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.
As with the joist size, the building code for your structure will stipulate the proper spacing between floor joists. The code itself is determined by the engineering requirements of a particular building. Normally, floor joists are spaced 16 inches apart on center. This means from the center of one upright joist to the center of the next. Given that 2x8s are actually 1-Â¾ inches wide, it works out to be 14-Â¼ inches between each joist. With some structures, floor joists are required to be 12 or 24 inches apart on center.