Table of Symbols
| Symbol | Description |
|---|---|
| Ag | Gross area of section |
| As | Reinforcing steel area |
| Av | Shear reinforcing steel area |
| a | Depth of equivalent rectangular stress block as defined in ACI 10.2.7.1 |
| b | Length of critical section in compression |
| beff | Effective flange width as defined in ACI 8.10 |
| bw | Web width when applicable, otherwise b is used |
| bf | Flange width when applicable, otherwise b is used |
| cc | Clear cover from the nearest surface in tension to the surface of the flexural tension reinforcement |
| Cc | Concrete cover to center of tension reinforcement |
| d | Distance from the top of compression surface to center of the flexure reinforcement perpendicular to that direction of the shear plane |
| db | Nominal diameter of reinforcement bar |
| Ec | Concrete modulus of elasticity |
| Es | Reinforcement steel bar modulus of elasticity |
| f'c | Concrete compression stress capacity (psi units) |
| fct | Average splitting tensile strength of lightweight aggregate concrete (psi units) |
| fy | Reinforcement stress capacity (psi units) |
| h | Total section depth |
| ld | Reinforcement bar development length |
| Mn | Nominal moment capacity of concrete section |
| Mu | Factored ultimate moment on section |
| Nu | Maximum factored axial load normal to cross section in shear. Positive for compression and negative for tension. |
| Tu | Factored ultimate torsion on section |
| s | Reinforcement spacing |
| Vu | Factored ultimate shear force on section |
| Vs | Shear reinforcement capacity |
| Vc | Concrete section shear capacity |
| φb | Flexure capacity reduction factor of concrete |
| φT | Torsional capacity reduction factor of concrete |
| φs | Shear capacity reduction factor of concrete |
| δc | Actual concrete density used in footing |
| ρb | Balanced reinforcement ratio |
Bar Set - This identifies a set of bars with the same start and end locations with a given size and quantity of bars.