6 month old won't sleep in crib

We have had a lot of success at getting our son to sleep in his crib but as soon as he turned 6 months he immediately wakes up screaming if put down in his crib. Other than safety reasons for him, I don't want him in bed with me because I have him all day and my back, arms and even abs are completely exhausted from holding him so I'd like at least the nighttime to be baby free. Has anyone else gone through this and is there any tips? His crib is in the room with us and the crying it out method has never worked, he somehow manages to scream louder and will never put himself to sleep + my husband works 16hr days so it's not practical.