# Beam Design Limits.

Minimum beam depth is controlled automatically.

Deflection limits is controlled automatically.

**International Design Codes**

* ACI 318-19 : *Beam Design Limits per ACI 318-19 with ideCAD

* TSC 2018 : *Dimensional Limit Conditions for Beams

**Notation**

**A _{g }**

**=**gross area of concrete section, in

^{2}

*effective flange width, in.*

**b**_{f }=*web width or diameter of circular section, in.*

**b**_{w }=*dimension of rectangular or equivalent rectangular column, capital, or bracket measured in the direction of the span for which moments are being determined, in.*

**c**_{1 }=*dimension of rectangular or equivalent rectangular column, capital, or bracket measured in the direction perpendicular to*

**c**_{2 }=*in.*

**c**_{1},*modulus of elasticity of concrete, psi*

**E**_{c }=*modulus of elasticity of reinforcement, psi*

**E**_{s }=*specified compressive strength of concrete, psi*

**f**_{c}^{'}_{ }=*specified yield strength for nonprestressed reinforcement, psi*

**f**_{y }=*overall thickness, height, or depth of member, in.*

**h**_{ }=*span length of beam or one-way slab; clear projection of cantilever, in.*

**l**_{ }=*length of clear span measured face-to-face of supports, in.*

**l**_{n }=

**P**_{u}**factored axial force; to be taken as positive for compression and negative for tension, lb**

_{ }=*clear distance between adjacent webs, in.*

**s**_{w}=*strength reduction factor*

**ϕ =****Next Topic**