A framed unit used to hold flats or other scenery in a vertical orientation. http://www.colby.edu/personal/j/jdervin/Other/tips.html From http://www.northern.edu/wild/th241/sc96.html : OR weighted with sandbags or stage weights. http://www.adscenery.com/?page_id=753 "Standard stanchion" built from steel square tube. The two rounds tubes in the middle of the lower section mimics an arbor, allowing pig weight to be used for ballast. See also stage brace, tip jack, and lift jack.