How did you combine the primary load cases? As Load Combination or Repeat Loads? If compression only springs are used, the loads must be combined using the Repeat Load command. More details can be found here: communities.bentley.com/.../3441.member-tension-and-combination-load-cases-tn
If you are still getting tension in the support even with Repeat Loads, please attach your model here.
If you are still getting tension in the support even with Repeat Loads, please attach your model here.