The choice of the rib thickness in the mass-production of ribbed R/C floors

FENU, LUIGI

2003-01-01

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Abstract

In the mass production of ribbed R/C floors the rib thickness is an important factor of the floor weight. In fact, the thinner the rib, the lighter the floor, but especially if we design R/C floors without shear reinforcements, we cannot make rib too thin because it would be necessary to make too long heavier parts of floor made solid close to the ends. In this way the concrete removed below the neutral axis to make thinner ribs would be recovered in the heavier floor parts. In this paper, for floors without shear reinforcements, we have studied how to choose the best rib thickness to make lighter R/C floors without too long heavier parts close to the ends.