The Milky Way Galaxy is about 100,000 Light Years across. Each light year is about 63,241 Astronomical Units. An Astronomical unit is the average distance between the Sun and â¦ the Earth, or about 93 million miles. Based on that math we form an equation.100,000x63,241=6,324,100,000 Astronomical units Thats exactly 5.881413 Ã 1017 or 588,141,200,000,000,000 miles.he Milky Way Galaxy is about 100,000 Light Years across. Each light year is about 63,241 Astronomical Units. An Astronomical unit is the average distance between the Sun and â¦ the Earth, or about 93 million miles. Based on that math we form an equation.
The maximum distance a deck joist can span between supports is determined by the joist's dimensions and species, as well as the spacing between joists. The closer the joists are to each other, the greater the distance they're able to span safely. Two-by-twelve Douglas Fir joists spaced 12 inches apart on center, for example, can span 20 feet, 7 inches, but the same joists spaced 24 inches part can only span 14 feet, 7 inches. Cantilever.
Deck Joist Sizing and Spacing. Joists are the repeated structural members that are used to build a deck frame. The minimum size joist to be used in deck construction is not a stand-alone consideration, and is related to the number of footings and beams that will be installed. In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet.