73 Material Properties

With respect to structural design, the most important property of concrete that must be specified by the structural designer is the compressive strength. The typical compressive strength specified, fc, is one between 3000 and 8000 psi. For steel reinforcement, Grade 60 (American Society for Testing and Materials [ASTM] A615), with specified yield strength fy = 60,000 psi, has become the industry standard in the United States and is widely available (see Photo 7.2). Material properties of concrete relevant for structural design practice are given in Table 7.2.

PHOTO 7.2 Installation of reinforcing bars in the Pacific Park Plaza building (courtesy of Mr. James Tai, T.Y. International, San Francisco).
TABLE 7.2 Concrete Properties

Concrete

Modulus of elasticity,

Modulus of rupture,

One-way, shear baseline,

Two-way, shear baseline,

strength f0 (psi)

57,000p/0 (psi)

7.5P/; (psi)

2p/c (psi)

4P/0 (psi)

0 0

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