Padeye Design Guidelines
TP2016-001-Rev01
The following guide gives an overview of padeye design based on DNV design rules and common industry
practice.
For any manufactured equipment, the geometry of the padeye must match the size of shackle to be used to
ensure a rated connection between the equipment and the lifting set.
DNV states two key sizing rules which are of importance:
•
The diameter of the holes in the padeye shall match the shackle used, clearance between shackle pin and
padeye hole shall not exceed 6% of the shackle pin diameter.
•
The thickness of the padeye at the hole shall not be less than 75% of the inside width of the joining
shackle
The correct design of padeye should be selected based on the particular load application. For straight lifting
angles a symmetric padeye design should be used, for a multi-point lift as in a offshore container or frame then
a nonsymmetric design can be used. If required plated supports can be added to the symmetric design to
increase the lateral stiffness of the padeye, useful when the padeye will be subjected to dynamic load angles.
BOLT TYPE ANCHOR LIFTING SHACKLE WITH
NUT & SPLIT PIN (CROSBY OR VAN BEEST)
60°
PADEYE
Symmetric Padeye
LOAD ANGLE
TYPICALLY 30°
Nonsymmetric Padeye
Symmetric Padeye
(Supported)
For a multi-point lift it is essential that the padeyes point directly to the lift point centre to prevent lateral
bending moments on the padeyes, DNV suggest a tolerances of 2.5 degrees as an allowable misalignment.
For padeyes rated above 2000kg capacity cheek plates must be fitted to reduce the play in the shackle-padeye
connection. These must be fitted as additional plates welded onto the padeye profile and not a single boss as
shown below.
 x
Padeye Materials
For equipment used in a marine environment, all padeye materials are to be S335J2 (BS EN 10025) supplied with
3.1 material inspection certificates to BS EN 10204.
Padeye Welding
All padeyes must be welded to the primary struture by use of full penetration welds. It is good practure to extend
the base of the padeye to pass it completely through the structural member which it is connected to. If welding
directly onto horizontal plate then the plate must be specified as EMZ grade to prevent delamination of the plate
under tensile load.
When sizing the correct padeye for your application consider the following:
•
Maximum foreseen gross load
•
Load test requirements
•
Dynamic amplification factor (DAF)
•
Drag load on equipment when lifting through water
•
Potential captured water weight when lifting equipment out of water
This document has been created as a guide and should not be used as a substitute to correct design calculations.
All lifting frames including padeye design should be checked by calculation and ideally independently checked
and approved prior to manufacturing. Post manufacture load testing must be performed prior to equipment use.
www.technikdesign.co.uk
sales@technikdesign.co.uk
Page 1 of 3
Padeye Design Guidelines
TP2016-001-Rev01
10 TYP
10 TYP
35
40
+0.2
8 0
R17.5
+0.2
10 0
R15
10
65
500KG PADEYE
750KG PADEYE
R25
+0.2
13.2 0
R20
85
100
15 TYP
12 TYP
45
50
+0.2
11.5 0
12
75
15
1,000KG PADEYE
1,500KG PADEYE
4 TYP
4 TYP
R32
+0.2
20 0
110
20 TYP
15 TYP
55
60
45 TYP
50 TYP
R30
+0.2
16.8 0
15
12
120
2,000KG PADEYE
3,250KG PADEYE
+0.2
26 0
4 TYP
+0.2
23 0
15
4 TYP
130
20
4,750KG PADEYE
www.technikdesign.co.uk
20 TYP
20 TYP
65
75
60 TYP
70 TYP
R35
R45
160
25
6,500KG PADEYE
sales@technikdesign.co.uk
Page 2 of 3
Padeye Design Guidelines
6 TYP
+0.2
33 0
R55
25 TYP
195
25 TYP
85
90
80 TYP
R55
6 TYP
80 TYP
+0.2
30 0
TP2016-001-Rev01
25
8,500KG PADEYE
9,500KG PADEYE
8 TYP
R60
+0.2
40 0
10 TYP
30 TYP
30 TYP
95
100
80 TYP
90 TYP
R55
+0.2
36 0
30
200
30
210
12,000KG PADEYE
13,500KG PADEYE
10 TYP
+0.2
52 0
10 TYP
R85
260
40 TYP
40 TYP
115
130
110 TYP
130 TYP
R75
+0.2
43 0
30
230
30
300
17,000KG PADEYE
25,000KG PADEYE
15 TYP
+0.2
58 0
50 TYP
150
150 TYP
R90
320
40
40
35,000KG PADEYE
www.technikdesign.co.uk
Notes:
1.
The padeye sizes have been created for
compatibility with Crosby Bolt Type Standard,
Crosby Bolt Type Alloy, Van Beest Green Pin
Standard and Van Beest Green Pin Super shackles
incorporating all dimensional differences and
manufacturing tolerances within the shackle types.
2.
For padeyes subjected to side loading fit additional
plates to increase the lateral stiffness of the padeye.
3.
Line bore holes through padeye and cheek plates
when possible.
4.
Do not apply paint system top toat within through
hole on padeye.
5.
Load test all padeyes/equipment prior to use.
6.
All drawings views not to the same scale.
sales@technikdesign.co.uk
Page 3 of 3