A Review of Building Evacuation Models - NIST Virtual Library

Table A.11: Fruin data and corresponding colors for density on platforms
(www.crowddynamics.com)
Danger Level 3.59 people/m 2
Jam Capacity 2.15 people/m 2
Desirable Max 1.08 people/m 2
Lastly, Myriad can be used in conjunction with Simulex to test egress rates. This is shown in
figures A.19 and A.20 and allows the user to visualize movement throughout the building.
Figures A.19 and A.20: Myriad and Simulex visualization output for the same building (courtesy of
www.crowddynamics.com)
In certain situations, Myriad can be used to identify the most used spaces as well as identify
potential wasted spaces. This model can be applied to the design and management of different
occupancies, such as car parks, road networks, people and traffic, offices, sports stadia, malls,
rail stations, and other complex spaces. The key elements of Myriad as identified by Still are the
following 74 :
• The speed that operators can produce results
• Ability to test different scenarios
• Ability to evaluate compliance with relevant building codes for both normal and emergency
use.
Output: Myriad assesses escape routes, times, number of interactions (delays), and determines
the exit capacity based on the existing building geometry.
Import CAD drawings: Yes, CAD drawings are used significantly with this model in
producing the network, spatial and egress route analyses. Once the CAD drawing is imported
into the model, the user must identify the scale of the building (this is done by clicking on two
points and entering in the distance for that line).
Visualization capabilities: Yes, this is shown in Figures A.19 and A.20. Myriad is a set of
tools able to show overall congestion/density points as well as individual persons moving
through the building (with the use of tools such as Simulex and STEPs).
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