SlingProVer4-1

1) EN 13414 ( 2003 ) 2) DNV 2.7-1 ( 2006 ) [ & EN 12079 ( 2006 ) ] 3) DNV M.Ops. ( 1996 ) 4) EN 818 ( 2008 ) [ Chain slings ]

SlingPro ver4-1:2012

Engineering

10/1/2012

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SLING DESIGN

Checked

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Date

Date

Date

02.05.09

03.05.09

Job no.

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Page no.

111

222

1

INPUT

EN 818-4 Input factors 25.00

Weight of item = W ( Te ) =

Sling Apex Angle ( αº )

9 120 45º 0º º 120º The sling apex angle will normally be αº = 90º, however ●

it can be anything, and is often choosen to be αº = 60º. Even if another angle is choosen this will only affect the lengths of the slings, because the sling will still be designed, and certified at either αº = 90º, or 120º.

Design of a 4 leg chain sling, in accordance with

( i.e. at βº=0-45º or βº=45-60º ( αº=0-90º, or αº=90-120º ) )

EN 818-4 : 2008, Short Link Chain for Lifting

Plan of the centre of gravity, and the 4 padeyes

Purposes - Safety - part 4 : Chain Slings - grade 8.

4 Le g Sling Plan

This code is recognised as complying with the EEC Machinery Directive, and the sling can be

y(m)

CE marked. This method is intended to be used for a 4 equal leg length sling.

y

Units

Dynamic Factor

Metric - m, Te American - ft, ton

●

1 :- Normal lift 1.3 :- Offshore dynamic

2.00

x

OUTPUT SWLreq ( = W x Dynamic Factor )

x(m) 25.00

SWLreq ( Te ) =

Sling geometry

2.00 2.83

Diagonal plan length = d ( m ) =

Sling factors & capacity ( WLLsling = KL . MBL / FofSreq )

Leg geometry for αº = 90º & αº = 120º αº

Height

αº True length

KL

FofSreq

WLLsling

(3cos(αº/2))

( Te )

(m)

(m)

90

1.41

2.00

90

2.121

4.00

26.52

120

0.82

1.63

120

1.500

4.00

18.75

Leg geometry for αºreq 90

1.41

2.00

SLING COMPONENT SELECTION Master Link Assembly Fmin = 2.12 MBL/4.00 ( SWLreq ( Te ) = )

Chain Sling ( 4 legs ) 26.52 25.00

Excel

SWLreq ( Te ) =

Excel Chain, grade 8

Eye Sling Hook 25.00

Fmin ( Te ) = MBL/4.0 =

12.50

WLLsling

( Tension = SWLreq/2.12 = )

11.79

(0= Fmin = 1.5MBL/4.00. 36 min 22 16 The eye sling hook must be selected to be stronger than a sling leg, i.e. WLL >= Fmin = MBL/4.00. 38 26 20 25.00 8.84 SWLreq (22 = 4/3 x FofSprov,dynamic ) Max 44 ( Te ) = 32 Stat. Ten. ( Te ) = 4.32 5.66 5.79 FofSprov = FofSprov = FofSprov = 45 26 50 above are 'static factors', assuming that all 4 sling legs The 32are working ( and equally loaded ) 55 58 70 80

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SlingPro ver4-1:2012

Engineering

10/1/2012

Client

Full Version Licensed to

Spreadsheets.co.uk

Company Name

Project

Street Address

Address

Descript.

Town, Postcode

Name of Client

Name of Project Description of the Design Item

SLING SPECIFICATION EN 818-4 In accordance with EN 818-4 : 2008, Short Link Chain for Lifting Purposes Safety - part 4 : Chain Slings - grade 8.

Order list WLL ( Te ) = 26.52 Item 1 of 4 Leg Sling Assembly

apex angle = 0