AISC 2005 Table B4.1 Case 1
AISC 2005 Table B4.1 Case 1
(OP)
Table B4.1, Case 1 description says “Flexure in flanges of rolled I-shaped sections and channels.” For bending about the major axis, the stress distribution on the top flange (for a simply supported beam subject to gravity loads) is uniform compression.
Therefore, Case 3 should be used for the flange. This isn't the case according to AISC design examples and any steel design book.
What it should say based on its use is "Flanges of rolled I-shaped sections and channels in flexure".
Is this clarified in AISC 2010? Has anyone else noticed this poor wording?
Also, if flanges are in uniform compression for both case 1 and 3, why is the buckling criteria different? Does axial compression effect the flange differently than bending compression?
Thanks!
Therefore, Case 3 should be used for the flange. This isn't the case according to AISC design examples and any steel design book.
What it should say based on its use is "Flanges of rolled I-shaped sections and channels in flexure".
Is this clarified in AISC 2010? Has anyone else noticed this poor wording?
Also, if flanges are in uniform compression for both case 1 and 3, why is the buckling criteria different? Does axial compression effect the flange differently than bending compression?
Thanks!






RE: AISC 2005 Table B4.1 Case 1
RE: AISC 2005 Table B4.1 Case 1
I read it as Case 1 being the member is in flexure and Case 3 both flanges are in compression.
RE: AISC 2005 Table B4.1 Case 1