Commercial drain cleaning. When I arrived on site I talked to Denise and found both women's and mens room backing up out of floor drains. Floor drain in janitors closet backed up, and dispatchers wash room and drivers wash room where backed up. I found floor cleanout by the drinking fountains and janitor closet. I removed drain cover, cut out 4 inch abs plug, power rod main drain line and hit a problem about 20 to 30 ft out. I ran the rod back and forth until water started to move. I ran janitor closet sink, let rod run and flushed all toilets a few times. Main sewer drain is open. I can hear water running in the main. Also I cleaned up around all floor drains and flushed trap with a 5 gallon bucket to clean out any paper and waste out of floor trap. Mop up area install 4 inch gripper plug in floor clean out and reinstall cover.