Gusset Plate Tool

About

About & Disclaimer

This design software may be used to verify the resistance of lapped gusset plate connections subject to compression, typically used where diagonal bracing connects to other members. The gusset plate may be supported on one edge only (sometimes used for lightly loaded roof bracing) or on two edges, which is the common case where bracing intersects at a beam-to-column connection. The design model assumes that the unsupported end of the connection is free to displace laterally, as the bracing member buckles. The eccentricity between the two lapped plates is accounted for in the design model. The resistance of the connection is based on a yield line analysis, with the moment due to eccentricity distributed to the two plates in proportion to their stiffness.

The design model has been validated against tests and Finite Element Analysis for orthodox connections with maximum 20 mm plates, bolts in square or rectangular patterns and a bracing angle of between 20° and 70°. Full details may be found in P358, section 8.5.

Although care has been taken to ensure that the calculated resistances are correct, users should verify the output. The Steel Construction Institute and other parties associated with this software and website assume no responsibilities for errors or misuse of this software, or damage arising from use of this software
Provide Input

Select steel grade and edge support (supported on one edge or two). Provide setting out information for the gusset plate. For plates supported on two edges, dimensions measured form the intersection of beam and column centre lines are required. The sketch (accessed by the information button) provides details. Details of the bolt group must be provided in the format (columns × rows). Columns are parallel to the axis of the bracing; rows are perpendicular to the axis of the bracing. Details of the tab plate (connected to the bracing member) and the gusset plate are required–. Hovering over fields generally provides information on the allowable range; some ranges are calculated based on information already input. The software assumes M20, 8.8 bolts.
Note: Input fields that have been modified since the last calculation are designated by 'blue' right border
Related Links
Gusset Plate Connections
The Green Book
Help

Material and Edge Support

Select Steel GradeSET-OUT WATERMARK/SET-OUT WATERMARK

Modulus of Elasticity - E (kN/mm²)

Edge Support

Setting Out

Bracing Angle (degrees)

SET-OUT WATERMARK/SET-OUT WATERMARK

SET-OUT WATERMARK/SET-OUT WATERMARK SET-OUT WATERMARK/SET-OUT WATERMARK

Vertical distance from the horizontal axis to the horizontal weld (v_b)

Horizontal distance from the vertical axis to the vertical weld (h_c)

Bolt Group

Select Bolt Group

Bolt PitchSET-OUT WATERMARK/SET-OUT WATERMARK

Bolt Gauge

Tab Plate

Tab Plate thickness

Tab Plate width

Tab Plate offset

Tab Plate end distance

Gusset Plate

Gusset Plate thickness

Gusset Plate end distance

Gusset Plate length (L_plt)

Gusset Plate width

Gusset Plate dimension h_guss

Gusset Plate dimension v_guss

Output - Connection Resistance

Output - Connection Resistance You have completed input, please click Finish button below to calculate the connection resistance

Yield line pattern:

Gusset plate thickness, t_guss (mm)

L_Lap (mm)

Tab plate thickness, t_tab (mm)

h_guss (mm)

Tab plate length (mm)

v_guss (mm)

Gusset plate length (mm)

Bracing angle (degrees)

Yield lines:

h_c (mm)

In gusset plate, w_guss (mm)

v_b (mm)

In tab plate, w_tab (mm)

Gusset plate inertia, I_guss (mm⁴)

k_amp

I_Lap (mm⁴)

Gusset plate resistance, N_Rd,Guss (kN)

Tab plate inertia, I_tab (mm⁴)

Tab plate resistance, N_Rd,Tab (kN)

Moment distribution for gusset plate, µ_Guss

Bolts resistance, N_Bolt (kN)

Moment distribution for tab plate, µ_Tab

Resistance, N_Rd (kN)

e₀ (mm)


Gusset plate thickness, t_guss (mm)
Gusset plate length (mm)
L_Lap
Tab plate thickness, t_tab (mm)
Tab plate length (mm)
Yield lines:
In gusset plate, w_guss (mm)
In tab plate, w_tab (mm)
h_guss (mm)
v_guss (mm)
Bracing angle (degrees)
h_c (mm)
v_b (mm)


Gusset plate inertia, I_guss (mm⁴)		mm⁴
I_Lap (mm⁴)
Tab plate inertia, I_tab (mm⁴)
Moment distribution for gusset plate, µ_guss
Moment distribution for tab plate, µ_tab
e₀ (mm)
k_amp
Gusset plate resistance, N_Rd,Guss (kN)
Tab plate resistance, N_Rd,Tab (kN)
Bolts resistance, N_Bolt (kN)
Resistance, N_Rd (kN)