Element of support of the in form net of L inverted, of an approximate longitude of 8,00 m and an arm of 1,50 to 2,00 m. It manufactures in tube of rectangular or square section of a single piece or two halves that it is stuffed and it is united with bruising-female screw tree and nut. The horizontal arm and departs of the vertical circle it disposes of form into rings guide or small pulleys for the aided step y of the cords of hoisted. Your placing must depart from a corner of the framework (by means of marking out the ground plan), being the approximate distance between two supports of 4,50 ms.


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