+10 In theatres, there is a catwalk called a fly gallery that runs along the four walls above stage. Stagehands stand on the fly gallery to raise and lower scenery on and off the stage. A structural steel fitter has been asked to replace the inside safety rail of a fly galley. The stage above the stage is 106'6" long and 48'9" wide. The fly gallery is 2 1/2 wide. If the fitter uses rails that are 20 feet long, how many rails will she need
