Effective Length Factor Calculator

Category	Engineering ↺
Engineering	Civil ↺
Civil	Building and Structures ↺
Building-And-Structures	Allowable Stress Design for Building Columns ↺

✖Effective length is the total length of the section. It is the length of a section which is effectively restrained. ⓘ Effective length [l]			+10% -10%
✖Actual unbraced length is the distance between ends of a structural member (such as a column) which are prevented from moving normal to the axis of the member, by bracing, by floor slabs, etc.ⓘ Actual unbraced length [l']			+10% -10%

✖Effective length factor is defined as the factor used for the members in the frame. It depends on the ratio of compression member stiffness to the end restraint stiffness. ⓘ Effective Length Factor [k]

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Effective Length Factor

Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has created this Calculator and 100+ more calculators!

Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

Ishita Goyal has verified this Calculator and 500+ more calculators!

< 2 Other formulas that you can solve using the same Inputs

Allowable Compressive Stress when Slenderness Ratio is Less than Cc

Allowable compressive stress=(Yield stress of steel/Safety factor)*(1-(((effective length factor*Effective length)/Radius of gyration )^2)/(2*Slenderness ratio for separation^2)) GO

Slenderness Parameter

Slenderness parameter=(effective length factor*Effective length/Radius of gyration *pi)*sqrt(Specified minimum yield stress/Modulus Of Elasticity) GO

Effective Length Factor Formula

effective length factor=Effective length/Actual unbraced length
k=l/l'

More formulas

Slenderness Ratio Used for Separation GO

Allowable Compressive Stress when Slenderness Ratio is Less than Cc GO

Safety Factor for Allowable Compressive Stress GO

Allowable Compressive Stress when Slenderness Ration is Greater than Cc GO

What and why is effective length factor used?

The concept of the effective length factors of columns has been well established and widely used by practicing engineers and plays an important role in compression member design. The effective length factor for braced columns varies from 0.5 to 1.0, whereas for unbraced columns, it can vary from 1 to infinity.

How to Calculate Effective Length Factor?

Effective Length Factor calculator uses effective length factor=Effective length/Actual unbraced length to calculate the effective length factor, The Effective Length Factor formula is defined as the ratio of effective length of column to actual unbraced length. . effective length factor and is denoted by k symbol.

How to calculate Effective Length Factor using this online calculator? To use this online calculator for Effective Length Factor, enter Effective length (l) and Actual unbraced length (l') and hit the calculate button. Here is how the Effective Length Factor calculation can be explained with given input values -> 0.4 = 0.508000000002032/1.27000000000508.

FAQ

What is Effective Length Factor?

The Effective Length Factor formula is defined as the ratio of effective length of column to actual unbraced length. and is represented as k=l/l' or effective length factor=Effective length/Actual unbraced length. Effective length is the total length of the section. It is the length of a section which is effectively restrained. and Actual unbraced length is the distance between ends of a structural member (such as a column) which are prevented from moving normal to the axis of the member, by bracing, by floor slabs, etc.

How to calculate Effective Length Factor?

The Effective Length Factor formula is defined as the ratio of effective length of column to actual unbraced length. is calculated using effective length factor=Effective length/Actual unbraced length. To calculate Effective Length Factor, you need Effective length (l) and Actual unbraced length (l'). With our tool, you need to enter the respective value for Effective length and Actual unbraced length and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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