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3D Render American Canadian GeneralIm-Export
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Bolt Connection Design for Cold Formed Steel
Review Report Modification Factor m f
Type of Bearing Connectionmf
single shear and outside sheets of double shear
connection with washers under both bolt head and nut
1.0
Single shear and outside sheets of double shear
connection without wahshers under both bolt head
and nut, or with only one washer
0.75
Inside sheet of double shear connection with or without washers 1.33
Bolt Connection Design for Cold Formed Steel


  Combined Shear and Tension 

 ASD:
           (Ot . ft) / Fnt + (Ov . fv) / Fnv <= 1.3       Eq. E3.4-2

 LRFD;
           ft / (ft. Fnt) + fv / (fv. Fnv) <= 1.3           Eq. E3.4-3

      Ot = 2.25 for A307, 2.0 for other bolts
      Ov = 2.4

      ft = 0.75
      fv = 0.65

     fv - Required shear stress
     ft - Required tension stress
     Fnv - Nominal shear stress
     Fnt - Nominal tension stress
  


  Minimum edge distance
    e >= 1.5 d

  Minimum spacing of bolts
    s >= 3 d


Connection Strength Tr = kips Vr = kips
CF Steel Fu = ksi t = in. e = in. Fy = ksi
bolt Grade in. d= Bolt Information mf=