Inspired in the principles of operative flexibility, production simplification, total quality, precision and speed in the assemble, the transport anchor systems were developed to expedite the processes of transport and assemble pre-cast concrete elements.

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Advantages of the systems:

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• Agility and speed in the deform, transport, load, unload and assemble;

• Savings on expenditures with labor and rental of equipment such as cranes;

• It allows perfect superficial finishing of the elements during the process;

• Replaces the salient straps, easing the stacking;

• Eliminates the undesirable and costly re-works for elimination of the straps and repair of the elements.

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In order to calculate the effort in the anchor, it is necessary to consider several factors as well as the architecture of the cables, chains or belts:

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• Element’s own weight, including humidity;

• Eventual asymmetric repartition of weight in elements with asymmetric shapes;

• Statically uncertain lifting;

• Lifting through multiple cables;

• Suction effect between the element and the formworks;

• Resistance of the concrete during transportation;

• Vibration effects of the cranes or others equipments;

• Safety and wind secondary values;

• Tilted lifting traction in horizontally produced panels.

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The “S” in the anchor is determined by the equation      S =  G . Y . a      where:

                                                                                               b . e . c

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G = Own weight with humidity
a = Suction factor to be taken in consideration in elements where the surface of contact with the shape, during the deform, is equal or greater than half of the total element surface;

 

• Flat elements (flat slabs and panels) a = 1,3

• Ribbed elements  a = 1,6

• If the contact surface is equal to 1, adopt a = 2,5

c = Number of anchors
e = Weight asymmetric distribution factor – For symmetry e=1

b = Loss factor due to the architecture inclination of the cables