For a building of this size, the fixed or open the door costs of a tilt-up construction project (like the rental of a large crane, for example) make it more expensive than steel, even though concrete is usually a less expensive raw material.he fact that builders in earthquake-prone California now use tilt-up construction for 90% of their single-story commercial projects indicates that concrete buildings are cost-competitive and extremely durable. The intended use for a building will also influence whether steel or concrete is the best choice.
Castor is a bright star in the constellation Gemini that, along with Pollux, is one of the two main guideposts for the asterism that is sometimes nicknamed The Twins.. At magnitude 1.58, Castor is the 20th brightest star in Earth's night sky.
Castor seed is the source of castor oil, which has a wide variety of uses. The seeds contain between 40% and 60% oil that is rich in triglycerides, mainly ricinolein. The seed also contains ricin, a water-soluble toxin, which is also present in lower concentrations throughout the plant.