Electrical Distribution in Buildings
The National Fire Protection Association National Electrical Code is the basic safety standard for electrical design for buildings in the United […]
Electric Elevators
An electric-elevator installation requires, in addition to the car described in Art. 16.8 and the hoistway components described in Art. 16.7,
ElarmS: Earthquake alarms systems for California
In Southern California, an earthquake-prone area, many cities are under earthquake risks, hence earthquake early warning systems are becoming an important
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Elasticity (Dimensional stability)
The definition of pure elasticity is that strains appear and disappear on application and removal of stress. The elastic properties
Effects of Grain Size
As indicated in Fig. 1.14, when a low-carbon steel is heated above the A1 temperature line, austenite, a solid solution of
Effects of Chemistry on Steel Properties
Chemical composition determines many characteristics of steels important in construction applications. Some of the chemicals present in commercial steels are a
Effects of Punching Holes and Shearing
Excessive cold working of exposed edges of structural-steel members can cause and cracking and should be avoided. Punching holes and
Effects of Thermal Cutting
Fabrication of steel structures usually requires cutting of components by thermal cutting processes such as oxyfuel, air carbon arc, and
Effects of Hygroscopic Properties of Wood
Because of its nature, wood tends to absorb moisture from the air when the relative humidity is high, and to