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[amit]

Dear Sir

A few questions -

1.     The definitions of INTERNAL ELEMENTS and OUTSIDE ELEMENTS defined in
Clause 3.7.2 are not very clear. Can these to explained further using
figures / diagrams.

2.     Refer to Note:5 of Table 3.1. If r1 is the ratio of actual average
axial compressive stress to design compressive stress of web alone and r2 is
the ratio of actual average axial compressive stress to design compressive
stress of overall section, then under what circumstances can the values of
r1 and r2 be negative as indicated in Table 3.1 for web of I-H or box
section? Please clarify.

3.     For a section consisting of 2 Is' or 2 channels placed at certain
distance centre to centre or back to back, what is the criteria to determine
whether the compound section is plastic or compact or semi-compact or
slender so that its capacity in bending in either directions can be
estimated. This will be required specifically for columns of above sections
subjected to compression and simultaneous bi-axial bending.

Regards

Amit.

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