This section provides information on the default load combinations (technically, loading combinations) that RAM Concept creates when you start a new ACI 318-11 file. The purpose and origin of each load combination are given. You can remove or modify any of these load combinations. You can also add load combinations. The load combinations are from ACI 318-11 /ASCE 7-10 unless noted otherwise.

RAM Concept uses loading types to determine the appropriate factors in some load combinations. The factor on "L" in ACI 318-11 equations (9-3), (9-4), and (9-5) will be equal to 0.5 for Live (Reducible) Loading, 1.0 for Live (Unreducible) Loading, 1.0 for Live (Storage) Loading, and 1.0 for Live (Parking) Loading.

For the default Load History specification, RAM Concept uses the "Service LC: D + L" combination for the maximum load case. This load combination does not contain any roof loads. For floors that contain roof loads, a more appropriate load combination will need to be specified for the maximum load history step.