--- /dev/null
+infty = 100;
+eps = 0.01;
+
+base_l = 16;
+base_h = 2;
+rib_h = 2;
+rib_w = 1.5;
+rib_space = 1.9;
+ribs = 5;
+
+// base
+base_w = ribs*rib_w + (ribs-1)*rib_space;
+translate([-base_w/2, -base_l/2, 0])
+ cube([base_w, base_l, base_h]);
+
+for (x = [0:ribs-1])
+ translate([-base_w/2 + x*(rib_w+rib_space), -base_l/2, base_h-eps])
+ cube([rib_w, base_l, rib_h + eps]);
+