Four Bolt Unstiffened Extended End Plate FR Moment Connection (Beam to Column Flange)

References

American Institute of Steel Construction. 2011. Design Examples V14.1. Chicago, IL:American Institute of Steel Construction. p IIB-22

Details

From the reference:

Design a four-bolt unstiffened extended end-plate FR moment connection between an ASTM A992 W18×50 beam and an ASTM A992 W14×99 column flange to transfer the following vertical shear forces and strong-axis moments:
  • VD = 7 kips and MD = 42 kip·ft
  • VL = 21 kips and ML = 126 kip·ft
Use ASTM A325-N snug-tight bolts in standard holes and 70-ksi electrodes. The plate is ASTM A36 material.
  1. Use the design procedure from AISC Steel Design Guide 4 Extended End-Plate Moment Connections. Seismic and Wind Applications (Murray and Sumner, 2003).

Refer to the figure in the reference for additional details.

Calculations

Calculations

Vu = 1.2(7) + 1.6(21) = 42 kips
Mu = 1.2(42) + 1.6(126) = 252 kip·ft

Results

Table 1. Comparison with AISC Design Example II.B-4
Parameter RAM Connection Reference Difference
Additional Calculation of H0 (in.) 19.22 19.2 < 1%
Additional Calculation of H1 (in.) 15.65 15.6 < 1%
End plate yield line mechanism, s (in.) 2.74 2.74 none
Yp (in) 139.9 140 < 1%
End plate shear yielding (kips) 145.8 146 < 1%
Available strength due to shear rupture (kips) 137.0 137 none

Input

The following data is input into the New Joint dialog:

Joint Data tab:
  • Joint = BCF
  • Beam/Section = W 18x50
  • Beam/Material = ASTM A992 Gr50
  • Column/Section = W14x99
  • Column/Material = ASTM A992 Gr50
Loads tab:
  • V2 (beam) = 42 kips
  • M33 (beam) = 252 kip·ft

Select the Smart Connections/Smart MEP Extended both ways (DG4/Seismic) connection type.

The following data is input into the Connection Pad:

Moment End Plate group:
  • Plate thickness, tp = 1 in.
  • Top flange weld type = fillet
  • Bottom flange weld type = fillet
  • Bolts = 1"⌀ A325N
  • Gage (transverse center-to-center spacing), g = 4 in.
  • Vertical edge distance, Lev = 1.75 in.
  • Horizontal edge distance, Leh = 1.75 in.
  • Distance from first interior bolt centerline to the beam flange, pfi = 1.5 in.
  • distance from the outer bolt centerline to the beam flange, pfo = 1.5 in.