PROJECT: STEEL BUILDING DESIGN CASE STUDY. SUBJECT: JOIST SELECTION (ECONOMICAL BAY STUDY) Investigate two framing options: Option I - joists span 30', Option II - joists span 36'. This bay framing study is done for joists (sheets 16-17), interior floor girders (sheets 18-22), and. interior fill beams (sheet 23-24). Comparison bays are priced out (sheet 25) to select economical bay framing.
This discovery of spontaneous âradioactivityâ (a term coined by Becquerelâs doctoral student, Marie Curie) eventually earned Becquerel a Nobel Prize for Physics in 1903, which he shared with Marie Curie and her husband Pierre Curie.enchmarks: Henri Becquerel discovers radioactivity on February 26, 1896. Credit: A photographic plate made by Henri Becquerel shows the effects of exposure to radioactivity. A metal Maltese cross, placed between the plate and radioactive uranium salt, left a clearly visible shadow on the plate.
Discovery of cosmic microwave background radiation. The accidental discovery of cosmic microwave background radiation in 1964 is a major development in modern physical cosmology. Although predicted by earlier theoretical work around 1950, it was first discovered accidentally by American radio astronomers Arno Penzias and Robert Woodrow Wilson as they experimented with the Holmdel Horn Antenna.