Urban Areas: 25–40m spacing (concrete poles, 10–12m height)., steel lattice structures). Factors: Cable weight (kg/km) Ice loading (up to 50mm. The Fiber Optic Association, Inc. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet. The charter of the FOA was to promote professionalism in fiber optics through education, certification, and. Deploying fiber above ground on poles or towers removes the need for underground digging and is particularly useful when the ground is uneven, rocky or both. Fiber in a duct solutions have a major aesthetic. Prescribed by the PUBLIC UTILITIES COMMISSION OF THE STATE OF CALIFORNIA GENERAL ORDER No. 128 January 2006 (This Page Intentionally Left Blank) Adopted October 17, 1967 Effective December 12, 1967 Decision No. In addition, the installer must know the cable's weight which is expressed in units of weight/unit length. There are many aspects of optical-fiber cable installation that could be examined, but two of the most important from a practical standpoint are general guidelines for installation in the building spaces most commonly associated with premises wiring-horizontal runs, runs above ceilings and below. Never exceed the maximum pulling load rating. On long runs, use proper lubricants and make sure they are compatible with the cable jacket.