W40x174, W21x48, W14x99, W14x90, W12x65, W10x12, W8x31, W8x10, W6x15, W6x9, W6x8.5, M4x6 (made from A992) The definition of and the values for and for the individual elements of various  p r are given in Table B4.1b on page 16.1-17. For example, Plate element Section  p r Wide-flange Flange bf/2tf 0.38 1.0 Web h/tw 3.76 5.70 Channel Flange bf/tf 0.38 1.0 Web h/tw 3.76 5.70 Square or Rect. Flange (b-3t)/t 1.12 1.40 Box Web (b-3t)/t 2.42 5.70 Note that the slenderness limits (p and r) and the definition of plate slenderness (b/t) ratio depend upon the boundary conditions for the plate. If the is supported along parallel to the direction of compression force, then two edges it is a element. For example, the webs of W shapes stiffened If the plate is supported along only parallel to the direction of the compression one edge force, then it is an element. Ex., the flanges of W shapes. unstiffened
W40x174, W21x48, W14x99, W14x90, W12x65, W10x12, W8x31, W8x10, W6x15, W6x9, W6x8.5, M4x6 (made from A992) The definition of  and the values for p and r for the individual elements of various are given in Table B4.1b on page 16.1-17. For example, Section Plate element  p r Wide-flange Flange bf/2tf 0.38 1.0 Web h/tw 3.76 5.70 Channel Flange bf/tf 0.38 1.0 Web h/tw 3.76 5.70 Square or Rect. Box Flange (b-3t)/t 1.12 1.40 Web (b-3t)/t 2.42 5.70 Note that the slenderness limits (p and r) and the definition of plate slenderness (b/t) ratio depend upon the boundary conditions for the plate. If the is supported along two edges parallel to the direction of compression force, then it is a stiffened element. For example, the webs of W shapes If the plate is supported along only one edge parallel to the direction of the compression force, then it is an unstiffened element. Ex., the flanges of W shapes.
CE470-Ch-5-Beam-Design.docx