Bolt Connection Design for Cold Formed Steel

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  Combined Shear and Tension

ASD:
           (O_t . f_t) / F_nt + (O_v . f_v) / F_nv <= 1.3       Eq. E3.4-2

LRFD;
           f_t / (f_t. F_nt) + f_v / (f_v. F_nv) <= 1.3           Eq. E3.4-3

      O_t = 2.25 for A307, 2.0 for other bolts
      O_v = 2.4

      f_t = 0.75
      f_v = 0.65

     f_v - Required shear stress
     f_t - Required tension stress
     F_nv - Nominal shear stress
     F_nt - Nominal tension stress

  Minimum edge distance
    e >= 1.5 d

  Minimum spacing of bolts
    s >= 3 d

Connection Strength T_r = kips V_r = kips

CF Steel F_u = ksi t = in. e = in. F_y = ksi

bolt Grade in. d= Bolt Information m_f=

Type of Bearing Connection	m_f
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