A typical bending moment diagram shown on the previous page shows the following:ġ. Normally cable tray / ladder is connected together forming a continuous beam over several supports. Increasing the span (horizontal distance between supports) will always reduce safe load carrying capacity and increase deflection. A properly specified system will ensure that the stress does not exceed to that which is safe for the materials used in the components.Ī suitable installation will require choice of appropriate style of tray / ladder and the location of supports. Stress will be induced and deflections (vertical displacements) will be observed.
The loads imposed and the type and location of supports will create a pattern of bending moment in the structure. If components are incorporated in an exterior installation there may be other loading factors to consider, such as wind, ice and snow.Ĭable tray & ladder acts as a structural load carrying beam when installed horizontally. If a point load is applied to the tray / ladder it will potentially have a significant effect and this must be quantified.Ģ. The capacity charts provided in this catalogue assume that loading is uniform, both along length and across width. However, it is alwaysĪdvisable to consider that future system requirements can be expected and allow 20% for additions at a later date.ġ.
The weight of cables to be fixed on the system will provide the basic loading data.
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