Nov 19, 2021 · When designing a system, you first need to determine the supply pipe size, hose connection location, size, and pressure based on the standpipe classification.

Class I – 2 ½ inch fire department connections that provide the required pressure and flow for structural firefighting. Class II – 1 ½ inch legacy hose connections used by trained occupants …

Dec 5, 2018 · There are three classes of standpipes. Class I standpipes are for trained firefighter use. They have a 2 ½-inch outlet and are capable of flowing a minimum of 250 gallons per …

Aug 10, 2016 · A Class I standpipe system is required to flow 500 gpm (gallons per minute) at the most hydraulically remote standpipe through the two most remote outlets. Previous editions of …

Apr 25, 2022 · Class I standpipe: These are for buildings with over three stories, and the fire department is the only one that must use them. It includes a 2 ½ inch hose connection; …

Apr 26, 2021 · There are six exceptions allowing only the Class I portion of a Class III standpipe: a. Class I standpipe is allowed in sprinklered buildings. b. Class I standpipe is allowed in …

May 10, 2019 · Where are standpipe systems required and what are the different types of systems?

Class I standpipes are designed for use with 21⁄2-in (65-mm) hoses and are intended for heavy fire streams [i.e., 250 gpm (946 lpm)] operated by the fire department. Class I standpipes are …

A standpipe or riser is a type of rigid water piping which is built into multi-story buildings in a vertical position, or into bridges in a horizontal position, to which fire hoses can be connected, …

May 18, 2024 · Selecting the proper system type for each class: Class I standpipe systems in non-high-rise buildings shall be permitted to be automatic dry, automatic wet, semiautomatic …