Other than a project or two where I looked at vibration from machinery, I never worried too much about vibration in floor / floor framing design. Typically, I never had to. Manufacturers of floor joists (e.g., prefabricated wood I-joists) worry …
was called once to a movie set. It was in an old house, out in the country. There was considerable `bounce’ in the upper story floor, and they wondered if it was `safe’ (… to do their filming). I did …
E min (c) Jeff R. Filler, Pell City, Alabama, 2022 But First, E apparent and E true `E min’ is calculated wood property used in the design of structural wood members (beams, columns, etc.). It is a derived property, derived …
… now for `deflection’ … So far we’ve been dodging the `deflection’ issue. `Deflection’ of a beam, rafter, girder, header … is how much the beam `bows’, or bends. For a beam or rafter supported at it’s ends, the deflection …