When installing a heavy backbone cabling vertically, recommended methods of securing the cable include all of the following EXCEPT:

Tie wraps (plastic cable ties/zip ties) are explicitly excluded as a recommended method for heavy vertical backbone installations because they create a narrow contact point that concentrates cable weight at one location, which can cut into or deform the cable jacket and damage conductors over time. ANSI/TIA-569 specifies methods such as straps, brackets, or mesh grips that distribute cable weight more evenly to prevent mechanical damage and maintain cable integrity in vertical pathways.

Brackets are an approved and recommended method for supporting heavy backbone cables in vertical pathways, providing rigid, distributed support without damaging the cable.

Steel or plastic straps are acceptable fastening methods because they distribute clamping force over a wider contact area, reducing the risk of jacket damage compared to narrow tie wraps.

Collar or mesh basket grips are specifically engineered for vertical cable support, gripping the cable jacket evenly and safely distributing the weight of heavy cable bundles.

Steel cable ties, when used with appropriate cushioning, are an approved method for securing heavy cables in vertical runs and are distinct from lighter plastic tie wraps not rated for such sustained loads.