Indian Railways — side middle berth in garib rath

Address:

Ranchi, Jharkhand, 834005

I recently bought tickets for 3ac in ranchi-new delhi garib rath and to my surprise the berth allotted was sm. Never came across this sort of berth in any other trains in india. How can you sit in day time if you have sm allocation? And i'm 6 feet tall how could i adjust in the side middle berth. I could guess it gonna be a terrible journey :- (Garib rath still continues with the side middle berth, which is a pain to travel, especially during day time