FIELD: construction. SUBSTANCE: beam made of steel, or aluminium, or plied wood, etc. , has a steel tie rod made of two tension members and one compressed post. The beam is prestressed by a load constant during temperature and other displacements, by means of a tie. This tie acts as a compressed post. The main sizes of the beam and the tie rod are determined from a system of two differential equations presented in the description. EFFECT: increased strength of the construction. 2 cl, 2 dwg
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