September 6, 1901. President William McKinley is shot at the Pan American Exposition in Buffalo, NY. Anarchist Leon Czolgosz is arrested in connection with the attack. September 14, 1901. McKinley dies of complications from his bullet wounds. Vice President Theodore Roosevelt assumes the presidency.
Concrete slab. A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
A flat, reinforced-concrete structural member, relatively sizable in length and width, but shallow in depth; used for floors, roofs, and bridge decks. Concrete slab. A shallow, reinforced-concrete structural member that is very wide compared with depth. Spanning between beams, girders, or columns, slabs are used for floors, roofs, and bridge decks. If they are cast integrally with beams or girders, they may be considered the top flange of those members and act with them as a T beam. See Concrete, Concrete beam.