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 2x6 16OC is only rated. for 30 live floor load to about 11'2. A 20 foot span 16. OC need at least. a 2x10 for a 30 pound live load. For a 20 lb live load, limited storage with SYP joists 16. OC is good to. about 14.5 feet of span. This calculation includes the weight of a drywall. ceiling under the joists. 20 foot span 16. OC need at least. a 2x10 for a 30 pound live load. For a 20 lb live load, limited storage with SYP joists 16. OC is good to. about 14.5 feet of span.