Before beginning to develop your ballet bar, consider who will be using the bar. Whoever it is intended for, first decide how high off the ground the bar should be. A bar too low will not stretch the legs adequately and will strain the back. However, a bar that is too high can lead to pulled and strained muscles. First experiment and measure what height is most comfortable for the user.
Once you have decided on height, purchase a solid bar, wooden or metal, that can be easily gripped. Cut the bar down to between four to eight feet long. You will also need to purchase two pieces of piping for the mounting of the bar. These will need to be the length of the height you have predetermined, taking into account the space needed for joints and fasteners.
Cut four additional pieces of piping about one foot long each for the stabilization pieces of the ballet bar.
Attach two elbow joints to the ends of the main bar with the open joint pointing down. Attach the two pieces of piping horizontally at the right height by screwing them into the elbow joints.
Attach a T-joint to the bottom of each support piece with the top of the "T" positioned side to side. Attach the one foot piping pieces to the T joints with screws. This will stabilize the ballet bar.
On the floor under the bar, add a strip of rubber, like the kind positioned under furniture legs, to lessen wear and tear on the floor.