Building and fire codes typically require wet systems with booster fire pumps for structures over how many floors?

In many jurisdictions, building and fire codes stipulate that wet fire suppression systems, such as sprinklers, are required for structures above a certain height. The threshold for requiring booster pumps and other enhancements often aligns with 5 floors. This is because at four stories or fewer, gravity feeding from water tanks or municipal supplies is generally adequate for fire suppression. However, as buildings grow taller, pressure issues arise, necessitating the use of booster pumps to ensure that water can reach upper levels effectively. This critical requirement is designed to enhance safety measures in taller buildings where fire conditions can escalate rapidly, emphasizing the need for adequate water flow and pressure to combat potential fires. Thus, the correct understanding of when such systems are required helps ensure compliance with safety standards and protects life and property.