D defs.my
Entry 3 senses · 2 variants Webster, 1913

Girder

/gẽrd'-ẽr/ · Gird·er · IPA /ˈɡɝdɚ/
01 n. One who girds; a satirist.
  1. 1.
    One who girds; a satirist.
02 n. One who, or that which, girds.
  1. 1.
    One who, or that which, girds.
  2. 2.
    A main beam; a stright, horizontal beam to span an opening or carry weight, such as ends of floor beams, etc.; hence, a framed or built-up member discharging the same office, technically called a compound girder. See Illusts. of Frame, and Doubleframed floor, under Double.(Arch. & Engin.) See: Frame, Double
Phrases & compounds
Bowstring girder — See under Bowstring, Box, etc.
Girder bridge — See under Bridge.
Lattice girder — a girder consisting of longitudinal bars united by diagonal crossing bars.
Half-lattice girder — a girder consisting of horizontal upper and lower bars connected by a series of diagonal bars sloping alternately in opposite directions so as to divide the space between the bars into a series of triangles.
Sandwich girder — a girder consisting of two parallel wooden beams, between which is an iron plate, the whole clamped together by iron bolts.