Fred T. Hodgson · Frederick J. Drake and Co. · leaf 459
at less than one-third of the cost. The practicalmeaning of this is, on the one hand, that a beam com-posed wholly of concrete is usually inadvisable, since itslow tensile strength makes it uneconomical, if not actu-ally impracticable, for it may be readily shown that,beyond a comparatively short… … Fi£. 2—Types of Steel Reinforcing Rods. a beam in which the concrete furnishes the compres-sive stress and the steel furnishes the tensile stress.
