Below is the NOAA Tornado activity map as shown previously. %PDF-1.6 % B. Rain load on the undeflected roof, in psf (kN/m, The mapped spectral accelerations for short periods as determined in, The mapped spectral accelerations for a 1-second period as determined in, The maximum considered earthquake spectral response accelerations for short period as determined in, The maximum considered earthquake spectral response accelerations for 1-second period as determined in, The span of the horizontal element in the direction of the tie, between bearing, A coefficient with a value of 1,500 pounds per foot (2.25 kN/m) for, A coefficient with a value of 16,000 pounds (7200 kN) for structures with. Most of the funded research activity has been directed to hurricane amelioration in North America, more specifically oriented to experience along the east coast of the United States and to the Caribbean regions. STRUCTURAL REQUIREMENTS Basic Wind Speed: IRC - 110 mph (3-second gust) IBC - Risk Category I: V ult 130 mph . HOUSTON FIRE DEPARTMENT . It contains absolutely no provision for designing houses to survive winds generated by large-scale EF tornadoes. The area of floor used for parking of automobiles or other, vehicles shall be sloped to facilitate the movement of liquids to a drain. Wind exposure. hb```g``Z`9 2 EY8nG AFe;00t40X8g iq 20*L``3\`xV6Km+b3}pE_6x+-Q54h-A&@ nO under the Texas Public Information Act (See Chapter 552 of the Texas Government Code). 1: Light Air: 1 to 3 mph: Direction of wind shown by smoke drift, not by wind vanes. Building Department Katy City Hall 901 Avenue C Katy Texas 77493 7:00 AM - 5:00 PM Phone: 281-391-4830 Fax: 281-391-4834. The nation's three model code groups decided to combine their efforts, and in 1994 formed the International Code Council (ICC) to develop codes that would have no regional limitations. They are completely different, with maximum tornadoes being four times as destructive as a maximum hurricane. Power-point program [PDF] by Structural Engineer Kenneth A. Luttrell showing the structural analysis of a prototypical reinforced concrete house for a 350 mph wind speed, presented at the annual conference of the Insulating Concrete Forms Association. Enhanced Fujita scale: Damage indicators and degrees of damage for EF4 and EF5 tornadoes. The city of Houston is the no. Designs using TIA-222 for antenna-supporting structures and antennas, provided the horizontal extent of Topographic Category 2 escarpments in Section 2.6.6.2 of TIA-222 shall be 16 times the height of the escarpment. Applicable wind direction if more than one wind exposure is utilized. Note again that there is no reference in the IRC Wind Design map to tornado wind design provisions in the regions shown below. Design spectral response acceleration parameters, For structural roofing and siding made of formed metal sheets, the total load deflection shall not exceed, Flexible, folding and portable partitions are not governed by the provisions of this section. Wind load standards apply to all exterior openings, including garage doors, windows, skylights and doors. EF4 Damage Single Family ResidenceInterior walls and floor above basement missing (Wikipedia), EF5 Damage Example HouseNot much more than the foundation left. Structures that require special consideration of their response characteristics and environment that are not addressed by this code or ASCE 7 and for which other regulations provide seismic criteria, such as vehicular bridges, electrical transmission towers, hydraulic structures, buried utility lines and their appurtenances and nuclear reactors. Original Fujita Wind Scale in use from 1971 until February 2007. The Enhanced Fujita Scale (EF scale) rates the strength of tornadoes in the United States and Canada based on the damage they cause. In the second coastal tier, consisting of the balance of Harris County and Wharton, Bee, Goliad, Brooks, Live Oak, Fort Bend, Victoria, Jackson, Orange, Hidalgo, Wharton, Liberty, Hardin and Jim Wells counties, the standard remains the same as that for Inland II areas, or a three-second gust traveling at 110 miles per hour. The capacity of any vertical gravity load-carrying component, or any group of such components, that, BACKFLOW PREVENTER, REDUCED-PRESSURE-ZONE TYPE, EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS), EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS) WITH DRAINAGE, FIBER-CEMENT (BACKERBOARD, SIDING, SOFFIT, TRIM AND UNDERLAYMENT) PRODUCTS, TEMPERATURE- AND PRESSURE-RELIEF (T AND P) VALVE, WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM, The occupiable floor area is not less than 70 square feet (. The deflection of steel structural members shall not exceed that permitted by AISC 360, AISI S100, ASCE 8, SJI CJ, SJI JG, SJI K or SJI LH/DLH, as applicable. Part III Building Planning and Construction, Chapter 13 General Mechanical System Requirements, Chapter 14 Heating and Cooling Equipment and Appliances, Chapter 19 Special Appliances, Equipment and Systems, Chapter 22 Special Piping and Storage Systems, Chapter 37 Branch Circuit and Feeder Requirements, Chapter 39 Power and Lighting Distribution, Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits, Appendix A Sizing and Capacities of Gas Piping, Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances, and Appliances Listed for Use With Type B Vents, Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems, Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation, Appendix E Manufactured Housing Used as Dwellings, Appendix G Piping Standards for Various Applications, Appendix J Existing Buildings and Structures, Appendix L Conventional Light-Frame Wood Construction for Single Family Residential Construction in High-Wind Areas, Appendix T Recommended Procedure for Worst-Case Testing of Atmospheric Venting Systems Under N1102.4 or N1105 Conditions 5ACH, Appendix U Solar-Ready ProvisionsDetached One- And Two-Family Dwellings, Multiple Single-Family Dwellings (Townhouses). Help If you need more information about our wind statistics for Houston, have a look at our help section. Shingles classified using ASTM D 3161, Class F, are acceptable for use in all cases where special fastening is required. A one-way valve designed to allow air into the plumbing drainage system where a negative pressure develops in the piping. All shingles shall be tested and labeled to comply with the requirements of ASTM D 7158. ii. In the seaward areas of Aransas and Galveston counties, all exterior openings on the structures lowest 60 feet must be made from or covered with an impact-resistant material. Within 1 mile (1.61 km) of the coastal mean high water line where the ultimate design wind speed, V, In areas where the ultimate design wind speed, V. But not one word about tornado protection. Designated emergency preparedness, communications and operations centers and other, Power-generating stations and other public utility. endstream endobj startxref A water pipe that extends vertically one full. (ASCE 7 Figure 30.10-1) C. Roofing: 1. Asphalt shingles shall be installed in accordance with Section R905.2.6. "Let us hope the next bad one happens in a rural area instead" where not so many people will be killed and not so many houses will be converted to kindling. The total, A concentrated load of 40 pounds (0.176 kN) applied to an 8-inch-diameter (203 mm). Box 12030, Austin, TX 78711 | 512-676-6000 | 800-578-4677, Section 100 General Requirements thru Section 200 Basic Definitions, Assumptions, and Limitations of the Prescriptive Code, Section 300 Prescriptive Requirements Area Inland of Established Dividing Line, Section 400 Prescriptive Requirements Area Seward of Established Dividing Line, State Auditor's Office Hotline: 800-TX-AUDIT. The MWFRS and the components and cladding of every building or other structure shall be designed for the pressures calculated using Equation 16-35. Fire Codes Speed: Per local jurisdiction, typically as shown in Table 1. No warranty is made by TDI regarding specific accuracy or completeness. Start Claims Process. B. Cantilever Overhangs: Cantilever overhangs exceeding six feet shall be designed for a wind pressure of 54 pounds per square foot acting in an upward direction. Cities do not provide engineering services to wind limitations (IRC R301.2.1) or inspect for the high wind standards of engineered structures. Garage & Carport floor surfaces shall be of approved noncombustible, material. STRUCTURAL REQUIREMENTS Basic Wind Speed: IRC - 110 mph (3-second gust) IBC - Risk Category I: V ult 130 mph . Storage warehouses (shall be designed for heavier, Exterior columns without cantilever slabs. CODE OF ORDINANCES City of HOUSTON, TEXAS Codified through Ordinance No. 481 0 obj <>stream 888-752-6794 Email Sales Chat with Us Plugins My Account . not allow a 6-inch drop in the first 10 feet. 6:25 am. The City of League City revised its Chapter 22 Buildings and Building Regulations (PDF) ordinance. The program is applicant driven. There must be at least 75% or greater evidence of support from the residents in the directly affected area before a segment can be privately funded. Winter Design Temp. The deflection of aluminum structural members shall not exceed that permitted by AA ADM1. The horizontal resolution is about 13 km. R905.2.4.1 Wind resistance of asphalt shingles. El Dorado County's minimum wind speed shall be determined from CBC Figure 1609.3 or CRC Figure R301.2(5) except in the Special Wind Region (eastern area of the county). To an imaginary line between two buildings on the. The program also includes the ability for residents to privately fund the construction, but the project must meet the specified eligibility requirements. Elevator machine room and control room grating, 12. This translates to about 70mph in basic wind speeds. Designers of record The length of the tile shall be between 1.0 and 1.75 feet (305 mm and 533 mm). Chapter 3 Use and Occupancy Classification, Chapter 4 Special Detailed Requirements Based on Use and Occupancy, Chapter 5 General Building Heights and Areas, Chapter 7 Fire and Smoke Protection Features, Chapter 15 Roof Assemblies and Rooftop Structures, Chapter 25 Gypsum Board, Gypsum Panel Products and Plaster, Chapter 30 Elevators and Conveying Systems, Chapter 32 Encroachments Into the Public Right-of-Way, Chapter 33 Safeguards During Construction, Appendix C Group UAgricultural Buildings, Appendix E Supplementary Accessibility Requirements, Appendix K Conventional Light-Frame Wood Construction for High-Wind Areas, Appendix L Earthquake Recording Instrumentation, Appendix L Life-Safety Requirements for Existing Buildings, Appendix M Tsunami-Generated Flood Hazard, Appendix N Airport Sound Attenuation Requirements. Lift coefficient. SUBJECT TO DAMAGE FROM. Please follow Project Dox procedures when uploading files. No. Words used in the present tense include the future; words in the masculine gender include the feminine and neuter; the singular number includes the plural and the plural, the singular. Note: For current information regarding the Neighborhood Traffic Management Program, visit It will NOT version. The alternate wind design provisions in this section are simplifications of the ASCE 7 Directional Procedure. Special Wind Region Map [.pdf, 4.39 MB] **NOTE** The maps are currently unavailable and we are working on the issue. To be eligible for TWIA coverage, a property must meet certain requirements established by the Texas Legislature. Agricultural storage structures intended only for incidental human occupancy. 2015 International Existing Building Code (, 2015 International Property Maintenance Code (, 2015 International Swimming Pool and Spa Code (, 2015 International Residential Code for One and Two-Family Dwellings (, 2015 International Fire Code, Appendices B through E and Appendix I. Wind Speed 140mph or greater (IBC 2009 = 120mph & greater) = Wind-borne debris region . In the Houston metro area, seven utility-scale wind energy generation establishments employ 766 workers with an average weekly wage of $2,694the second highest weekly wage in the nation. Obj < > stream 888-752-6794 Email Sales Chat with Us Plugins My Account of D! Is no reference in the IRC wind design provisions in this section are simplifications of the ASCE 7 Directional.... Times as destructive as a maximum hurricane ( 3-second gust ) IBC - Risk Category I V... 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