Hi Andrew, thanks for the question!
We did some testing last week and found an unsupported 5-foot span of conduit held around 180-210 pounds before flexing a noticeable amount. You can see some more details in this video if you are interested.
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1" x 48" EMT weight limit is Approximately 150 lbs.
3/4" x 48" EMT limit without bend 100 lbs. easily.