J1 - Building Science - LT #3 Flashcards
How does stucco improve the bulding performance to resist damage from a seismic event?
Steel mesh surrounds the structure, and helps distribute forces throughout the structure.
What is a load path?
Continuous transfer of loads down to the foundation.
What is the difference between a braced wall panel and a braced wall band?
A braced wall band is an imaginary continuous straight band extending vertically & horizontally through the building.
Besides location, what factors contribute to a building’s ability to withstand an earthquake?
Building design, shape, and construction.
What is liquefaction?
High water table areas, and soil; can act as a liquid during an earthquake.
What is a fully-blocked diaphragm?
A fully blocked diaphragm requires that all panel sheathing edges not supported by a joist are supported by blocking.
What is the result of overdriving nails by 1/8th when fastening wall sheathing?
Reduced the strength of a wall by as much as 50%
Dynamic forces of an earthquake move the building:
Horizontally.
What is building drift?
Lateral (side to side) movement of a building in relation to a stationary foundation.
A higher amount of drift means
Greater damage a building will suffer during an earthquake.
What is ductility?
Extent that material can bend or twist without breaking.
Denser and solid rock are more desirable why?
Softer soil will amplify shear waves and magnify the effects of an earthquake.
Why are wood frames able to withstand earthquakes?
Lightweight and weight-to-strength ratio
What is a braced wall band?
Imaginary continuous straight band extending vertically and horizontally through the building or part of the building, within which braced wall panels are constructed.
What is a braced wall panel?
Portion of a wood frame wall where bracing, sheathing, cladding or interior finish is designed and installed to provide the required resistance to lateral loads due to wind or earthquake.
