One of the toughest implementations to manage successfully can be when installing fiber at a Brownfield site, as we recently found at Denver University in Colorado.
Often crews won’t know what is already in place, making it difficult to plan, and forcing installers to think on their feet and reroute cables to fit into the available space.
The difficulty is compounded when buildings have been constructed before the 1930s - a time when building codes were more relaxed (or non-existent). Wherever they are located in the US, most of these don’t have integral ducts, and no-one currently employed has any knowledge of the structural details of how they were built. Spaces are normally cramped, leading to fiber being routed through multiple 90 degree bends to reach its destination.
Adding to the potential headache, many buildings will have already been retrofitted with telephone or power cables after they were built, and the plans may not be available. Finally, particularly for older buildings, the aesthetics cannot be disturbed, so the installation has to respect the existing fabric, which may be structurally fragile by now.