Structural steel sections
why I-sections are commonly used.
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Member • Mar 24, 2011
its not that the other sections like channel section or angle section are not used. They are much less likely to bend or warp. it also has a better buckling resistance in both the x and y directions when compared to the other sections. this makes it more easy to use. but even the other sections are used by combinations. for example 2 channel sections can be placed back to back or toe to toe and bolted with the necessary arrangements.Are you sure? This action cannot be undone. -
Member • Mar 25, 2011
i think i have found the answer of my question. the i sections are commonly use because the web of i section resists shear force and the flanges resist bending momentAre you sure? This action cannot be undone. -
Member • Mar 9, 2013
the flenges can resist shear force and web bending moment , if external loading is about minor axis....... it's just that I-sections have high section modulus along major axis , and sufficient sec. mod. along minor axis , hence are preffered over channel, angle sections. Though tubulur sections (best for torsion) have high sec. mod. along both major and minor axis , but have lesser strength (as they are hollow) as compared to I-sections, henced are only used mainly for small loads and aesthetic purposes.Are you sure? This action cannot be undone. -
Member • Jul 2, 2013
i think it also deals with wind load. the placement of i section. flange faces the wind... and gives resistance..Are you sure? This action cannot be undone. -
Member • Jul 20, 2013
Hi,@n@ndi think it also deals with wind load. the placement of i section. flange faces the wind... and gives resistance..
I list out some of the reasons.
- In "I" sections we can connect the beam from 4 sides.
- If the connection is fixed, mostly probably we connect the beam in flange side.
- From the least least length and thickness, we get the sufficient section modulus. So the weight is reduced
- In the connection, bolt tigtening can be done easily, compared to CHSS, SHSS etc.
- Moment of inertia is less compare with other members. So the buckling in column is reduces. (pi2*E*I/le2)
- ........ so on
Are you sure? This action cannot be undone.