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I'll try to find the web-page where I found the drawings. Otherwise, it might be possible to modell them out of physical example as they are quite straight-forward design devoid of anny excessive 3-D structures.
Drawings I saw where 2D outlines but they can be usable as outline for extrude feature. After that, you could just use CSG to cut out the H-beam pattern and chamfer/fillet to model the round parts around big-end.
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Thank you for your time,
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