The systemic circulation is the portion of the circulatory system is the network of veins, arteries and blood vessels that transports blood from heart, services the body's cells and then re-enters the heart, the Mayo Clinic noted. [Image Gallery: The BioDigital Human]
A southern pine (2) 2x12 beam can span 8 feet when supporting joists spanning a maximum of 14 feet, and it can cantilever 2 feet beyond the posts on each side. With the allowable cantilever of the joists, this beam would support a deck 12 feet by 17 1/2 feet.
A better solution when 2x10 and larger lumber is used to frame the deck, is to lag bolt one or two 2x4's to the underside of the deck. These 2x4 cleats should be as 6 longer than the stairs are wide and set flush with the outside face of the rim joist. In effect, the cleats serve to make the rim joist wider.