Dear Officer:
I have one question regarding the results in RAM:
In RAM, we can check the option shown below to ask RAM to show the failure part in the RC slab based on the given rebar.
When I checked the results, I saw the results show envelopes (Max and Min) of each response (moment, shear etc). And it shows six envelopes there. But I only defined one load combo (as shown below). May I ask:
1. what are those six envelope in the screenshot below refer to?
2. if I want to close the load patterns, may I ask I just put 0 to all on-pattern and off-pattern factors? Or if there is a place to quickly turn off the load pattern?
3. I had a look at the moment diagram in a design strip, the corresponding maximum at this location is 68.8 k-ft, this value is not shown up in any of the envelopes (all 6), The six envelopes give me either 71.34 or 66.17, but not exactly 68.8 k-ft. May I ask what might be the reason for this?
Thank you very much for your help.