The International Association of Plumbing and Mechanical Officials has been protecting the public’s health and safety for ninety years by working in concert with government and industry to implement comprehensive plumbing and mechanical systems around the world.

As a membership-based association, IAPMO is proud to utilize an open consensus process in the development of our flagship Uniform Plumbing Code® and Uniform Mechanical Code®. These codes are established through scientific research, debate, and analysis, strengthening our position at the forefront of the plumbing and mechanical industries.

The IAPMO Group is a complete service organization, providing code development assistance, industry-leading education, plumbing and mechanical product testing and certification, building product evaluation and a manufacturer-preferred quality assurance program. Each component of the IAPMO Group works toward playing an integral part in protecting the health of people everywhere.



Responding to a request, we are making some of the online Answers and Analysis offered only to IAPMO members available here.

  1. Do the requirements for UMC Section 510.7.2 apply to a building more than one story and one story building where roof ceiling assembly is required to have fire-resistance rating?
  2. If yes, is it the intent of the code that other single story buildings that are not a part of Section 510.7.1 shall be governed by Section 510.7.2.1?
  3. Would Section 510.7.2.3 still apply if Section 510.7.2.1 is met? (i.e. building is single story and has a enclosure of 1 hour or more and is not a building as defined in Section 510.7.1 or Section 510.7.1.1)