simple foot for cheap storage rack

I got a cheap "muscle rack" and the metal posts themselves are the
feet. Not a great combo with laminate wood flooring...

Just a quick openscad hack to generate anti-scratching feet for the
racks. Reasonably customizable. Released public domain/CC0.

diff --git a/etc/shelving-foot.scad b/etc/shelving-foot.scad
new file mode 100644 (file)
index 0000000..8ace09a
--- /dev/null
+++ b/etc/shelving-foot.scad
@@ -0,0 +1,61 @@
+// super simple feet for metal shelving
+// Created 2017 Clinton Ebadi <clinton@unknownlamer.org>
+
+// Released under the https://wiki.creativecommons.org/wiki/CC0
+// To the extent possible under law, Clinton Ebadi has waived all
+// copyright and related or neighboring rights to super simple feet
+// for metal shelving.
+
+// Length of slot for shelving leg
+slot_length = 32;
+// Thickness of slot for shelving leg
+slot_thickness = 1.8;
+
+// Thickness of wall around slot
+wall_thickness = 3;
+
+// Depth of the base foot
+base_depth = 4;
+// Depth of the slot and walls around the length
+slot_depth = 20;
+// Offset for leg slot into the base
+slot_offset = -1;
+
+$fs = 0.1;
+
+foot ();
+
+module base () {
+    side = slot_length + slot_thickness/2;
+    offset (r = wall_thickness) polygon ([ [0, 0], [ side , 0], [0, side] ]);
+}
+
+module walls () {
+     intersection () {
+         offset (r = wall_thickness) {
+              square ([slot_thickness, slot_length + slot_thickness/2]);
+              square ([slot_length + slot_thickness/2, slot_thickness]);
+         }
+         base ();
+     }
+}
+
+module slot () {
+     square ([slot_thickness, slot_length]);
+     square ([slot_length, slot_thickness]);
+
+     // tiny chamfer around bend
+     x = 2;
+     polygon ([ [0, 0], [ slot_thickness*2+x/2, 0], [0, slot_thickness*2+x/2] ]);
+}
+
+
+module foot () {
+     difference () {
+         union () {
+              linear_extrude (base_depth) base ();
+              translate ([0, 0, base_depth+slot_offset]) linear_extrude (slot_depth+slot_offset) walls ();
+         }
+         translate ([0, 0, base_depth+slot_offset]) linear_extrude (slot_depth+slot_offset+0.1) slot ();
+     }
+}