Overhead fiber optic cable should adopt a galvanized steel strand with the specification of 7/2. 2mm as the suspension wire. Steel messenger strand consists. The unique design of the lightweight AFL Mechanical Suspension supports spans of optical ground wire (OPGW) cable through a wide range of line angle changes. AFL's Mechanical Suspension installs easily while supporting vertical, transverse, longitudinal unbalanced loads and angle pulls without. Our specifications include ASTM 475, which covers metallic-coated steel wire strands, and ASTM A228 (music wire) for optical cables. FO-VC2 JOINT USE - VERICAL MIDSPAN CLEARANCES 48. FO-RI JOINT USE RISER. Durable aerial hardware for fiber utility and telecom builds, including brackets, straps, J-hooks, clamps, grounding, and mounting solutions for pole line and aerial cable support. These Malleable Iron fittings are used with standard pipe near sidewalks and buildings where there is insufficient. The FIBERLIGN Suspension uses a combination of structural reinforcing rods (SRR), outer rods, housing halves, and resilient inserts to reduce compression, clamping, and bending stresses on OPGW and the optical fibers within it. SRR and outer rods cannot be reused.