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21 Cards in this Set
- Front
- Back
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Gravity |
Greatest enemy to buildings. Gravity resistance system to keep standing |
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Tensile-stretches Compression-squeezes Shear-within a building member, being pulled in opposite directions. Often result of wind load Torsional-twisting force |
Types of force all external |
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Stress and strain |
Force per unit area to create a deformation Strain-actual percentage of elongation (deformation) that occurs when a material is stressed |
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Dead load |
Weight of building and any permanently mounted equipment |
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Fire resistance |
Related to mass. More mass equals greater resistance if all other things equal |
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Live load |
Anything not a dead load |
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Braced frame |
Uses diagonal members for bracing. Resists lateral movements |
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Moment frame |
Used special moment connections between columns and beans to resist rotation |
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Moment |
Force causing rotation of a structural member around a fixed point. Where force is applied some distance from fixed point. Opening a book by lifting a corner. Spine is what rotates. Force applied multiplied by distance between force and point of rotation gives the moment |
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Dead load can accurately calculated |
Live load are indeterminable |
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Nfpa 5000 |
building construction and safety code |
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Uniform live load distributed over entire area |
Concentrated load are specific large objects |
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Water |
Gallon equals 8.34 lbs |
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Impact loads |
Loads that are delivered in a short time |
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Lateral impact load |
Such as from an explosion |
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Static loads |
Applied slowly and remain constant. A heavy safe |
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Repeated load |
Applied intermittently. A rolling bridge crane |
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Wind load |
Shear walls used to resist lateral loads |
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Axial load |
Through center of weight being carried |
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Axial load |
Through center of weight being carried |
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Eccentric |
Off center load carrying |
