How to calculate the length of compressed farm elements
The estimated length of the compressed elements of the farm when taking into account the longitudinal bend is taken equal:
– when calculating in the plane of the farm: for the upper belt – the distance between the centers of the nodes, for the elements of the lattice – the distance between the centers of the nodes multiplied by the coefficient of 0, 8;
– when calculating from the plane of the farm: for sections of the upper belt – the distance between the nodes fixed from displacement in the longitudinal direction, and for the lattice – the distance between the centers of the nodes.
Depending on the category of crack resistance of the designed farm, its stretched pre -tense elements are counted on crack resistance by the formation or disclosure of cracks. The farm must also be calculated for the efforts that arise in it in the manufacture and installation.