What Is a Blast-Resistant Design Requirement?
Blast-resistant design (the UFC 3-340-02 — the DoD's; the GSA's — the ISC) hardens the structure against the explosion (the standoff — the distance; the charge — the weight; the response — the ductility). The requirement: the threat's (the defined), the performance's (the damage's — the levels), and the detailing's (the ductile — the connections'). The protective design — the building surviving the blast.
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The threat and the standoff
The charge (the TNT-equivalent — the weight; the vehicle — the VBIED), the standoff (the distance — the protection's; the barriers' — the bollards), and the pressure (the reflected — the impulse; the duration).
Design approach
The SDOF (the single-degree — the analysis; the ductility — the response), the facade (the glazing — the laminated; the frames' — the bite), the structure (the ductile — the detailing; the progressive — the collapse's prevention), and the performance (the damage levels — the repairable to the blowout). UFC 3-340-02 — the manual.
When required
The federal (the DoD/GSA — the standards; the ISC's), the high-risk (the iconic — the threat's; the owner's), and the petrochemical (the vapor — the explosion's; the spacing). The blast is the abnormal — the standoff first, the hardening second.
The bottom line
Design for blast per UFC 3-340-02/GSA-ISC (defined threat, standoff via barriers, SDOF ductile response, laminated glazing) — prioritize standoff distance, then harden structure and facade.
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