### Discussion :: Theory of Structures - Section 1 (Q.No.2)

Aman said: (Nov 20, 2013) | |

What is mean by shape factor? |

Amrit Singh said: (Mar 14, 2014) | |

Shape factor is the ratio of plastic moment and elastic moment. |

Pritpal said: (May 31, 2014) | |

What is plastic and elastic moment? |

Ariki said: (Jul 10, 2014) | |

Shape factor triangular? |

Vijay said: (Sep 14, 2014) | |

Shape factor is ratio the of plastic section modulus(Zp) or section modulus( Ze) Zp = A/2(y1+y2). Ze = I/y. |

Emmanuel said: (Aug 29, 2015) | |

Section modulus of rolled member as he said. |

James Lakshmann Cpt said: (Oct 30, 2015) | |

Shape factor is ratio between plastic and section modulus. |

Asaithambi said: (Sep 21, 2016) | |

What is the shape factor for a rectangular and a circular sections? |

Shuvanjan Dahal said: (Dec 22, 2016) | |

Shape factor is the ratio of elastic to plastic moment capacity. Also, it is the ratio of elastic section modulus to plastic section modulus. |

Allen said: (Dec 25, 2016) | |

Can show some exact formula to solve this? |

M@hesh said: (Jan 5, 2017) | |

Shape factor is the ratio of plastic moment to yield moment of a given section. It gives the reserve strength of the section after yielding. Plastic moment is the capacity of any section derived using the plastic analysis i.e. assuming that the whole section have yielded and plastic state is reached. Yield moment the capacity of the section assuming that only the outermost fiber is yielded. |

Gajan Rana said: (Feb 2, 2017) | |

@Asaithambi. Shape factor for Rectangular section = 1.5 & Circular section = 1.7. |

Asaithambi said: (Feb 9, 2017) | |

Shape factor for square section = 1.5, Rectangular section = 1.5. I-section = 1.12 to 1.2. Tube = 1.27. Triangle = 2.346. |

Dany Meena said: (Feb 28, 2017) | |

Diamond section - 2. T section : 1.90 - 1.95. |

Manikandan said: (Mar 18, 2017) | |

For rectangular 1.5. |

Har said: (Aug 30, 2017) | |

Plastic analysis, the shape factor for rectangular section, is 1.5. |

Vaibhav said: (Nov 15, 2017) | |

What is y1 and y2 and how to determine them? |

SURAJ GIRI said: (Mar 11, 2018) | |

Shape factor for square section = 1.5, Rectangular section = 1.5. I-section = 1.12 to 1.2. Tube = 1.27. Triangle = 2.346. Diamond-section - 2. T section : 1.90 - 1.95. |

Dileep said: (May 19, 2018) | |

What is y1 and y2 and how to find out them? |

Sanket Sangale said: (Jun 16, 2018) | |

I-section. - 1.14. Rectangle & square. - 1.5. Circular. - 1.7. Diamond - 2.0. Triangular - 2.34. |

Deepak Baswal said: (Sep 15, 2018) | |

The shape factor of the standard rolled beam section varies from 1.10 to 1.20. 1 section is in rolled section and other circular rectangular etc are not in a rolled steel section. |

MKS said: (Mar 5, 2019) | |

The ratio of the plastic moment to the yield moment is known as the shape factor. For a rectangular section the plastic moment Mp is about 1.5 times greater than the elastic moment capacity. For an I-section the value of the shape factor is about 1.12. |

Sunny Kumar said: (Mar 23, 2020) | |

Rectangle/ square - 1.5 Triangle with vertex upward -2.34 (best section) Triangle with vertex horizontal - 2 Solid circular section - 1.7 Thing ring - 1.27 Diamond section (Rhombus) - 2 Thin hollow Rhombus - 1.5 I section ( about strong axis) - 1.12 to 1.15 I section ( about week axis ) - 1.55 T- section - 1.9 to 1.95 |

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