Dude - that's MANLY construction.
Bring a measuring tape. You may be able to sue if that 2x4 is not actually 2x4....
http://www.fool.com/investing/general/2014/09/18/lowes-hit-over-the-head-with-a-2x4.aspx
My grandparents home was built solid. Up in the attic you could see the real 2x4’s and 2x6’s and the planks for the floor. Not that shredded wafer plywood that disintegrates if it gets damp.