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Lifting Lug Calc - DIN 28086-SS

The document outlines the lifting lug calculations according to DIN 28086 for a single point lift, detailing the weight, load factors, and forces involved. It includes specific calculations for vertical forces, bending moments, and stresses on the lifting lug and weld seams, ensuring they remain within allowable stress limits. The lifting lug dimensions and material properties are also specified, along with the relevant calculations for safety and compliance.

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209 views1 page

Lifting Lug Calc - DIN 28086-SS

The document outlines the lifting lug calculations according to DIN 28086 for a single point lift, detailing the weight, load factors, and forces involved. It includes specific calculations for vertical forces, bending moments, and stresses on the lifting lug and weld seams, ensuring they remain within allowable stress limits. The lifting lug dimensions and material properties are also specified, along with the relevant calculations for safety and compliance.

Uploaded by

pberghuis
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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LIFTING LUG CALCULATION acc.

DIN 28086
Single point lift
Weight of vessel + payload m 125.00 kg
Load Factor a 5.00 (offshore lift = 2.0 / onshore lift = 1.25)
Vertical force Fv 6125.00 N Fv=m*a*9.8
Number of lugs n 2
Vertical force per lug Fe 3062.50 N Fe=Fv/n
C of G shift factor CGSF 1.05
Maximum hoist angle α 45 22.5 degrees (see SJD-PRO-422-EN)
Distance to centre of gravity Dcog 500 mm
Total force per lug Ft 3480.57 N

Material w.st. 1.4404


Stress yield Rm 520.00 N/mm^2
Allowable stress Sall 199.75 N/mm^2

Lifting lug dimensions


Width w 50.00 mm
Thickness s 8.00 mm
Hole diameter d 16.20 mm
Height h 56.62 mm
Weld thickness a 2.00 mm

Lifting lug calculations


Torque length 2c 33.10 mm 2c=(w+d)/2
Bending moment Mb 14400.85 Nmm Mb=Ft*2c/8
Section Modules W 476.02 mm^3 W=(s*b^2)/6
Bending stress Sb 30.25 N/mm^2 Sb=Mb/W
Tensile stress St 12.87 N/mm^2 St=(Ft/2)/(s*b)*2
Combined stress Scom 43.12 N/mm^2 Scom=Sb+St
Allowable stress Sall 199.75 N/mm^2

Weld seam calculations


Horizontal force Fx 2461.13 N Fx=SIN45*Ft
Vertical force Fy 2461.13 N Fy=COS45*Ft
Section modules Ws 2745.58 mm^3
Sectional area weld As 248.00 mm^2
Bending stress Sb 50.75 N/mm^2 Sb=Fx*h/Ws
Tensile stress St 9.92 N/mm^2 St=Fy/As
Shear stress T 9.92 N/mm^2 T=Fx/As
Combined stress Scom 61.48 N/mm^2 SQR((Sb+St)^2+T^2)
Allowable stress Sall 199.75 N/mm^2

Ws = (s+2a)*(w+2a)^3-(s*w^3)/(6*(w+2a))
As = (w+2a)*(s+2a)-(s*w)

User Cryoworld Job P24-156


Client - Item
Location Wieringerwerf Part LIFTING LUG
Prog. rev. [015] Revision 0
Date 2/22/2012 Signed Pbe Code DIN 28086 Page 21

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