A member is subjected to the loads shown in Figure 3. The loads are 30% dead load and 70% live load. K = Ky = 1.0. Use A992 steel and select a W12 shape (the lightest option). Hints: The amplification factor B₁ can be estimated as 1.0 for choosing a trial selection. Then when calculating the actual B₁, use Cm = 1.0 (transversely-loaded member). 60 k

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Types and properties of steel

Steel is an alloy of iron. It is formed by heating iron and combining carbon (0.1-1.7%) with it and minor amounts of other elements such sulfur,  chromium, manganese, nickel, etc. Thousands of steel grades have been published, registered, or regulated around the world, each with its chemical composition, and special numbering systems have been devised in various countries to classify the vast number of alloys.