In TYPE 1 buildings, which layout category typically features central access via a core that houses elevators and stairs?

• A. Center hallway
• B. Center core
• C. Combination
• D. Atrium

Answer: (B)

In TYPE 1 buildings, the central access pattern is defined by a core that houses the elevators and stairs, serving as the building’s vertical circulation hub. This central core acts as a protected backbone, concentrating life-safety elements in one location while the floor plates wrap around it. The benefit is a predictable, quick route to exits on every floor, improved fire separation, and greater structural efficiency for high-rise construction, since the core provides stiffness and a compact area for shafts and lobbies. Other layouts place circulation differently: a center hallway relies on a long central corridor rather than a shared vertical core; an atrium centers around a large void rather than a siloed core; a combination mixes features but doesn't inherently establish a single core that houses elevators and stairs. Hence, central core best matches the described arrangement.