The conductors entering the transformer cabinet at the lower right are the SECONDARY LOAD.Buildings may also be subjected to additional (secondary) loads that may occur due to the environments in which they are constructed. These loads may not always occur and engineers consider their impact on a structure after they have addressed the primary loads. SNOW LOADS,SHRINKAGE LOADS,THERMAL LOADS,SETTLEMENT LOADS, DYNAMIC LOADS & SEISMIC LOADS ARE SECONDARY LOADS