Not exactly the answer you were looking for, but interesting nonetheless. From Guinness Book of World Records:
"The most accumulative weight bench pressed in one hour is 305,300 lb (138,480 kg). The record was set by Eamonn Keane (Ireland) at World Gym, Marina del Ray, California, USA on July 22, 2003.
He did 1,280 reps with 200 lbs and 493 reps with 100 lbs."
[sarcasm] Obviously the volume is a little higher than some of the authors on this site would recommend, but he did it in under an hour, so he's probably ok![/sarcasm]