These spacers are designed to keep a rope ladder's rungs offset from a wall, facilitating easier and safer climbing or descent.

WARNING: Do not hold on to the spacers during use of the ladder, because the spacers are loose!

Notes:

• The rounded out slit is for the knot below the rung
• The spacers “wall_spacer_a” and “wall_spacer_b” are mirrored versions of each other, as each rung requires one spacer on the left and one on the right

The model accommodates:

• 25.5 mm diameter rungs
• 10 mm diameter rope
• Ropes passing through holes in the rung, with hole centers positioned 25 mm from the rung's ends

I've included the Blender file, so that the model can be modified to fit other dimensions.

Printing recommendations:

• 2.5 mm wall thickness on all sides (including top and bottom)
• 15% infill
• No support needed