The paper presented the model of a problem of choosing the location of a car crane for the installation of prefabricated elements in a given assembly situation with the solution proposal. The issue relates to the situation, in which the dimensions of the shielding structure (assembled) are specified, sizes and weights of the prefabricated elements with their location on the structure. The solution seeks the best location of a crane from the point of view of the parameters of the crane, scope and height of the lift.