Clevis Joint Check (Eurocode 3)

Perform a quick and complete clevis joint check following Eurocode 3.

Input values

kN
kN

Geometry

mm
mm

Middle plate

mm

Outer plate

mm

Material

N/mm²
N/mm²
N/mm²
N/mm²
N/mm²

Default values

Sizing

½FEd½FEdFEdtOtMgd
cOd0,OaOROouter platescMd0,MaMRMmiddle plate

Pin

d = 10 mm

g = 5 mm

fy = 355 N/mm²

fu = 460 N/mm²

Middle Plate

tM = 10 mm

d0,M = 12 mm

cM = 10 mm

aM = 10 mm

RM = 16 mm

fy = 235 N/mm²

Outer Plate

tO = 10 mm

d0,O = 12 mm

cO = 10 mm

aO = 10 mm

RO = 16 mm

fy = 235 N/mm²

Results

Ultimate Limit State (ULS)

CheckItemValueLimitUnitUnity Check
ShearPin5-kN-
BendingPin62.5-kNm-
Shear and bendingPin-
BearingMiddle Plate10-kN-
BearingOuter plate5-kN-
aMMiddle Plate10-mm-
cMMiddle Plate10-mm-
aOOuter plate10-mm-
cOOuter plate10-mm-

Serviceability Limit State (SLS)

CheckItemValueLimitUnitUnity Check
BendingPin31.25-kNm-
BearingMiddle Plate5-kN-
BearingOuter plate2.5-kN-
Contact stressMiddle Plate27.08-N/mm²-
Contact stressOuter plate19.15-N/mm²-

Parameters explained

Parameter nameSymbolUnitInfo text
Design ultimate loadFEdkNThe total design axial load applied to the clevis joint for Ultimate Limit State (ULS) checks.
Design serviceability loadFEd,serkNThe design axial load applied to the clevis joint for Serviceability Limit State (SLS) checks, used to prevent excessive deformation or hole ovalization.
Replaceable pinChoice-Indicates if the pin is designed to be replaceable. If so, then SLS checks are also performed.
Pin diameterdmmThe nominal diameter of the cylindrical pin that connects the plates.
GapgmmThe spacing or gap between a middle plate (tongue) and an outer plate (clevis arm). This dimension significantly influences the bending moment in the pin.
Pin yield stressfy,pN/mm²Yield strength of the material from which the pin is made.
Pin ultimate tensile stressfu,pN/mm²Ultimate tensile strength of the pin material.
Plate yield stressfy,M,
fy,O
N/mm²Yield strength of the material for the middle (M) plate (tongue) and outer (O) plates (clevis arms).
Plate hole diameterd0,M,
d0,O
mmDiameter of the pin hole in the middle (M) and outer (O) plates. Typically slightly larger than the pin diameter 'd'.
Plate thicknesstM,
tO
mmThickness of the middle (M) plate and outer (O) plates.
Plate side lengthcM,
cO
mmDistance from the edge of the pin hole to the side edge of the middle (M) and outer (O) plates (perpendicular to force direction).
Plate front lengthaM,
aO
mmDistance from the edge of the pin hole to the front edge of the middle (M) and outer (O) plates (in line with force direction).
Plate end radiusRM,
RO
mmRadius of the profiled end of the middle (M) and outer (O) plates. Important for preventing certain failure modes.
Partial safety factor (yielding)γM0-Partial safety factor for resistance of cross-sections (e.g., pin bending). Typically 1.0 or 1.1 for steel structures as per Eurocode.
Partial safety factor (connections)γM2-Partial safety factor for resistance of connections, including pins (shear, bearing). Typically 1.25 as per Eurocode.
Partial safety factor (serviceability)γM6,ser-Partial safety factor used for serviceability limit state checks of pins, often related to bearing for replaceable pins. Typically 1.0 as per Eurocode.
Young's modulusEN/mm²Modulus of elasticity for the steel material (e.g., 210,000 N/mm² for steel).
Unity checkUC-The ratio of the calculated design value to the design limit. A value less than or equal to 1.0 indicates that the weld design is acceptable under the given loads.
Shear checkVerifies pin against shear failure. Compares design shear force (Fv,Ed) to shear resistance (Fv,Rd). Fv,Rd considers single or double shear planes and pin's ultimate strength (fu,p).
Bending checkVerifies pin against bending failure. Compares design bending moment (MEd), influenced by gap 'g', to bending resistance (MRd) based on pin's yield strength (fy,p).
Bearing checkVerifies the plates and/or pin against bearing failure/stress at the pin hole, comparing applied force/stress to bearing resistance.
Plate geometry checkChecks if the provided front edge distance or side edge distance for the plate meets minimum Eurocode geometry requirements.
Contact stress check (SLS)Verifies contact stress between the pin and the plate under serviceability loads against allowable limits.

Is this tool helpful?