The rolled steel I – sections are most commonly used as beams because these provide?

By Raj Vimal|Updated : October 14th, 2022

(A) Only 1

(B) Only 2

(C) 1 and 2

(D) None of these

The rolled steel I – sections are most commonly used as beams because these provide large moment of inertia with a less cross-sectional area and greater lateral stability. It means answer is C. 

Explanation:

I Section is the best cross-section for a beam because it provides higher moment of inertia about the x-x axis while having a smaller cross-sectional area.

I-sections offer better lateral stability than other sections because they have a higher section modulus than any other type of section.

 

About Rolled steel I - Sections

Rolling mill-produced rolled steel sections that are employed as structural elements are referred to as rolled steel sections. The names of rolled steel section types are determined by the cross sectional forms of the sections. The kind of members that make up the sections and, to some extent, the manner of erection influence the shapes of the sections that are chosen. Here are a few more points about Rolled Steel I section.

  • The market has many steel parts that are easily accessible and frequently in demand.
  • These steel pieces are referred to as ordinary steel pieces. Rarely used steel sections include some. These are referred to as special sections and are created upon special request.
  • The nominal dimensions, weight, and geometrical characteristics of various rolled steel sections are provided in the "ISI reference for Structural Engineers" publication.
  • Sectional steel is used in construction to create a variety of products, including sectional steel doors, windows, frames, etc.

Because they offer a significant moment of inertia with a smaller cross-sectional area and improved lateral stability, rolled steel I-sections are the most frequently utilized as beams.

Summary:

The rolled steel I – sections are most commonly used as beams because these provide? (1) large moment of inertia with a less cross-sectional area (2) Greater lateral stability 

Because they offer a significant moment of inertia with a smaller cross-sectional area and improved lateral stability, rolled steel I - sections are most frequently utilized as beams.

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