Trac-systems are slightly different in that they are a bit of a hybrid. They have characteristics of both an engineered structure and a typical frame tent. Where you suspend the load will be similar to that of an engineered structure, but the load itself tends to be less. These loads can be from 50 to 100 pounds at each location.
Tension pole structures have a different characteristic all together. When suspending the concentrated load independently from each pole, you create an axial load. So long as the connection point maintains the proper sheer and the weight is uniformly distributed, the load could be anywhere from 100 to 3,000 pounds. It is simply a measure of allowable load minus design load. When creating a truss rigidly between two of the center poles, there is a positive/negative effect. Typically the center poles are designed to move independently. By adding the truss you are creating a moment at this location. It’s similar to holding a sledgehammer close to the head with your arm extended in front of you. Now move your hand to the opposite end of the hammer—you can feel the dramatic load shift.
Remember, it is ultimately the responsibility of the tent installer to contact the manufacturer and get the proper information on engineering to ensure the safest installation possible.
