On what type of building are wet standpipes typically used?

Wet standpipes are typically used in tall buildings due to their unique fire safety needs. These systems are designed to provide water for firefighting quickly and effectively at various levels of a structure, especially where access to water supply can be challenging. In tall buildings, firefighters need to be able to reach higher floors easily, and wet standpipes ensure that there is a constant supply of water available at these heights.

In contrast, residential buildings, single-story buildings, and even some commercial buildings may not require the same robust firefighting measures. These structures often can rely on simpler fire protection systems because of their lower height and easier access, making wet standpipes unnecessary. Hence, the presence of wet standpipes is specifically crucial in tall buildings where the fire department needs a reliable water source that can be accessed quickly across many levels.