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I am confusing about results in modelling one-way slab

Hello

I am really confused about results i got for moments about local x and y axes, i modeled one way slab with a ratio equal to 3 (slab length is 9 and slab width is 3), the slab is resting on four edge beams,i subjected 5 kN/m2 on plates using plate load then i run the analyze,, the confusing things  i am getting bigger moment  for My than Mx.

as i know the Mx does not mean moment about the plate local x axis.  It actually means moment on the X face, where the x face is the edge that the local x axis "pokes out of".  It turns out that Mx is actually the moment ABOUT the plate local y axis,

I tried to use floor load option for one way load distribution i got same thing My larger than Mx

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