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Proposal to add a new Table 15 to the Taxonomy, to help distinguish nonstructural components (overall, at the building level) with significantly different damageability. In the list below, for example, a building with the former characteristics can be expected to sustain significantly less damage to the nonstructural components compared to a building with the latter characteristics:

• restrained vs unrestrained freestanding cabinets
• anchored vs unanchored electrical equipment
• braced vs unbraced piping systems

Note that Porter (2005) proposes a more comprehensive taxonomy for nonstructural components, but here we require a simpler method that would apply at the building-level.

Porter, K. A. (2005). A Taxonomy of Building Components for Performance-Based Earthquake Engineering. PEER Report 2005/03. URL: https://peer.berkeley.edu/sites/default/files/peer_503_k._porter.pdf

After presenting the GEM Building Taxonomy (v3.1) at the AGITHAR workshop, some colleagues working at UCL on tsunami risk assessment provided me with the following feedback which could be used to enhance the taxonomy:

• Ground floor hydrodynamics (Attribute 9): the hydrodynamics characteristics of upper floors might also be needed, in the case that the tsunami flow depth exceeds the ground floor height.

• An attribute that describes the urban density environment (in particular from the coastline to the building and directly in line/perpendicular to the incoming flow with the building) may also be useful, as the tsunami loading can be affected by other buildings which the tsunami waves may have passed by, to reach that building.

We can reach out to colleagues at UCL (Tiziana Rossetto's group) for further discussions if/when there are plans to take this feedback into account.

This is a reminder to discuss and include support for the volume loss attribute to the GEM Taxonomy

The attribute ID “MIX” appears not to be unique as it is used twice, both in Table 2 (for Material of LLRS) and Table 6 (Occupancy)

Update system ductility strings in Table 3 (Lateral Load-Resisting System) to reflect actual usage in most of GEM's exposure models and in GEM's seismic fragility and vulnerability models.

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