b " d catwalk compact", the present invention, which consists of bridge (1) with cabins of elevation (5) movable by the motor (4), provides that the shortest distance to be travelled.As well as the final cost of the finished product and less time for the execution of the works.This bridge is composed of a bridge (1), columns that support (2),Motors (4) located at the upper end of the column (2) to move the lift cabins (5) through the mechanism (3) which is located in the central part of the columns (2) carrying the asksStres upwards or downwards.
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