Buildings and other structures that represent a substantial hazard to human III

life in the event of failure including, but not limited to:

Buildings and other structures where more than 300 people congregate in one area

Buildings and other structures with elementary school, secondary school, or day-care facilities with capacity greater than 250

Buildings and other structures with a capacity greater than 500 for colleges or adult education facilities

Health-care facilities with a capacity of 50 or more resident patients but not having surgery or emergency treatment facilities Jails and detention facilities

Power generating stations and other public utility facilities not included in Category IV Buildings and other structures containing sufficient quantities of toxic or explosive substances to be dangerous to the public if released

Buildings and other structures designated as essential facilities including, but IV

not limited to:

Hospitals and other health-care facilities having surgery or emergency treatment facilities Fire, rescue and police stations and emergency vehicle garages Designated earthquake, hurricane, or other emergency shelters Communications centers and other facilities required for emergency response Power generating stations and other public utility facilities required in an emergency Buildings and other structures having critical national defense functions

Source: From Minimum Design Loads for Buildings and Other Structures, (ASCE 7-95), American Society of Civil Engineers, Reston, Va., with permission.

ogists and the application of extreme-value statistical analysis to anemometer readings taken at or near the site of the proposed building. Generally, however, minimum basic wind velocities are specified in local building codes and in national model building codes but should be used with discretion, because actual velocities at a specific site and on a specific building may be significantly larger. In the absence of code specifications and reliable data, basic wind speed at a height of 10 m above grade may be estimated from Fig. 6.1.

For design purposes, wind pressures should be determined in accordance with the degree to which terrain surrounding the proposed building exposes it to the wind. Exposures are defined in Table 6.5.

ASCE 7 permits the use of either Method I or Method II to define the design wind loads. Method I is a simplified procedure and may be used for enclosed or partially enclosed buildings meeting the following conditions:


FIGURE 6.1 Contours on map of the United States show basic wind speeds (fastest-mile speeds recorded 10 m above ground) for open terrain and grasslands with 50-year mean recurrence interval. (Source: "Minimum Design Loads for Buildings and Other Structures," ASCE 7-95, American Society of Civil Engineers, Reston, Va., with permission.)

Alaska Note:

For coastal areas and islands, use nearest contour.^7«,^__120(54) > \

Special Wind Region . Population Center


V mph



Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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