What does "2×4" refer when talking about food? This post repeatedly uses "2×4" when referring to food eaten on a long, multiday tour. I suspect it's a shorthand for nutritional guidelines when planning meals but it's hard to Google for. What does this refer to?


  Our route headed past Devil’s Punch Bowl and climbed into the clouds powered by the 2×4 of eggs, hashbrowns, bacon and stack of pancakes 


http://tenspeedhero.com/features/crush-the-coast/
It's the ratio of protein to carbs