§ 555.222 Table of distances between fireworks process buildings and between fireworks process and fireworks nonprocess buildings.
Net weight of fireworks  (pounds) Display fireworks  (feet) Consumer fireworks  (feet) 0-100 57 37 101-200 69 37 201-300 77 37 301-400 85 37 401-500 91 37 Above 500 Not permitted  Not permitted 
Net weight is the weight of all pyrotechnic compositions, and explosive materials and fuse only.
The distances in this column apply only with natural or artificial barricades. If such barricades are not used, the distances must be doubled.
While consumer fireworks or articles pyrotechnic in a finished state are not subject to regulation, explosive materials used to manufacture or assemble such fireworks or articles are subject to regulation. Thus, fireworks process buildings where consumer fireworks or articles pyrotechnic are being processed shall meet these requirements.
A maximum of 500 pounds of in-process pyrotechnic compositions, either loose or in partially-assembled fireworks, is permitted in any fireworks process building. Finished display fireworks may not be stored in a fireworks process building.
A maximum of 10 pounds of flash powder, either in loose form or in assembled units, is permitted in any fireworks process building. Quantities in excess of 10 pounds must be kept in an approved magazine.