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The organization that did not participate in the creation of a nationwide fire code and building code is the National Fire Protection Association (NFPA). The NFPA is indeed a key player in developing standards related to fire protection and safety, including the National Fire Code, which is influential but not specifically framed as a nationwide building code.

The other organizations have a direct role in the development or endorsement of a unified building code across jurisdictions. The International Code Council (ICC) develops the International Codes (I-Codes), which include building codes and fire codes used widely across the United States. The Occupational Safety and Health Administration (OSHA) promotes safe and healthy working conditions, which indirectly influences building and fire safety codes through regulations that employers must follow. The American Society for Testing and Materials (ASTM) develops and publishes technical standards for a wide range of materials and products used in construction, which contribute to building safety compliance.

Thus, while the NFPA creates important fire safety standards, it is not specifically recognized as part of the team that established a nationwide fire code and building code like the other organizations mentioned.