Ballast is the necessary additional weight to make sure that a truss roof structure is kept in place and protected against wind forces, wind pressures, sliding or other hazards. In any roof the front, middle and rear towers require different ballast weight. The front towers normally requires much more ballast weight than the middle or rear towers. The towers of the roof structure in total needs less counter weight as the towers are all connected. The result is less ballast requirement per tower.
The ballast compression beam is made of steel, powder coated black and come in various sizes depending on the roof sizes.
The ballast compression beams can be fixed at the steel tower basements. To connect the both rear towers it is adviseable to use an aluminium truss as due to the long span, the steel ballast compression beam will face a high bending force.