What is the required separation time for townhome units when a suppression system is in place?

The correct answer is based on the building code requirements for separation between townhome units when a suppression system, such as a sprinkler system, is installed. The International Building Code (IBC) allows for reduced fire-resistance ratings when certain fire protection systems are in place.

In the case of townhome units, if equipped with an approved automatic fire suppression system, the required fire-resistance rating between units can be reduced to 1 hour. This is based on the understanding that the suppression system will effectively manage and mitigate fire spread, thereby reducing the need for a more stringent separation that would typically be required in the absence of such fire protection measures.

This allows for more flexible design options and can lead to cost savings while still maintaining safety standards. Compliance with these requirements is essential for ensuring that townhomes provide adequate safety measures without unnecessarily increasing construction costs.