Review Report

Channel with Lips Channel withOUT Lips Hat Z with Lips Z withOUT Lips Double Channels(Equal Flanges) Doulbe Channels(UnEqual Flanges) Double Angles Tube Shape ksi f_y= Information with Stiffeners ? d = in. b = c = in. in. kips V_r = t = in. in. R =

  Shear Strength of C-Section Web with Holes C3.2.2

    Hole reduction factor, q_s
      1). c/t > = 54, q_s = 1.0
      2). 5 <= c/t < 54, q_s = c / (54 t)

      c = h/2 - d_h/2.83      for circcular holes
      c = h/2 - d_h/2      for non-circcular holes

    The limits for the above equation:

      d_h/h < = 0.7
      h/t < = 200
      Holes centered at the mid-depth of web
      Clear distance between holes > = 18 in.
      Non-circular holes, corner radii > = 2t
      Non-circular holes, d_h < = 2.5 in. and L_h < = 4.5 in.
      Circular holes, diameter < = 6 in.
       d_h > = 9/16 in.

      d_h - depth of hole
      h - depth of flat part of web
      t- thickness
      L_h - length of hole


  Combined Bending and Shear C3.3

  ASD
    1). For members with unreinforced webs:       { [O_b. M / M_n]² + [O_v .V / V_n]² }^0.5 < = 1.0

    2). For members with transverse web stiffeners:        0.6 [O_b. M / M_n] + [O_v .V / V_n] < = 1.3

      M - required allowable flexural strength
      V - required allowable shear strength
      M_n - Nominal flexural strength
      V_n - Nominal shear strength

      O_b - resistance factor for bending = 1.67
      O_v - resistance factor for shear = 1.6

  LRFD
    1). For members with unreinforced webs:       { [M_u / (f_b.M_n)]² + [V_u / (f_v.V_n)]² }^0.5 < = 1.0

    2). For members with transverse web stiffeners:        0.6 [M_u / (f_b.M_n)] + [V_u / (f_v.V_n)] < = 1.3

      M_u - required flexural strength
      V_u - required shear strength
      M_n - Nominal flexural strength
      V_n - Nominal shear strength

      f_b - resistance factor for bending
      f_v - resistance factor for shear