Steel hurricane-resistant assemblies can resist winds from 110 to 170 miles per hour. For example, a wind speed of 170 mph produces a design pressure of +49/-53 psf. Then they are rated with a “design pressure,” which is different than wind speed. These specialty door assemblies are tested with the positive and negative pressures that occur in hurricanes. Steelcraft offers a wide variety of hurricane certified doors and frames. In response, many coastal regions have adopted strict building code provisions intended to enhance the structural integrity of commercial buildings. The United States is increasingly struck by hurricanes that inflict loss of life and property damages in the billions of dollars. It is recommended to have a pre-installation meeting with the contractor, specifier, door supplier, and installer to discuss the installation. Proper installation of tornado doors is critical.These components include the frame, door, hinges, anchors, and latching hardware. Tornado assembly components are approved and certified as an assembly and cannot be mixed and matched.ICC 500 is the Standard for the Design and Construction of Storm Shelters.FEMA P-361 offers best practices on the design and construction of safe rooms but FEMA does not regulate construction.No wood door, with or without metal sheathing, has successfully passed FEMA P-361. Steel is the only readily available door material that passes the FEMA 361 and ICC 500 tornado test (250 mph wind speeds). There are more than 1,000 tornadoes in the United States each year, most of which can easily destroy standard doors. Authorities were searching Monday for seven missing construction workers, Xinhua reported.In areas where tornadoes or hurricanes occur, Steelcraft steel doors and frames are the safe choice. In the central city of Yichang, in Hubei province, heavy rain triggered a landslide Saturday that buried a highway construction site and killed one person. It said multiple rivers were likely to rise above safe levels. Meanwhile, the Ministry of Water Resources warned the provinces of Shandong on the east coast and Sichuan in the southwest to prepare for heavy rain from Tuesday to Friday, according to the official Xinhua News Agency. The agriculture ministry warned Sunday that persistent hot weather could damage rice harvests and told local authorities to ensure adequate water supplies to prevent the crop from ripening prematurely. That requires employers to limit outdoor work, though delivery workers for restaurants and online retailers were still working. The weather agency issued an orange alert, its second-highest warning, for heat across southern China and much of the north and northeast. Highs of 35 C (95 F) to 38 C (100 F) were reported in Beijing, Guangzhou in the south, Chongqing in the southwest and Shenyang in the northeast. Temperatures as high as 40 C (104 F) were reported in cities including Shijiazhuang, southwest of Beijing, the capital. BEIJING (AP) - Employers across much of China were ordered Monday to limit outdoor work due to scorching temperatures, while the east and southwest were warned to prepare for torrential rain as the country struggled with heat, flooding and drought.
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