We talk a lot about the need for protection, the changes in our world that have increased the threats, and the requirement to be ‘ever vigilant’. But what are we really protecting against, and why? This article focuses on blast threats, but can be extrapolated to other attack modes. Decisions about whether to provide blast […]
Industry Developments
Four Critical Characteristics Of Blast Waves
An explosion is a rapid release of energy in the form of light, heat, sound, and a shock wave. From a protection perspective, the shock wave is what we are most concerned about. However, as a security professional or an architect, or a procurement official, you may be asking yourself, why do I care? Well, […]
Richard Galli, PE Becomes Associate Principal and Co-Owner of Stone Security Engineering
New York, New York (March 22, 2016 ) – Stone Security Engineering, P.C., the woman-owned small business specializing in protecting people and property from accidental and manmade hazards, announced today that Mr. Richard Galli, PE is now an Associate Principal and co-owner of the company. “This is a major milestone for Stone, and moves us one step […]
WeWork ‘Creator’ Article
I want to thank WeWork ‘Creator’ Magazine for writing such a nice article on us. Check it out here
SDOF vs FEA
When looking at structural design or analysis for response to blast loading, there are two basic analytic approaches that are commonly implemented: Dynamic Single-Degree-of-Freedom Analysis and Dynamic Finite Element Analysis. Dynamic Analysis Dynamic analysis is used when dealing with blast loads. This type of analysis assumes that the load is applied instantaneously (or nearly so), […]
Time Matters: Blast Loads Defined by their “Time History”
Blast loads are defined by their “time history,” which is the trace of over-pressure throughout the load duration. An idealized blast time history is shown in the figure below (after UFC 3-340-01): The pressure (relative to ambient) is on the vertical axis and time is on the horizontal axis. The blast duration is generally taken […]