{"operation":"document","citation":"49 CFR 176.145","title":"Segregation in single hold vessels.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) On board a vessel having a single cargo hold, Class 1 (explosive) materials in hazard division/compatibility group 1.1B and 1.2B may be stowed in the same compartment with substances of compatibility group D, provided:\n\n(1) The net explosive weight of the compatibility group B explosive does not","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-176-145.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-176-145.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-176-145","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-176.145","body":"(a) On board a vessel having a single cargo hold, Class 1 (explosive) materials in hazard division/compatibility group 1.1B and 1.2B may be stowed in the same compartment with substances of compatibility group D, provided:\n\n(1) The net explosive weight of the compatibility group B explosive does not exceed 50 kg (110 pounds); and\n\n(2) The compatibility group B explosive materials are stowed in a steel portable magazine that is stowed at least 6 m (20 feet) from the compatibility group D substances.\n\n(b) Division/compatibility group 1.4B (explosive) materials may be stowed in the same compartment with substances of compatibility group D provided the Class 1 (explosive) materials of different compatibility groups are separated by either a distance of at least 6 m (20 feet) or by a steel partition.\n\n[Amdt. 176-30, 55 FR 52696, Dec. 21, 1990, as amended at 66 FR 45384, Aug. 28, 2001]","truncated":false,"body_characters":892}