Cable ladders

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Cable ladders

Cable ladders are used to route wires and cables in places where traditional flush-mounted electrical installation cannot be used or its routing is not justified for ergonomic or economic reasons.

The system of ladder routes is perfect for use in industrial plants, but also in sheet metal halls for various purposes, in compliance with safety rules, regulations and building rules.

Cable ladders - a system for leading wires and cables with larger cross-sections

Metal routing systems for power cables and wires include metal and mesh cable trays as well as cable ladders. The latter, due to their reinforced structure, are dedicated to the installation of wires and cables with large cross-sections and weight. Cable ladders are also used where technical possibilities require longer span lengths and less frequent use of supports. Horizontal self-supporting (wide span) ladders are especially effective here.

The openwork structure of the ladders ensures good ventilation of wires and cables and influences their cooling, while the material of manufacture guarantees a different degree of protection against corrosion, depending on environmental requirements. Steel sheets from which ladders are made can guarantee:

  • basic protection (galvanized with Sendzimir method),

  • F (hot-dip galvanized),

  • E (stainless steel),

  • L (painted in a RAL color).

Cable ladders constitute a large group of products, within which it is possible to divide according to their purpose (e.g. general-purpose ladders, marine and fire ladders), structure (self-supporting, with a large number of supports) or installation method (vertical and horizontal). The most common are general-purpose ladders installed in a combined vertical and horizontal system.

Cable ladder elements

The basic cable ladder is made of perforated side boards connected by rungs of various shapes, widths and purpose. Working sides can have different heights, even up to 200 mm, while rungs allow to fix cables and wires with holders, which is especially important in the case of vertical sections.

System of horizontal routes

Each system of horizontal routes consists of horizontal ladders, supporting elements, most often fixed to the ceiling, and accessories such as screws, cable holders or clamps. Among the elements for horizontal cable and wire routing, the following are distinguished:

  • straight ladders and arches,

  • tees for connecting three ladders,

  • crosses connecting four ladders,

  • symmetrical and asymmetrical reductions, thanks to which it is possible to pass between wider and narrower ladders,

  • connectors - short side sections enabling the connection of ladders with each other or with cross sections, tees or vertical sections.

Horizontal sections of ladders are attached to the ceiling, and depending on its type, a system consisting of threaded rods, ceiling fixings and supports for horizontal sections to which the ladder is attached can be used, as well as slings made of ceiling bases ( elements attached directly to the ceiling), U-profiles (vertical sections between the base and the bracket) and brackets.

Vertical system

Vertical system is most often combined with a horizontal system, and the task of vertical ladders is to route sections of wires and cables running in the floor to horizontal ladders located under the ceiling, or sections leading from horizontal ladders to assembly stations, production lines, machines or electrical switchboards e.t.c.

An important issue in the case of vertical ladders is fixing cables and wires to the rungs - it must be reliable and universal at the same time, easy to assemble and disassemble. For this purpose, there are cable holders, i.e. metal clamps with an adjustable grip.

Sea and fire ladders

Sea and fire ladders are special-purpose systems where the material of manufacture is the most important. In the first case, the product must provide protection against increased corrosion in the maritime climate - such ladders are used in port installations, on oil rigs and ships. Fire ladders, on the other hand, ensure the stability that allows electricity to be supplied through the cables in the event of a fire. Therefore, they are resistant to high temperatures and completely non-flammable.