For vertical shafts in smart buildings, riser-rated (OFNR) fiber optic cables are recommended to prevent fire propagation between floors and comply with building safety codes . These cables are suitable for inter-floor communication, including voice, data, video, and security systems. Both single-mode fiber (SMF) and multi-mode fiber (MMF) options are available:
Vertical shaft cables often include aramid yarn or dielectric strength elements to provide tensile strength and durability during installation in risers, downspouts, or service ducts . The outer jacket is typically flame-retardant (HFFR or similar) to meet fire safety standards. Micro-modules may contain 2–6 colored fibers, allowing flexible deployment and easy identification .
For deep vertical shafts or shafts embedded in concrete, conduit pipes such as Pexgol can be used to transport fiber optic cables safely . Key considerations include:
Vertical shaft fiber optic cables are commonly used for:
When designing fiber optic infrastructure for vertical shafts in smart buildings, select riser-rated, flame-retardant cables with appropriate fiber type (SMF or MMF), reinforced for mechanical stress, and consider conduit solutions for deep or concrete-embedded shafts. Proper planning ensures high-speed, reliable, and safe inter-floor connectivity while supporting future expansion and smart building applications.
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