a 3d printable double shelf holder

the shelf was made using fusion 360's topology optimization, for making the part as lightweight and with it cheaper and faster to 3d print without giving up stifness and resistance of the part, after that a lot of time was put into designing the shelf to be goodlooking and an unique part which takes advantage of 3d printing technology

the model 1:1 size holds a 15 Cm/ 5.9 inch plank and a 11.5 cm/ 4,5 inch second plank
for making the model of the board size you like you need to do "top board depth":15cm and you will get the scaled up size

printing settings i suggest (pla):
23% infill
3 perimeters
draft or skirt not necessary
printed laying "flat"
0,2mm to 0,35mm layer height
your standard draft or fast settings
SUPPORTS ARE NEEDED, i used cura 4.4 with the custom supports ad-in

this will make a pla part of about 220 grams with supports and 200 grams for abs
a 20 cm version for example will weight 2,3 times more making it 530 grams

with this kinda os settings the part in standard size will be able to support without any kind of deformation up to 12kg on the top and 7 kg on the bottom, making the shelf capable of 24kg ad 14kg

consider lowering the settings up to 12-15% infill and two perimeters if you don't want to waste material for making a part stronger than what you need, a part like that will be able to resist 7 kg without deformation

all of these results are from fusion 360 and with a safety factor of 2 to 3

i am going to make a single shelf and other similar versions of this like one with an hexagon, triangle circle, lite ("weaker and cheaper"), all rounded, low poly themes for double and single shelfs and totally new ones

if you have any advice and request you can write it in the comments

i hope you like this and other models and I hope the information I left is enough for you

have a great day and a great print