The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
Combination Weights (plf) Nominal. Properties for Standard weight (STD) pipe are generally taken where available from the AISC Manual of Steel Construction, 13th Edition (CD Database), and then otherwise from the ITT Grinnell Pipe Hanger and Engineering Manual.