2008_Chapter_3_Loads

2008_Chapter_3_Loads - Chapter 3 Loads on Buildings Loads...

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Unformatted text preview: Chapter 3 Loads on Buildings Loads photo source: http://mcdowellowens.com photo source: http://farm1.static.flickr.com Loads on Buildings Loads Gravity loads caused by gravitational Gravity pull, act vertically pull, Photo source: http://www.tha-engineering.com/ Gravity Loads Gravity Dead Loads Live Loads Rain Load Snow Load Floor Live Load Roof Live Load Loads on Buildings Loads Lateral loads caused by wind, water Lateral and earthquakes, impact structure horizontally. Loads on Building Elements Loads Dead load Dead Self-weight of the building - does not vary over Self-weight time. time. Weights of materials and components Estimated with greater certainty than other types of loads Calculated based on material volume X density Live Load Live Load whose magnitude and placement changes with Load time. time. Floor live load Floor Varies with occupancy type occupancy Generally calculated as uniform loads in psf, except Generally in special cases (parking garage - loads concentrated on car tires) on Roof live load (generally 20 psf) Includes weight of repair personnel and temporary storage. If the roof snow load is greater than the live load, it is used instead. Lateral Loads Lateral Wind Loads Earthquake Loads Earth Pressure Water Pressure Blast & Impact Loads Wind Load Primarily horizontal Primarily Also exert an upward force on flat and low slope roofs Loads are resisted by: Anchorage to foundation Wind bracing elements (stiffening elements) Photo source; http://www.aawe.org ...
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