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.
Mark the position of each floor joist. Floor joists should run parallel to each other and be spaced evenly, at no more than 16 inches (40 cm) on center if you want the floor to be properly secure. Use a tape measure to find the position of each joist along the sill plate, and mark the position with a pencil.