oq-gem

Glossary for gem taxonomy

Authors: Luke Allen, Andrew Charleson, Svetlana Brzev, and Charles Scawthorn

This online Glossary explains around 400 terms contained in the GEM Building Taxonomy v 2.0 and nearly 700 images.

The terms have been listed in alphabetical and numerical order. Text description of each term is accompanied by illustrations (photos and/or drawings) where possible.

We welcome contributions in the form of photographs or images, illustrating glossary terms. If you have any questions you can also contact us at buildingtaxonomy@globalquakemodel.org


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Cast-in-place concrete joists with hollow clay tiles and cast-in-place reinforced concrete topping, sometimes overlaid with roofing. These roofs may or may not have reinforced concrete ring beams at the perimeter.

Hollow clay tiles with cast-in-place concrete joists and topping, Slovenia (WHE Report 73)

Hollow clay tiles with cast-in-place concrete joists and topping, Slovenia (M. Lutman and M. Tomazevic, World Housing Encyclopedia Report 73)

Prefabricated reinforced hollow clay tile beams, with reinforced concrete ring beams, Italy (Maffei et al., 2006)

Prefabricated reinforced hollow clay tile beams, with reinforced concrete ring beams, Italy (Maffei et al., EERI, 2006)

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It is clear that mortar is used in between masonry units, but the type of mortar is unknown. The mortar may be hidden, as in the case of a plastered wall, or information about it is unavailable.

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Any earthen construction type that is known but does not fit the descriptions of the other earth construction types in this table.

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It is clear that the building is a residential building, but the format of the dwellings and number of dwellings in the building is unknown.

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The material is that from which the floor is primarily constructed. Do not include materials that are non-structural or that are not part of the structure of the floor. In many cases floor structures can be overlaid with timber flooring or tiles etc., but it is the structure under that overlay material that should be listed as the material of the floor.

  1. Year unknown [Y99]
  2. Metal, other [MEO]
  3. Infilled flat slab/plate or infilled waffle slab [LFLSINF]
  4. Fired clay

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