What code replaced the National Building Code in 1927 and was widely used in the western United States?

The correct answer is that the Uniform Building Code replaced the National Building Code in 1927 and became widely adopted in the western United States. The Uniform Building Code was developed by the International Conference of Building Officials (ICBO) to provide a consistent set of regulations and standards for building safety and construction practices.

By establishing a uniform set of guidelines, the code helped ensure that buildings were constructed safely and met the needs of the communities in the western U.S. The prevalence of the Uniform Building Code facilitated better regulation and enforcement of building standards across multiple jurisdictions, thereby enhancing public safety and promoting orderly development.

The other options either refer to codes that were developed later or are not specific to the time period and geographical context mentioned. The International Building Code, for instance, was established later in 2000 to unify the various building codes across the nation, while the State Building Code would vary by state and was not a singular code adopted in the same way as the Uniform Building Code. The Western Regional Code is not a recognized title in the same historical context.