March 2019 AST Magazine March 2019 AST Magazine | Page 13

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March 2019 - Edition 33
ABRA provides a snapshot of where a child care center, church, government building, private
business, school, warehouse, etc., is today, and where it could be in the future
after counter-measures are implemented.
ABRA goes further than simply identifying ple, will not include Layer 1, and unless the
whether a particular layer exists. It also con- building has its own enclave, it will not in-
siders all countermeasures associated clude Layer 2.
with each layer.
In all cases, the asset will have a Layer 3.
In most cases, each layer includes 40–50
individually rated countermeasures, all of If the asset is a building and the building
which are assessed and considered in the has interior spaces that have been identi-
fied as critical areas with controlled access,
ABRA process.
then it will include Layer 4.
In many cases, an asset assessed as part of
this effort will not include all four layers. In situations involving a stand-alone asset
(e.g., water tank, transformer, antenna tow-
A building asset without a physical barrier er), only Layers 1, 2, and 3 would be consid-
delineating the property line, for exam- ered, with Layer 3 being the asset itself. 11