RAM Structural System Help

Load Combinations

The load combinations required by the specified Building Code or Standard are generated automatically by the program. The user can have the program generate the combinations specified by the AISC Specifications, or the more detailed combinations specified by ASCE 7, IBC, BOCA, SBC, UBC, Eurocode, CAN/CSA S16-01, S16-09 S16-14, AS/NZS 1170, BS 5950, and IS 800-07. See the Load Combination Generator manual for more information.

In generated combinations, the load factors are "normalized" so that all combinations are compared against an allowable interaction equation value of 1.00 (this only affects some earlier implementations of ASD where a one-third stress increase was allowed – rather than using an allowable interaction equation value of 1.33, the relevant combinations are multiplied by 0.75).

Dynamic and "Other" load cases are not included in the generated combinations but can by used in combinations created by the user. The user can create any number of additional load combinations.

When creating user-specified load combinations, the plus and minus combinations should both be explicitly created. The load factors should be "normalized" as explained above.

Refer to the appropriate design code in "Member Code Check" for more information on each code’s specific load combination requirements.