# Square T Beam

Written by Jerry Ratzlaff on . Posted in Plane Geometry

• A square T beam is a structural shape used in construction.

### area of a Square T Beam formula

$$\large{ A = w\;s + h\;t }$$

Where:

$$\large{ A }$$ = area

$$\large{ h }$$ = height

$$\large{ t }$$ = thickness

$$\large{ s }$$ = width

$$\large{ w }$$ = width

### Distance from Centroid of a Square T Beam formula

$$\large{ C_x = 0 }$$

$$\large{ C_y = \frac { l^2\;t \;+\; s^2 \; \left( w \;-\; t \right) } { 2\; \left( w\;s \;+\; h\;t \right) } }$$

Where:

$$\large{ C }$$ = distance from centroid

$$\large{ A }$$ = area

$$\large{ h }$$ = height

$$\large{ l }$$ = height

$$\large{ t }$$ = thickness

$$\large{ s }$$ = width

$$\large{ w }$$ = width

### Elastic section Modulus of a Square T Beam formula

$$\large{ S_{x} = \frac { I_{x} } { C_{y} } }$$

$$\large{ S_{y} = \frac { I_{y} } { C_{x} } }$$

Where:

$$\large{ S }$$ = elastic section modulus

$$\large{ C }$$ = distance from centroid

$$\large{ I }$$ = moment of inertia

### Perimeter of a Square T Beam formula

$$\large{ P = 2\; \left( w + h + s \right) }$$

Where:

$$\large{ P }$$ = perimeter

$$\large{ h }$$ = height

$$\large{ s }$$ = width

$$\large{ w }$$ = width

### Polar Moment of Inertia of a Square T Beam formula

$$\large{ J_{z} = I_{x} + I_{y} }$$

$$\large{ J_{z1} = I_{x1} + I_{y1} }$$

Where:

$$\large{ J }$$ = torsional constant

$$\large{ I }$$ = moment of inertia

### Radius of Gyration of a Square T Beam formula

$$\large{ k_{x} = \sqrt { \frac { I_{x} } { A } } }$$

$$\large{ k_{y} = \sqrt { \frac { I_{y} } { A } } }$$

$$\large{ k_{z} = \sqrt { k_{x}{^2} + k_{y}{^2} } }$$

$$\large{ k_{x1} = \sqrt { \frac { I_{x1} } { A } } }$$

$$\large{ k_{y1} = \sqrt { \frac { I_{y1} } { A } } }$$

$$\large{ k_{z1} = \sqrt { k_{x1}{^2} + k_{y1}{^2} } }$$

Where:

$$\large{ k }$$ = radius of gyration

$$\large{ A }$$ = area

$$\large{ I }$$ = moment of inertia

### Second Moment of Area of a Square T Beam formula

$$\large{ I_{x} = \frac { t \left( w - C_y \right)^3 + w \left[ w - \left( w - C_y \right) \right]^3 - \left( w - t \right) \left[ w - \left( w - C_y \right) -t \right]^3 } {3} }$$

$$\large{ I_{x} = \frac { h\;t^3 } {24} + \frac { w^3\; s } {24} }$$

$$\large{ I_{x1} = I_{x} + A \;C_{y} }$$

$$\large{ I_{y1} = I_{y} + A\; C_{x} }$$

Where:

$$\large{ I }$$ = moment of inertia

$$\large{ A }$$ = area

$$\large{ C }$$ = distance from centroid

$$\large{ h }$$ = height

$$\large{ t }$$ = thickness

$$\large{ s }$$ = width

$$\large{ w }$$ = width

### Torsional Constant of a Square T Beam formula

$$\large{ J = \frac { w\;s^3 \;+\; l \;-\; \left( \frac {s}{2} \right) t^3 } {3} }$$

Where:

$$\large{ J }$$ = torsional constant

$$\large{ l }$$ = height

$$\large{ t }$$ = thickness

$$\large{ s }$$ = width

$$\large{ w }$$ = width