Explosive blasts create additional overpressure loadings. That are typically not accounted for. In conventionally designed buildings. The performance of building envelopes and cladding components.
So the purpose of blast resistant design is to minimize the hazards caused by a blast as opposed to preventing damages
Performance conditions established by. GSA are categorized by breakage characteristics ranging from 1. Which allows no breakage, to 5, so where breakage debris travels 10-ft or farther from the window.
Various approaches may be used when designing fenestrations for blast-resistance. These include particular design of the glass or window frame components; increased anchorage of the window assembly itself; structural augmentation of the surrounding wall structure; or separate shielding systems and mechanisms designed to catch the debris and also use of laminated glass.
The Unified Facilities Criteria (UFC) system provides “planning, design, construction, sustainment, restoration, and also modernization criteria” for all Department of Defense projects. It is accessible through the Whole Building Design Guide electronic media source. A program of the National Institute of Building Sciences.
UFC 4-010-01 DoD Minimum Antiterrorism Standards for
Buildings document was most recently updated in February 2012.
And includes blast resistance criteria for windows in both new and existing facilities. This criteria applies provisions for glazing, framing, connections and supporting structural elements. It includes standards for dynamic analysis, testing and explosive weights associated with respective standoff distances.
In addition to specific requirements for glass size. Lamination, deflection limitation, and testing. UFC design criteria is generally based on. ASTM F 2248. Given project-specific standoff distance and. TNT-equivalent size.
This load is then used for design of the assembly frame. Glazing frame bite, connections, and supporting structural elements.
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We work exclusively in glass, glazing and also metal panel design.
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So we choose our battles, as your advocate, we are always working hard to balance practical time and material constraints with safety, code adherence and liability concerns. We also enjoy long term relationships glazing contractors and manufactures who value excellence.
We are experts in curtain wall engineering, storefront engineering, zoo exhibit underwater glass enclosure design, skylight engineering & design, glass railing engineering, glass floor design, all glass design, aluminum metal panel engineering. All glass and metal panel engineering.
Consulting services have included pre-construction engineering design reviews for commercial contractors, structural inspections, and also analysis of existing structures and speaking / training events.
JEI Structural Engineering are experts at providing high quality structural engineering services to the commercial glazing industry. Services include calculations for curtain wall engineering, storefront engineer, all glass systems engineering, submerged glass and zoo enclosure engineer design and also window blast engineering for DOD and GSA projects using WINGARD.
Design calculations encompass stress analysis, deflection analysis, system connections and anchor design to the structure. JEI also provides value engineering, training and development of MR’s and PM’s.
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