slab

The paper studies the theoretical calculations of the material and human resources that is needed for manufacturing and construction the spatial grid-cable steel-concrete composite slab. Some comparative characteristics of the construction were estimated such as weight, bearing capacity etc. The spatial grid-cable steel-concrete composite slab is the new kind of a construction for long-span roofs and shells. The feature of the construction is in its the constructive concept. This construction consists of the diagonal members, the top and the bottom chords.

A system of electrons in a metal slab, which is described by the jellium model, is considered. The potential that forms a surface of the slab is modeled by the infinite square well potential. By using some approximations, the analytical expressions for effective inter-electron interaction inside the slab and outside it are obtained.