In beam design, sections are proportioned as such that _____ to achieve economy.(a) moment of inertia about principal axis parallel to the web is equal to moment of inertia about principal axis normal to the web(b) moment of inertia about principal axis parallel to the web is considerable larger than moment of inertia about principal axis normal to the web(c) moment of inertia about principal axis normal to the web is considerable larger than moment of inertia about principal axis parallel to the web(d) moment of inertia about principal axis normal to the web is considerable lesser than moment of inertia about principal axis parallel to the webThe question was posed to me in a national level competition.Question is taken from Lateral Stability of Beams in portion Design of Beams of Design of Steel Structures

In beam design, sections are proportioned as such that _____ to achiev

1.	In beam design, sections are proportioned as such that _____ to achieve economy.(a) moment of inertia about principal axis parallel to the web is equal to moment of inertia about principal axis normal to the web(b) moment of inertia about principal axis parallel to the web is considerable larger than moment of inertia about principal axis normal to the web(c) moment of inertia about principal axis normal to the web is considerable larger than moment of inertia about principal axis parallel to the web(d) moment of inertia about principal axis normal to the web is considerable lesser than moment of inertia about principal axis parallel to the webThe question was posed to me in a national level competition.Question is taken from Lateral Stability of Beams in portion Design of Beams of Design of Steel Structures
Answer» Correct choice is (C) moment of INERTIA about principal axis normal to the web is considerable larger than moment of inertia about principal axis PARALLEL to the web Explanation: In beam design, sections are PROPORTIONED as such that moment of inertia about principal axis normal to the web is considerable larger than moment of inertia about principal axis parallel to the web to achieve economy. Such sections are relatively weak in BENDING resistance.

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Which of the following are not correct regarding design of beams with openings?(a) diameter of circular opening should be restricted to 0.5D(b) for rectangular stiffened openings depth should be less than 0.7D and length less 2D(c) for rectangular unstiffened openings, depth should be less than 0.5D and length less than 1.5D(d) point load should be applied within a distance d from adjacent openingThis question was addressed to me in an interview for internship.My question is taken from Deflection & Holes in Beams in portion Design of Beams of Design of Steel Structures
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