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Structural Concrete - Hassoun

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2.19 Steel Reinforcement 77<br />

Table 2.22<br />

Nonprestressed Plain Spiral Reinforcement<br />

Maximum Value Of<br />

f y<br />

or f yt<br />

Permitted<br />

for Design<br />

Applicable ASTM Specification<br />

Usage Application Calculations, psi Plain Bars Plain Wires<br />

Lateral support of<br />

longitudinal bars or<br />

concrete confinement<br />

Spirals in<br />

special seismic<br />

systems<br />

100,000 A615, A706, A955,<br />

A1035<br />

Spirals 100,000 A615, A706, A955,<br />

A1035<br />

Shear Spirals 60,000 A615, A706, A955,<br />

A1035<br />

Torsion in<br />

Spirals 60,000 A615, A706, A955,<br />

nonprestressed beams<br />

A1035<br />

A1064, A1022<br />

A1064, A1022<br />

A1064, A1022<br />

A1064, A1022<br />

Figure 2.7 Typical stress–strain curves for some reinforcing steel bars of different<br />

grades. Note that 60-ksi steel may or may not show a definite yield point.

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