The opposite of sagging moment. Different sign conventions are used by engineers, so the terms positive and negative moments can be confusing. For a beam with fixed ends, sagging moment occurs at midspan and hogging moment occurs at the ends.
Consider a really big ship riding at the waves. If the ship is supported by two waves at bow and stern, it sags in the middle. If the ship is suppoerted on a wave in the middle, it is called a hog, with both ends bending downward.
Merriam-Webster defines it. Used as a verb it means: to cause to arch. So for a continuous 3 bay/span beam, the arching at interior supports is "hogging".
as a previous poster says, hogging is the opposite of sagging. a sagging moment is possibly more apparent to visual ... a sagging moment causes the middel of the beam to sag, tension in the lower surface and compression in the upper surface. a hogging moment does the opposite, tension in the upper surface and compression in the lower surface.
