Blueprint Hanging Clamps that clamp and hold blueprints, or any large document, are key to keeping sets of drawings organized and readily available for reference. Hanging Clamps have also been known to be called "Drawing Sticks", "Plan Clamps", or "Plan Sticks" by those that work in the AEC (Architectural, Engineering, Construction) Industry. Basically speaking, hanging clamps come in various sizes, which are the length of the clamp. They come in lengths of 18", 24", 30", 36", and 48" and usually they are sold in cartons of six. Meaning you buy one carton of clamps, you get six clamps. Most hanging stands (also known as blueprint racks) hold 12 clamps. This means you would buy 2 cartons which equate to 12 clamps, which 1 blueprint rack would hold. Most customers buy one blueprint rack, and two cartons of clamps.
Now, about the size of the clamps, if you have a 24"x36" drawing size or set, you would consider the 24" side of the drawings the binding or clamping side. So, you'd want to buy 24" clamps for your 24" x 36" drawings. But, many people realize that they will be hanging 24"x36" and 30"x42" drawings (both are very popular drawing sizes for construction drawings), so they buy the 30" clamps which will hold either size drawing. With the 30" , if you clamp and hang a 24"x36" drawing by its 24" side, then you have 3" of clamp overhang on each end (30 - 24 = 6") of your drawing. Hopefully this explanation makes sense. Clamps cannot be adjusted in length. You buy the hanging clamps for the size of the drawings you wish to hang.
