Lifting Padeye

LIFTING PADEYE

Model data In plane load inclination

α 0deg

Padeye Force

Fpadeye 4805.8kN

Design Factors DNV - RULES FOR MARINE OPERATIONS

γc - Used for lift points*

γc 1.0

It was considered in sacs analysis

*is meant to account for severe consequences of single element failure.

Material Data Fy 35.5 kNcm2 Weld Material Data: Fwm 48.3 kN cm2

Padeye Dimensions : Padeye radius Cheek radius

Rpadeye 320mm

Rcheek1 270mm Padeye thickness Cheek thickness

tpadeye 44.5mm tcheek 44.5mm

Diameter of Hole

dhole 186mm

Weld

tw 10mm

Base Area

Abase 578.50cm2

Geometric Properties of the Section of Padeyes Area

Area 578.50cm2

Resistance modulus (Bending in Plane)

Win 12530cm3

Resistance modulus (Bending out Plane)

Wout 429cm3

Distance between center of hole and base of padeye c 340mm Factor n n is the factor that allow perform the fillet weld execution n 1.0 between the Cheek and the Padeye, and can vary

between 1.0 and 1.5.

Shackle Shackle Pin diameter

Fcable = Fpadeye 5 Fcable Fpadeye 5

Pin lenght

dpin 180mm W 250mm

Dimension

g 630mm

Fcable 2.45 103 tonnef

Wire rope Class 6x36 1 1/2 Wire rope diameter Ï•wire 225mm

Sling Force

Fpin Fpadeye γc SECTION UTILIZED

Fpin 4805.8 kN

Loads

Fx1 Fpin cos(α) Fx1 4.8 103 kN

Fy1 0.05 Fpin Fy1 240.3 kN

Fz1 0.05 Fpin Fz1 240.3 kN

Cheek Radius - Verification dcheek 2 Rpadeye n tcheek

R cheek2

Rcheek 270 mm

dcheek

2

Rcheek2

275.5 mm

Rcheek

Rcheek1

if Rcheek1 Rcheek2

Rcheek2

otherwise

Total thickness - Verification Fpin Ttotal 83.6 mm

Ttotal 0.9Fy dpin

T 4 tcheek tpadeye

Tcheck

T 222.5 mm

"OK" if T Ttotal "NOT OK" otherwise

Tcheck "OK"

Gap in the diameter of hole - Verification

fhole

(1mm) if otherwise

dpin 33mm

0.03 dpin if 0.03 dpin 6mm 6mm otherwise

fhole

5.4 mm

dholecheck

"OK" if dpin fhole dhole "NOT OK" otherwise

dholecheck "OK"

Gap in the shackles - Verification - First Verification

fshackles W Tfshackles 27.5 mm fmax 10025 W

fmax 62.5 mm

fshacklesallowable

"NOT OK" if fshackles fmax "OK" otherwise

fshacklesallowable "OK"

-Second Verification d pin finstallation

"OK" if g Rpadeye "NOT OK" otherwise

2

Ï•wire6mm

d pin

gap g

Rpadeye

2

Ï•wiregap 175 mm

finstallation "OK"

Hole radius

r hole

dhole 2

Pull out critical section

γ1 0deg

γ2 0deg

Design dimensions Effective width of padeye plate: b1 min 4 T 0.8 dhole Rpadeye rhole b1148.8 mm Effective width of cheek b2 min b1 Rcheek rhole b2148.8 mm Effective width of padeye plate

b3 min 2 Rpadeye 2 b1 dhole Rcheek 2 b3 640mm PADEYE VERIFICATIONS Bearing stress check: Fpin

dpin tpadeye 2tcheek fbe 200 MPa

fbe

Fbe 0.9 Fy

319.5 MPa

Fbe

fbe UCbearing 0.63

UCbearing Fbe Shear stress check:

Fpin fv

2

R

r

padeye hole Fv 0.4 Fy

t

R padeye

cheek

r2 t hole

Fv 142 MPa fv UCShear 0.655

UCShear Fv Net area tension:

Fpin fNet.Area 121 MPa

fNet.Area 2b1 tpadeye 4 b2 tcheek

fv 92.939 MPa cheek

FNet.Area 0.45 Fy

FNet.Area 159.8 MPa

fNet.Area UCNet.Area

UCNet.Area 0.76

FNet.Area

Yielding gross cross section:

Fpin fGross.Section 168.7 MPa

fGross.Section b3 tpadeye

FGross.Section 0.6 Fy

FGross.Section 213 MPa

fGross.Section

UCGross.Section 0.792

UCGross.Section FGross.Section

Pull out of the padeye and cheek: F

if 2 R R padeye cheek "NOT OK" otherwise "OK"

pinchek

Fpinchek "OK"

Cheek weld:

aweldmin

3mm if tpadeye 6.4mm 5mm if 6.4mm tpadeye 12.7mm 6mm if 12.7mm tpadeye 19mm 8mm if tpadeye 19mm

aweldmin 8 mm

γ 1

γt 0.6 F F 2 padeye y pin

aweld

"NOT OK" if tw aweldmin " OK" otherwise

aweld " OK" Cheek force tcheek

Fcheek Fpin tpadeye 2 tcheek Fcheek 1601.9 kN

Cheek weld throat:

Fcheek

fw

2 π Rcheek 0.5 tw 0.707

Fw min 0.30 Fwm 0.4 Fy UCweld

fw Fw

fw 267.1 MPa

2

UCweld 1.843

Fw 144.9 MPa

Padeye Base Verification in accordance with AISC: Stress due Axial Force:

fa

Fx1 Area fa 83.1

MPa

Stress due bending in plane: Fz1 c fin 6.5 MPa

fin Win

Stress due bending out of plane: Ï•wire Fy1 c

g2

dhole 2 fout 532.4

fout

MPa

Wout Area 0.058 m2 Fx1 4.806 106 N Combined Stress fa fin fout UCCombined0.6 Fy 0.6 Fy 0.75 Fy UCCombined 2.42

Shear at Padeye: fv.padeye 2 Fz1 3 Abase

fv.padeye 6.2 MPaFv.padeye 0.4 Fy Fv.padeye 142 MPa fv.padeyeUCShear.Padeye Fv.padeye UCShear.Padeye 0.044

SUMMARY

Cheek Radius - Verification:

Total thickness - Verification: Gap in the diameter of hole - Verification: Gap in the shackles - Verification:

Rcheek 270 mm

Rcheek1 270 mm

Tcheck "OK"

dholecheck "OK" -First Verification: -Second Verification:

Pull out of the padeye and cheek:

Cheek weld mininum: Bearing stress check:

Shear stress check:

Net area tension:

Yielding gross cross section:

Cheek weld throat:

Verification Combined:

Shear at Padeye: fshacklesallowable "OK" finstallation "OK"

Fpinchek "OK"

aweld " OK" UCbearing 0.63

UCShear 0.65

UCNet.Area 0.76

UCGross.Section 0.792

UCweld 1.843

UCCombined 2.42

UCShear.Padeye 0.044

MPa 1 106Pa