Monorail systems in certain cases offer an excellent alternative to the traditional BMU units. Monorail is by far considered as the most cost-effective and efficient window cleaning system in terms of purchase and running cost and having very minimal operation process. BATCO recommends the installation of a custom-made monorail system.

The monorail is combined with powered cradle, the monorail is an extruded aluminum element fixed outside of the building supported by steel bracket anchored to the concrete wall at intervals ranging from 1.5m to 2.5m, and used as a track way for trolleys from which the cradle will be suspended, it allow the cradle to traverse along the façade, these trolleys can be either manual or electric motorized trolley

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