Editing Overpressure (section)

== Calculation for an enclosed space ==
Overpressure in an enclosed space is determined using "Weibull's formula":<ref>{{cite journal|doi=10.1111/j.1749-6632.1968.tb11987.x |title=Pressures Recorded in Partially Closed Chambers at Explosion of TNT Charges |year=1968 |last1=Weibull |first1=Hans R. W. |journal=Annals of the New York Academy of Sciences |volume=152 |issue=1 |pages=357–361 |bibcode=1968NYASA.152..357W |s2cid=84258773 }}</ref><ref>{{Cite patent |country=US|number=4474052|invent1=Bodurtha Jr. |inventor1-first=Frank T. |invent2=Bonifaz |inventor2-first=Cristobal|url=http://www.freepatentsonline.com/4474052.html | title=Laboratory barricade|gdate=October 2, 1984|status=patent}}</ref>

<math>\Delta p = 22.5 \left( {m \over V} \right)^{0.72} \text{bars}</math>

where:
*22.5 is a constant based on experimentation
*<math>m\,</math> = (kilograms) [[net explosive mass]] calculated using all explosive materials and their relative effectiveness
*<math>V\,</math> = (cubic meters) volume of given area (primarily used to determine volume within an enclosed space)