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(Econf) Third e-Conference on SEFI

 
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JMSSNL at ltecd.ltindi...
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PostPosted: Mon Jul 21, 2003 10:19 am    Post subject: (Econf) Third e-Conference on SEFI Reply with quote

Dear All,


I want to highlight a shortcoming in IS:800:1984.

In Section 5 on design of compression members code provides guidelines
for design of compound sections eg. laced (cl.5.7 ) or Battened
(cl.5.Cool. Code also provides requirements for b/b sections (cl.5.9).

In India two I sections connected in (+) formation is widely used as
Industrial building columns. One section is split and two halves are
welded on either side of Intact section. This is predominantly axial
compression member with some moment due to continuity and framing beam
eccentricity.

IS:800 do not provide guidelines for design of such sections namely

a. Welding requirement for interconnection of two members
b.  Diaphragm stiffener requirement
c. Determination of Allowable bending stress values.

Since this configuration is mostly used in India only, International
codes like AISC-ASD and BS:5950 do not have provisions for same. Draft
version of IS:800 (To be published) also do not address this issue. In
my opinion due to wide use in India provision for such sections shall be
provided in IS:800


Jignesh
L&T-S&L
Vadodara

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