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The material is that from which the Lateral Load-Resisting System is primarily constructed. If there is more than one Lateral Load-Resisting System, chose the material of the more seismically vulnerable system. Do not include materials that are non-structural or that are not part of the primary Lateral Load-resisting System. For example, if Unreinforced Masonry walls resist the majority of the lateral load in a building where most of the gravity loads are carried by say wood or steel frames, the Material Type of the Lateral Load-resisting System should be listed as Masonry, Unreinforced.
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Flat roofs that are covered with stone slabs (other than slate).
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Grade is the level of the ground at the perimeter of the building. This attribute records the height of the ground floor level of the building above grade.
The height of ground floor level above grade can be recorded as an exact number, or as a range, or as an approximate number. It can also be recorded as unknown.
Grade is usually somewhat lower than the ground floor level, and this information is relevant for flood hazard and foundation seismic performance.
An example of how the height of the ground floor level above grade is measured on a flat site
Height of ground floor level above grade in this dwelling in Cambodia is at least 2 meters (C. Scawthorn)
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It is clear that the roof structure is made from metal, but the type of metal structural system is unknown. The system may be hidden, or information about it is unavailable.
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The building footprint is a shape that cannot be reasonably described by one of the shapes in this table. Buildings with A-, B-, F- or P-shaped plans are included in this class.
Guggenheim Museum in Bilbao, Spain has an irregular plan shape (Left: http://upload.wikimedia.org/wikipedia/commons/1/1d/Guggenheim_Museum,_Bilbao,_July_2010_%2806%29.JPG; Right: map data ©2013 Google, Eusco Jaurlaritza, Gobierno Vasco)
Supreme Court of Canada building in Ottawa has a B-shaped plan (Map data ©2013 Google, DigitalGlobe)
The West Block is a part of the building complex housing the Canadian Parliament (Parliament Hill, Ottawa, Canada); the building has a P-shaped plan (Map data ©2013 Google, DigitalGlobe)
Central Public Library in Vancouver, Canada has a circular plan shape with an opening, plus a free-standing elliptical wall, and an office tower (Map data ©2013 Google, DigitalGlobe)