angle design for flexure per aisc asd 9

huangyhg

angle design for flexure per aisc asd 9
question about angle design per aisc 9:
5.1.1 talks about tip of the angle in compression.  does this mean the the vertical leg points up?  or can that also mean the leg in compression is laying flat and the vertical leg in tension.  in this case the tip of the angle leg is also in compression.
  also, does anyone know of any design examples using this section?
thanks
it is for the vertical leg pointing up (as long as it is positive bending).  the vertical leg would be down for negative bending.
tip of angle in compression
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the case where one whole leg is a tension flange and the tip of the other leg has the highest compression.

it refers to it as if it is a standard gravity beam and the neutral axis is horizontal. you then have a vertical leg that sticks up (or down) and this is the leg that they refer to.
depending on the loading and the lateral bracing of the angle it is possible for either or both tips of the angle to be subjected to compression. the stress limits of 5.1.1 are to prevent local buckling of the "compression" leg(s) where a leg is considered to be in compression if its tip is in compression.