the presented angular reinforcement is used for stabalizing arms of a wooden shelf.
Shelf in example is used for carrying my windsurf material.
Please notice that I used the reinforcement just for supression of bending of single beams. I actually screwed 45 ° sheetmetal angles on the bottom side of the beams. Although these sheetmetal angles could be replaced by a printed part as well, I would stick to the current solution for safety reasons...and for the material as well :-)
Have fun printing.