Right now, if you run a beam and find that there is a bearing failure and go back and change your supports, then the loading shifts based on the (new support width - old support width) measurement. This drags loads away from where they actually occur (for instance posting from above) so you have to go and change all of the locations. If you then find that bearing continues to fail under the new support width (since it now has a longer out-out length and carries more load) you'd need to rinse and repeat. It is very inefficient.
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