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Light Gauge Steel Trusses (LGST) are one of the most commonly used roof systems in current construction  due to their light weight, long-span capabilities, design flexibility (many slopes and geometries), and fast erection times. 
 
Starting with the 2012 version of UFC 4-010-01, “DoD Minimum Antiterrorism Standards for Buildings”, all roof systems must be shown to provide an adequate Level of Protection (LOP) against the applicable blast loads.
 
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