Lay-in wireways for a space divider system

A network of electrical raceways primarily for carrying telephone and data cable wires extends in vertical and horizontal directions through a modular partition system and enables vertical and horizontal lines such as signal wires to be inserted and removed from the surface of horizontal and vertical channel members. Vertical raceways are provided by a vertical spine attached between adjacent panels. The vertical raceways have resilient elongated tubes with a longitudinal slit forming a seam, with resilience and stiffness sufficient to retain any enclosed wires. The tube is deflectable to permit manual, forcible insertion and removal of the wires into and out from the vertical wireway. Splicing fixtures continue the raceways around vertical to horizontal diversions, also being accessible from the surface.