On the rib

Rearing arches on the rib can also be performed similarly to the overcrowding of columns using goat supports and winches. In the first and second cases, concrete of the lower faces of both ends of the arch, around which the arch makes a rotational movement, is subject to significant efforts. In the process of designing the technology of rolling on the rib, it is necessary, in addition to all the current efforts, to take into account these. The overcast of large -sized arches on the rib cannot be performed in the way described above, since there are unacceptable stresses and, in addition, the edges on the edges of the arch may be damaged. Due to the significant pressure produced by the faces on the ground, the arch can be so burnt into the underlying layer that its rolling into the rib will generally become impossible. An example of a relatively simple method of overcast of large -sized arches is to install a warehouse on the rib of arches according to the project Miklosh Gnedin. The length of the chord is a half -broth equal to 33 m, the weight of the kayagda half -air was 40 tons.