20 kg to 40 kg. According to the website of fitness equipment sales, the weight of a gym gantry is more than 20 kg, and less than 40 kg. The stability and bearing capacity of the gantry are also important factors to consider when choosing the gantry. Fitness Longmen is a kind of sports equipment, which consists of two columns and a cross beam. It is usually used for various weight training and self-weight training actions such as weightlifting, pull-ups, squats, hard pulling, etc.