Abstract: A horizontally elongated wireway hanger of U-cross-section has an integral configuration of sections, i.e. tab and flange, which fit the wireway snugly and securely against a vertically elongated wireway downcomer of U-cross-section. Each U-cross-section is characterized by opposed walls connected by an intermediate saddle. The surfaces of the sections are free from each other, i.e. are not contiguous other than being integrally joined at certain edges. Along the saddle of the downcomer are a series of holes. Along the saddle of the hanger are a series of transverse slots. At least one tab lies in the geometrical plane of the forward wall of the hanger and includes a hole, which is registrable with a hole of selected height in the saddle of the downcomer and by which the hanger may be bolted to the downcomer. A series of parallel transverse slots in the saddle of the hanger is adapted to receive strapping by which a load of conduits may be secured to the hanger.