# Beam Shear Design.

Beam design shear strengths are calculated automatically.

Beam required shear strengths are calculated automatically.

**International Design Codes**

* ACI 318-19 : *Beam Shear Design

* TSC 2018 : *Beam Shear Design Force

**Notation in ACI 318-19**

* A_{v } = *area of shear reinforcement within spacing s, in.

^{2}

*minimum area of shear reinforcement within spacing s, in.*

**A**_{v},_{min }=^{2}

*width of compression face of member, 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 }=*distance from extreme compression fiber to centroid of longitudinal tension reinforcement, in.*

**d =***dead load*

**D =***earthquake load*

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

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

**f**_{y }=*specified yield strength of transverse reinforcement, psi*

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

**l**_{n}_{ }=*unsupported length of column or wall, in.*

**l**_{u}_{ }=*live load*

**L**_{ }=*roof live load*

**L**_{r}_{ }=*nominal flexural strength at section, in.-lb*

**M**_{n }=

**M**_{pr}**=**probable flexural strength of members, with or without axial load, determined using the properties of the member at joint faces assuming a tensile stress in the longitudinal bars of at leasts 1.25

*f*and a strength reduction factor

_{y}*ϕ*of 1.0, in.-lb

**P**_{n}**nominal axial compressive strength of member, lb**

_{ }=

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

_{ }=*rain load*

**R**_{ }=*snow load*

**S**_{ }=*center-to-center spacing of items, such as longitudinal reinforcement, transverse reinforcement, tendons, or anchors, in.*

**s**_{ }=*nominal torsional moment strength, in.-lb*

**T**_{n }_{ }=*factored torsional moment at section, in.-lb*

**T**_{u }_{ }=*nominal shear strength provided by concrete, lb*

**V**_{c }=*design shear force for load combinations including earthquake effects, lb*

**V**_{e }=*Capacity shear force of the column based on the maximum probable moment strengths of the beams framing into the column, lb*

**V**_{e}^{b}_{ }=*Capacity shear force of the column based on the maximum probable flexural strengths of the two ends of the column, lb*

**V**_{e}^{c}_{ }=*nominal shear strength, lb*

**V**_{n }=*nominal shear strength provided by shear reinforcement, lb*

**V**_{s }=*factored shear force at section, lb*

**V**_{u }=*factored load per unit length of beam or one-way slab, lb/in.*

**w**_{u }=*wind load*

**W**_{ }=*strength reduction factor*

**ϕ =***= overstrength factor for the lateral-force-resisting system*

**Ω**_{o}Beam required strength is calculated in accordance with the factored load combinations.

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