In Scissor Stairs, standpipe connections are located on alternating floors.

• A. All floors
• B. Alternating Floors
• C. Only the ground floor
• D. Only the top floor

Answer: (B)

Standpipe connections in scissor stairs are placed on alternating floors to match how this stair configuration distributes access points without crowding every level. In a scissor stair setup, the two adjacent stairs are offset on each floor, creating separate routes for occupants and firefighters. By locating standpipe outlets on alternating floors, you get a nearby water source on the floors most likely to be accessed during a response while avoiding a proliferation of outlets that could obstruct egress or complicate the stairwell design. This pattern also helps ensure that supply can be extended to both higher and lower floors as needed from a limited number of connections.