The Drying Rack is a block added by Tinkers' Construct. It must be placed on the side of another block, like a shelf of sorts.
The Drying Rack is used to "dry" meats. Right-clicking the rack with an item in hand will put the item on the Drying Rack. Right-clicking the Drying Rack again will remove that item.
If meat is placed on a Drying Rack, after 6,000 ticks (300 seconds or 5 minutes), that meat will be "dried" to produce the jerky version of the meat. This is a way to bypass fuel requirements, and for Rotten Flesh and Raw Chicken a way to avoid negative effects.
Drying Rack Recipes[(editsection)(pipe-separator)(visualeditor-ca-editsource-section)]