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Steel Structure Design

Q1: For determination of allowable stress in axial compression, Indian Standard Institution has adopted

A Euler's formula

B Rankine formula

C Engesser formula

D Secant formula

E Perry Robertson formula.

ANS:D - Secant formula

1. Secant formula was used in an earlier version of IS:800 prior to 1984. 2. IS:800-1984 recommended Merchant-Rankine formula. 3. IS:800-2007 recommends the Perry Roberston formula (see clause 7.1.2.1, pg no-34 of IS:800-2007).



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