Wall Hook

There are many 3d printed hooks, this one is mine. Use at least 3 walls ((4 used), I recommend cubic infill at at 15% or more (all in profile) which will print quicker than gyroid. It was designed for a specific purpose (see lightweight ladder in pic) so is quite shallow. The base is 110mm tall with hole spacing of 91mm, and the load carrying part is 110mm deep. It can be used with 4-5mm or #8-10 screws. I did some basic static analysis to balance the strength and material usage, image included.