This is one of those things they teach you in boot camp and it stays with you for the rest of your life. The fireman’s lift, or, in Hebrew, Schivat Patzua (carrying the wounded) is a clever way of picking up a man who is roughly your weight and even a little heavier, and distributing his weight across your shoulders so that you are able to carry him for a considerable distance – without causing him too much discomfort.
The image below skips a step, I think, between C and D, where you push your arm between the injured person’s legs and then bending your body forward to start lifting.
Just thought you should know. Practice on one another until you get it right.