2 or R322.3 pro- vided that they are designed and installed 'to prevent water from entering or accumulating within the compo- nents and to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the design flood elevation in accordance with ASCE 24. Electrical wiring systems are permitted to be located below the required elevation provided. that they conform to the provisions of the electrical part of this code for wet locations. R322.1.7Protection of water supply and sanitary sew- age systems. New and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the systems in accordance with the plumbing provisions of this code. New and I eplacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into systems and dis- charges from systems into floodwaters in accordance with 1 the plumbing provisions of this code and in accordance 1 with Chapter 64E-6, Florida Administrative) Code, Stan- dards for Onsite Sewage Treatment and Disposal Systems. R322.1.8 Flood -resistant materials. Building materials and installation methods used for flooring and interior and exterior walls and wall coverings below the elevation required in Section R322.2 or R322.3 shall lie flood dam- age -resistant materials that conform to the provisions of FEMA TB-2. Ir 1 R322.1.9 Manufactured homes. In addition to the appli- cable requirements of the state agency with jurisdiction 1 over installation of manufactured homes, installation of 1 manufactured homes in flood hazard areas is subject to the 1 applicable provisions of the local floodplain management ordinance. R322.1.10 As -built elevation documentation. A regis- tered design professional shall prepare and seal documen- tation of the elevations specified in Section R322.2 or- R322.3. 1 R322.1.11 Structures seaward of a coastal control con- struction line. In addition to the requirements of this sec- tion, structures located in flood hazard areas and seaward 1 of the coastal construction line shall be designed to resist 1 the predicted forces of a 100-year storm event in accor- dance with Section R3109 of the Florida fluilding Code, Building, and the more restrictive provisions shall govern. R322.2 Flood hazard areas (including A Zones). Areas that have been determined to be prone to flooding,and that are not subject to high -velocity wave action shall be designated as flood hazard areas. Flood hazard areas that have been delin- eated as subject to wave heights between 1 J%2 feet (457 mm) and 3 feet (914 mm) or otherwise designated by the jurisdic- tion shall be designated as Coastal A Zones and are subject to the requirements of Section R322.3. Buildings and structures constructed in whole or in part in flood hazard areas shall be designed and constructed in accordance with Sections R322.2.1 through R322.2.3. R322.2.1 Elevation requirements. 1. Buildings and structures in flood hazard areas, including flood hazard areas designated as Coastal A Zones, shall have the lowest floors elevated to or above the base flood elevation plus 1 foot (305 mm), I or the design flood elevation, whichever is higher. 2. In areas of shallow flooding (AO Zones), buildings and structures shall have the lowest floor (including basement) elevated to a height above the highest adjacent grade of not less than the depth number specified in feet (mm) on the FIRM plus 1 foot (305 mm), or not less than 3 feet (915 mm) if a depth number is not specified. 3. Basement floors that are below grade on all sides shall be elevated to or above base flood elevation plus 1 foot (305 mm), or the design flood elevation, whichever is higher. Exception: Enclosed areas below the design flood ele- vation, including basements with floors that are not below grade on all sides, shall meet the requirements of Section R322.2.2. R322.2.2 Enclosed area below design flood elevation. Enclosed areas, including crawl spaces, that are below the design flood elevation shall: 1. Be used solely for parking of vehicles, building access or storage. 2. Be provided with flood openings that meet the fol- lowing criteria and are installed in accordance with 14- Section R322.2.2.1: 2.1. The total net area of non -engineered open- ings shall be not less than 1 square inch (645 mm2) for each square foot (0.093 in of enclosed area where the enclosed area is measured on the exterior of the enclosure walls, or the openings shall be designed as engineered openings and the construction documents shall include a statement by a registered design professional that the design of the openings will provide for equalization of hydrostatic flood forces on exterior walls by allowing for the automatic entry and exit of floodwaters as specified in Section 2.7.2.2 of ASCE 24. 2.2. Openings shall be not less than 3 inches (76 I mm) in any direction in the plane of the wall. 2.3. The presence of louvers, blades, screens and faceplates or other covers and devices shall allow the automatic flow of floodwater into and out of the enclosed areas and shall be accounted for in the determination of the net open area. R322.2.2.1 Installation of openings. The walls of enclosed areas shall have openings installed such that: FLORIDA BUILDING CODE — RESI' " IAL, 6th EDITION (2017) 71 ' + 1 1 1 Copy, on ICC. I1.L RIGHTS RESERVED. Accessed by John Peterson on Sep 21, zots ',AM Pursuant to License Agreement with ICC. No further reproduction or distril ithorized. TNY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS ATION OF THE FEDERAL COPYRIGIIT ACC AND THE LICENSE AGREEMENT, ANDSUBJECTTO CIVILAND CRIMINAL PENALTIES THEREUNDER. �~