Blocks that require support can be placed on shelves

Does not include gravity affected blocks besides snow layers. Includes torches, lanterns, sea pickles, redstone dust, repeaters, comparators, redstone torches, levers, buttons, ladders, all types of rails, spore blossoms, cactus flowers, soul torches, carpets, moss carpets, pale moss carpets, pale hanging moss, vines, twisting vines, weeping vines, soul torches and lanterns, fire(on crimson and warped shelves), hanging signs (placed below shelves), scaffolding, leaf litter, etc.