Rigger Training and Assessment

RIGGERTRAINING

ANDASSESSMENT

PRESENTEDBY

Mohamed Yehia

Content:- Legislation

RegulationsH S E Guidance

Pre- use examination of lifting equipmentInspection of lifting equipment

Rigging of various loads

Safe operating procedures

Weight estimation

Load stability

Wire rope safety, inspection and careSafe rigging principles

L O L E R Loler regulations1. Came into effect 5th Dec 1998. From this date holders must comply with all the all duty requirements.2. Defining the terms etc. I E. 1974 act means the Health and safety at work act 1974.3. To whom and where.• Ships Merchant Shipping.• Slips Trips And Falls.• Risk Assessment.4. Calls upon the employer to ensure that the strength and stability are adequate.5. Lifting equipment for lifting persons.

L O L E RReg`s Cont`d6. Every employer shall reduce to as low as possible,• The load from striking people.• Load drifting.• Falling.• Being released unintentionally.

7. Every employer shall ensure that, I.e. equipment for lifting people is clearly marked.

8. Properly planned, Properly supervised and Carried out in a safe manner

L O L E RReg`s Cont`d

9. Thorough examination and inspection.• Lifting persons every 6 months.• Accessories lifting gear slings hooks shackles 6 months.• Lifting equipment, mechanical device capable of raising or lowering a load 12 months.

10. Report and defects.

11. Keeping of information.

LIFTING OPERATIONSAPPLICABLE LEGISLATION

• HEALTH & SAFETY AT WORK etc 1974.

1

• MANAGEMENT OF HEALTH&SAFETY AT WORK REGULATIONS 1992.

• LIFTING OPERATIONS AND LIFTING EQUIPMENT REGULATIONS 1998.

• PROVISION AND USE OF WORK EQUIPMENT REGULATIONS 1992 (AMENDED 1998).

• MANUAL HANDLING OPERATIONS REGULATIONS 1992.


HEALTH & SAFETY AT WORK etc ACT 1974• EMPLOYERS RESPONSIBILITIES

2

It shall be the duty of every employer to ensure,as far as is reasonably practicable, the health, safety and welfare at workof all his employees.

• EMPLOYEES RESPONSIBILITIES To take reasonable care for the health and safety of themselves and others who may be affected by their acts or omissions. they must co-operate with their employers as far as is necessary to enable that duty or requirement to be performed or complied with.

No person shall intentionally or recklessly interfere with or misuse any equipment provided in the interest of health,safety or welfare.

3


Management Of Health & Safety At Work Regs 1992• Requires employers and self employed persons to assess the risks to workers and any others who may be affected by their undertaking.

• Suitable and sufficient risk assessments should - be carried out by a competent person, ensure that all relevant risks or hazards are addressed, determine the likelihood of injury or harm arising, take into account any existing control measures.

• Employers with five or more employees must also record the significant findings of that assessment.• Assessment should be reviewed and if necessary modified when the nature of the work or the physical conditions of the work place changes.


Management Of Health & Safety At Work Regs 1992 cont`d

4

- Identify the measures that employers must take in order to comply with their duties under the applicable health and safety legislation.

- Generic or “model” risk assessments are acceptable where similar activities are being under taken in similar places of work.

5


Provision And Use Of Work Equipment Regs 1992• Every employer shall ensure that work equipment is so constructed or adapted as to be suitable for the purpose for which it is used or provided.

• In selecting work equipment every employer shall have regard to the working conditions and to the risks to the health and safety of persons which exist in the premises or undertaking in which the work equipment is to be used.

• The suitability of work equipment should be addressed from three aspects.- it’s initial integrity, - the place where it will be used, - the purpose for which it will be used.

6


Provision And Use Of Work Equipment Regs 1992 cont`d

• “suitable” means that it must be suitable by design, construction or adaptation for the work it is provided to do and suitable in every respect which it is reasonably foreseeable will affect the safety and health of any person.

• Every employer shall ensure:-• That work equipment is maintained in an efficient state,in efficient working order and in good repair,and the where there is a maintenance log it is kept up to date.

• Risk assessments carried out under the MHSWR will help employers to select work equipment and assess it’s suitability for particular tasks.

7


• The use of work equipment is restricted to those persons given the task of using it.

Provision And Use Of Work Equipment Regs 1992 cont`d

• That effective measures are taken to prevent contact with danger- ous parts of machinery,this includes measures at four levels-fixed enclosing guards,other guards or protection devices,protection appliances and the provision of information.

• That all persons who use or supervise the work equipment have available to them adequate health and safety information and where appropriate written instructions pertaining to its use.• That all persons who use work equipment have received adequate training in the methods which may be adopted when using the work equipment, any risks which are entailed and precautions to be taken.

8


Manual Handling Operations Regs 1992• Manual handling operations-means any transporting or supporting of a load by hand or bodily force - I.e. lifting, pulling, pushing, carrying,putting down or moving thereof by hand or bodily force.

• Each employer shall so far as is reasonably practicable,avoid the need for his employee to undertake any manual handling at work.

• They refer to the manual handling of loads by human effort as opposed to mechanical handling by a crane or other such equipment.• A load in this context must be a discrete moveable object but does not include an implement, tool or machine while in use.• The regulation`s seek to prevent injury to any part of the body and as such account should be taken of physical properties which may effect grip or cause direct injury.

9


Manual Handling Operations Regs 1992 cont`d

• Where it is not reasonably practicable to avoid the need for the employee to under take manual handling which involves the risk of injury,the employer shall make a suitable and sufficient assessment of all such manual handling operations.

• Manual handling assessment findings must be recorded.

• The assessment should be carried out by a competent person and shall take into account the task,load,and working environment.

• Properly based generic assessments are acceptable if they draw draw together common threads from a range of broadly similar manual handling operations.


10

Lifting Operations And Lifting Equipment Regulations 1998• Regulation.1 - Citation and commencement - lays out scope and

timing.

• Regulation.6 - Positioning and installation of equipment to minimise risk.

• Regulation.2 - Interpretation - Definitions• Regulation.3 - Application - Details where and to whom the regulations apply.• Regulation.4 - Strength and stability - Calls upon the employer to ensure that the strength and stability of lifting equipment is adequate for use.• Regulation.5 - Takes precedence over all other LOLER regulations when lifting of persons is to be

carried out.


11

Lifting Operations And Lifting Equipment Regulations 1998 cont`d• Regulation. 7 - Marking of equipment to reflect SWL.

• Schedule.1 - Information for report of thorough examination contains a list of key information which must be recorded.

• Regulation. 8 - Organisation of lifting operations to reflect operational safety,adequate supervision and planning.• Regulation. 9 - Thorough examination and inspection to ensure valid

certification,proper manufacture and fitness for use.• Regulation.10 -Reports and defects places a duty on the examiner to

provide a report of examination to employer and HSE in certain circumstances.• Regulation.11 -Keeping of information to ensure that initial

conformity certificates and examination reports follow a piece of equipment.

____________________________________________________________________SPARROWS TRAINING PRESENTATION

_________________________________________________ SPARROWS TRAINING PRESENTATION

Markings illegible

Adjusting clutchesdistorted or cracked

Hooks distorted

Master linkdistortedCoupling componentdistorted or crackedor pins insecure

Safety catchesmissing/damaged

CHAIN SLING INSPECTION POINTS

EYEBOLTS-(BS 4278)

COLLAR EYEBOLT

DYNAMO EYEBOLT EYEBOLT WITH LINK

SHOULD BE USED FOR VERTICAL LIFTS ONLY

INTENDED FOR GENERAL LIFTING

ARE INTENDED FOR PERMANENT ATTACHMENT TO HEAVY PIECES OF EQUIPMENT AND ARE USUALLY FITTED IN PAIRS

_____________________________________SPARROWS TRAINING PRESENTATION

EYEBOLTS

DYNAMO COLLAR COLLAR WITH LINK

.SAME PLANE

CORRECTAGAINST PLANE

INCORRECTSHIM TO CORRECT

ORIENTATION

CORRECT/INCORRECT METHODOF SLINGING WHEN USING

PAIRS OF SLINGS

NOTE:- INCREASE IN LOAD ON EYEBOLT WITH INCORRECT METHOD OF SLINGING.

_____________________________________SPAR R O W S TR A IN ING PR ESEN TATIO N

EY EBO LT C H A R TR EC O M M EN D ED

S.W .L . LO A D S

________________________________________________SPARROWS TRAINING PRESENTATION


_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _S P A R R O W S T R A I N I N G P R E S E N T A T I O N

S U B S T A N C E O R G A N I C S O L V E N T S O I L S N e t R o p e A C I D S A L K A L I S ( X y l e n e , T o u l e n e , M a t e r i a l T r i c , P e t r o l , W h i t e

S p i r i t E T C )

N a t u r a l F i b r e s V e r y V e r y S u s c e p t i b l e T o A t t a c k S u s c e p t i b l e( M a n i l l a & S i s a l ) S u s c e p t i b l e S u s c e p t i b l e B e c o m e E m b r i t l e d T o A t t a c k

T o A t t a c k T o A t t a c k

N Y L O N S u s c e p t i b l e * H i g h l y * H i g h l y R e s i s t a n t T o A t t a c k * H i g h l y T o A t t a c k R e s i s t a n t R e s i s t a n t

T o A t t a c k T o A t t a c k

P O L Y E S T E R * H i g h l y S u s c e p t i b l e * V i r t u a l l y U n a f f e c t e d V i r t u a l l y( T E R Y L E N E ) R e s i s t a n t T o A t t a c k U n a f f e c t e d

T o A t t a c k

P O L Y * H i g h l y * H i g h l y S u s c e p t i b l e T o A t t a c k * N o t A f f e c t e dE T H E L E N E R e s i s t a n t R e s i s t a n t P a r t i c u l a r l y I f S o l v e n t H o t T o A t t a c k T o A t t a c k

P O L Y P R O P * H i g h l y * H i g h l y A t t a c k e d b y s o m e s o l v e n t s * N o t A f f e c t e dY L E N E R e s i s t a n t R e s i s t a n t E . G . X y l e n e a n d T o u l e n e T o A t t a c k T o A t t a c k

S U B S T A N C E S

__ __ __ __ ____ __ __ __ __ __ ___ __ __ __ __ __ __S P A R R O W S T R A IN IN G P R E S E N T A T IO N

S A F E W O R K IN G L O A D S O FM A N -M A D E F IB R E S L IN G S

V E R T IC A L C H O K E R B A SK E T B A SK E T 90 ° B A SK E T 12 0°

C A P A C IT IE SR O U N D S L IN G S

_____________________________________SP A R R O W S T R A IN IN G P R E SE N T A T IO N


C HAI N B LOC K S

D IS T A N C ES U S P E N S IO NL E V E L T OO P E R A T IN GL E V E L

L O A DC H A INA N C H O RP O I N T

L O A DC H A IN

M A I NC H A IN

O P E R A T IN G L E V E L

T O P H O O K

L O A D H O O KD R A W N - U PD IM E N S IO N

R A N G EO F L IF T

B O T T O MH O O KF U L L YE X T E N D E DD IM E N S IO N

C H A IN B L O C K O P E R A T IN G H E I G H T D I M E N S I O N & T E R M I N O L O G Y

HOOK DISTORTED

BODY DAMAGED.COVERS MISSING/DAMAGED

CHAIN WORN,LINKSBENT,NOTCHED,CORRODED OR STRETCHED.ETC

HOOK DISTORTED

SAFETY CATCH MISSING / DAMAGED

MARKINGS ILLEGIBLE

LEVER OR CONTROL DISTORTED

SLACK ENDSTOP MISSING

SAFETY CATCH MISSING/DAMAGED

W IR E R O P E H O IST S

ST A N D A R D R O P E H O IST

T W O T Y P E S O F A P P L IC A T IO N - L IF T IN G A P P L IC A T IO N - P U L L IN G A P P L IC A T IO N

C A P A C IT Y O F H O IS T S D E P E N D IN G O N A P P L IC A T IO NS W L (L IF T IN G ) S W L (P U L L IN G )

800K G 1200K G1600K G 2500K G3200K G 5000K G


BASIC TYPES OFBEAM CLAMP

TROLLEYS OF VARIOUS TYPES

_____________________________________SPA R RO W S TRA IN ING PRESENTATIO N

SW L O F TU R N BU C K L ES/R IG G IN G SC R EW S

BS 4429 D IA (m m ) SW L 10 300K G 12 500K G 16 750K G 20 1.25t 22 2.0t 27 3.0t 30 4.0t 33 5.0t 39 6.0t 42 7.5t 48 10.0t 56 15.0t 64 20.0t 72 25.0t 76 30.0t 85 40.0t 100 50.0t

U .S. FED . SPEC

D IA (ins) W L L

3/8 545K G 1/2 1.00t 5/8 1.59t 3/4 2.36t 7/8 3.27t 1 4.55t 1 1/4 6.90t 1 1/2 9.73t 1 3/4 12.13t 2 16.82t 2 1/2 27.27t 2 3/4 34.09t

DEE TYPE SHACKLE(With screw pin)

BOW TYPE SAFETY SHACKLE(With round bolt & safety pin)

LOADLINE CROWN

BODY

OWNERSHIPIDENTITY

BEARINGSURFACE

PIN

THREADEDPAN

CHECK THAT SHACKLEHAS NOT ‘OPENED-UP’

CHECK FOR WEAR

CHECK FOR WEARAND STRAIGHTNESS

CHECK THAT PINIS ALWAYS SEATEDAND IS ‘MATCHED’ TOBODY

CLEARANCE PINJAW

OPENING(GAPE)

SHACKLESPRE - USE INSPECTION

• Select correct type shackle for the job in hand.

• Check the safe working load of the shackle before use - no SWL - quarantine.• Check shackle pin for excessive wear-if wear

is 1/10th or more of original diameter quarantine.

• Make sure the pin is free-but not loose in the tapped hole(s) of the shackle.• Threads on pin and shackle should be undamaged and without appreciable wear.

• Ensure the shackle is correctly colour coded

SHACKLESPRE - USE INSPECTION

(CONT`D)• Check alignment of pin holes - the untapped hole should not be worn or oversized.• Only properly fitted pins shall be used in shackles.• Home made or modified shackles must never be used.• Check jaws and pin of shackle for distortion. Check body of shackle for pitting,cracks or corrosion.• To test shackle suspend and tap lightly with a hammer or the shackle pin - ”SOUND” shackles should have a “clear” ring or “ping”

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _S P A R R O W S T R A IN IN G P R E S E N T A T IO N

L O C A T IO N O F A T T A C H M E N TT O J IB O R H O O K B L O C K

W E D G E

S O C K E TD E A D E N DO F R O P E

S T R A IG H T L IN E

O F P U L L

L IV E (L O A D E D )P A R T O F R O P E

W E D G E A N D S O C K E T A S S E M B L Y A N D S E T U P


R E C O M M E N D E D R O P ET E R M IN A T IO N

T O B S 7166

T H E D E A D E N D IS L O O P E DB A C K O N IT SE L F & SE C U R E D

W IT H A B U L L D O G C L IP& SO F T W IR E A S SH O W N .

A SH O R T SE C T IO N O F R O P EC A N B E A T T A C H E D T O T H E E N D O F T H E R O P E W IT H A

B U L L D O G C L IP A S SH O W N .O R


W IR E R O P E C L IP S(B U L L D O G S )


C h e c k s w i v e lf o r f r e e d o m o fm o v e m e n t a n dw e a r

C h e c k p i v o tf o r w e a r

C h e c k t h a th o o k c l o s e sc o r r e c t ly( N o g a p s )

H o o k R e le a s eC a m

C h e c k f o rw e a r a n d c r a c k s

C h e c k t h a tR e l e a s e L a t c ho p e r a t e s f r e e l y

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _S P A R R O W S T R A I N I N G P R E S E N T A T I O N

G U N N E B O H O O K S

_____________________________________SPARRO W S TRAINING PRESENTATIO N


R IG H T A N D W R O N G P U L L E Y G R O O V E S

W R O N GP U L L E Y G R O O V E

T O O N A R R O WW R O N G

P U L L E Y G R O O V ET O O W ID E

R IG H TP U L L E Y G R O O V E

C O R R E C T120º O F R O P E

IS SU P P O R T E D


A ngle of fleet

T he fleet angle is the angle form edbetw een a line draw n from the centre of the pu lley to the centre of the drum ,and a line from the centre of the pulleyto the inside edge of the drum flange.

T his angle should not exceed 1 .5°inthe case of sm ooth drum s,and 2°for grooved drum s to ensure the m in im um am ount of side w ear of rope against theadjacent w arp in the case of sm ooth faced drum s,and against the side of the grooves on grooved drum s.

A safe angle can be obtained by allow ingat least 24ft(7 .3m ) of lead for each 2ft(0 .7m )of drum w idth w hen the lead pulley is m ounted on the centre line of the drum .

F L E E T A N G L E S

______________________________________________________________ SPARROWS TRAINING PRESENTATION

WIRE ROPE TABLES


SLING ANGLES

0° 30° 60° 90°120°

0.5 te each sling0.53 te each sling0.58 te each sling0.7 te each sling1.0 te each sling

1.0 TonneThe SWL of a pair of single slings decreases as the angle between them increases.

0°-SWL=SWL of one sling x 2 30°-SWL=SWL of one sling x 2 x 0.966 60°-SWL=SWL of one sling x 2 x 0.866 90°-SWL=SWL of one sling x 2 x 0.707120°-SWL=SWL of one sling x 2 x 0.5

0°-SWL=SWL of one sling x 2 30°-SWL=SWL of one sling x 1.93 60°-SWL=SWL of one sling x 1.73 90°-SWL=SWL of one sling x 1.414120°-SWL=SWL of one sling only.

R O P E B L O C K S


L oad on anchorage1 tonne

L oad on anchorage2 tonne

L oad on anchorageE ffort+ 1 tonne= 1.33tonne

1 tonne1 tonne1 tonne

E ffort or pull=1 tonne

E ffort or pull= 0.33 tonnes

L oad su ppo rted by 3 fa lls o f rope.L oad on each fa ll= 1/3 =0 .33 tonnes

W here excessive m anual effort is likely to be necessary ,an d oth er m eans are n ot availab le ,rope b locks m ay be u sed in con junction w ith a pow er w inch to carry outa lifting op eration .T he pu ll req uired at th e w in ch is d eterm ined by the reev ing arrangem ents as show n below .A w eight o f 1 tonn e suspended from a hook subjects the h ook to a load of one tonne only .(see fig 1 )

If a rope p asses th rough a b lock susp ended from a h ook (see fig 2 ) th e rope supports the tonne w eight on one side of the p u lley an d there is an equal p u ll o f one ton ne on the other sid e.T h e b lock is subjected to both the w eight and the pu ll (e ffort) I.e . a to ta l of 2 tonnes.If a tack le consisting of a dou ble and sing le b lock reeved together is used to support 1 tonne(see fig 3 ) the load is equally d istributed over th e three fa lls: I .e . th e ten sion in each fa ll = 0.33ton nes. S ince the tension on the operatin g rop e m ust equ al the tension in each fa ll,th e e ffort requ ired to raise the load w ill a lso b e0 .33ton nes.It can be sa id that if m ore fa lls are used ,the rope ten sion and effort requ ired to ra ise th e load w ill be red uced .


R O P E B L O C K S C O N T `D

H O W E V E R ,IN C A L C U L A T IN G T H E E FF O R T R EQ U IR E D T O L IF T T H E L O A D A N D T H E L O A D A P P L IE D A T T H E A N C H O R A G E ,A N A L L O W A N C E M U ST B E M A D E F O R F R IC T IO N .IT H A S B E E N F O U N D B Y E X P E R IM E N T T H A T IF 10% O F T H E L O A D IS A D D ED F O R E A C H SH E A V E U SE D ,T H IS W IL L A D E Q U A T E L Y C O M P E N SA T E F O R T H E W EIG H T O F T H E T A C K L E U SE D A N D T H E FR IC T IO N IN T H E SH E A V E S.T H E T O T A L L O A D O N T H E SU P P O R T M A Y B E C A L C U L A T E D B Y A D D IN G A 10th O F T H E W E IG H T O F T H E L O A D B E IN G L IF T E D A N D T H E E F F O R T O N T H E O P ER A T IN G R O PE T O T H E L O A D .

L O A D T O B E L IF T E D = = = = 1 .0 T O N N EA L L O W A N C E = 1/10 O F L O A D FO R E A C H O F 4 SH E A V E S

= 1 /10 O F 1 T O N N E X 4 = 0 .1 X 4 = = = = 0 .4 T O N N E S

L O A D P L U S A L L O W A N C E = = = 1 .4 T O N N E S

E FF O R T = L O A D P L U S A L L O W A N C E D IV ID ED BY N U M B E R O F R E T U R N S = 1 .4 T O N N E S D IV ID E D B Y 4 = = 0 .35 TO N N E SW E IG H T O N SU P PO R T IN G ST R U C T U R E

= L O A D + A L L O W A N C E + E F F O R T = = 1 .75 TO N N E S

1 T O N N E

E FF O R TO R

L IN E P U L L 4 X R E TU R N S

T A B L E L O A D IN G SA R R A N G E M E N T SIN G L E 2 SIN G L E D O U B L E A N D

SIN G L E2 D O U B L E 2 T R E B L ED O U B L E A N D

T R E B L ET H E F IG U R E A G A IN STT H E B L O C K IN D IC A T E ST H E N U M B E R O F SH E A V E S

M E C H A N IC A L A D V A N T A G E

L O A D (T O N N E S)A L L O W A N C E O F 10 % P E R S H E A V E

E F F O R T= L O A D + A L L O W A N C E

W E IG H T O N A N C H O R A G E= L O A D + A L L O W A N C E +E F F O R T

1T O 1

1 .00

0 .10

1 .10

2 .10

1 .00 1 .00 1 .00 1 .00 1 .00

0 .20 0 .30 0 .40 0 .50 0 .60

3T O 12T O 1 5T O 14T O 1 6T O 1

0.60 0 .30 0.270 .350.43

1 .80 1.73 1 .75 1.80 1.87T h e precedin g table shall be used to find the effort req u ired on th e op eratin g rope andthe load on the sup port.T he tab le is based on ca lcu lations for lifting 1 ton ne.W hen liftingany w eight o ther th an 1tonn e,m ultip ly the ap propriate figu re in the tab le b y the w eigh tto be lifted in ton nes.E xam ple:T o find the effort requ ired and load on support,using andtreb le b lock s to lift 7 tonnes.P ull or e ffort for 1 tonn e lift = 0.3 tonn esSo for a 7 ton ne lift,effo rt = 0 .3 x 7 = 2 .1 tonnesL oad on supp ort for 1 tonn e = 1 .8 tonn esSo for a 7 ton ne lift.load on su pport = 1 .8 x 7 = 12 .6 tonn es._____________________________________

SP A R R O W S T R A IN IN G P R E SE N T A T IO N

T H E F O L L O W I N G C H A R T I N D I C A T E ST H E F A C T O R T O B E M U L T I P L I E D

B Y T H E L I N E P U L L T O O B T A I N T H E T O T A L L O A D O N T H E B L O C K .

A N G L E F A C T O R M U L T I P L I E R SA N G L E F A C T O R A N G L E F A C T O R 0 º 2 . 0 0 1 0 0 º 1 . 2 9 1 0 º 1 . 9 9 1 1 0 º 1 . 1 5 2 0 º 1 . 9 7 1 2 0 º 1 . 0 0 3 0 º 1 . 9 3 1 3 0 º . 8 4 4 0 º 1 . 8 7 1 3 5 º . 7 6 4 5 º 1 . 8 4 1 4 0 º . 6 8 5 0 º 1 . 8 1 1 5 0 º . 5 2 6 0 º 1 . 7 3 1 6 0 º . 3 5 7 0 º 1 . 6 4 1 7 0 º . 1 7 8 0 º 1 . 5 3 1 8 0 º . 0 0 9 0 º 1 . 4 1 - - - - - - - - - -

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _S P A R R O W S T R A I N I N G P R E S E N T A T I O N

450 KGS


1000 Kgs


_____________________________________SPA R R O W S TR A ININ G PR E SEN TA TIO N

FU R T H E R E X A M PL E S T H A T SH O WIN C R E A SE D L O A D IN G E FFE C T S O N R O PE S

SU ITA BLE TIM BE R PA C K IN G

SU ITA B LE TIM B ER PA C K IN G

A rope doubled round a shackle or sim ilar sm all diam eter connection is only as strong as the single rope

The SW L for this condition can be taken fromtable tw o single sling reeved

A rope doubled round an appliance or load w ith adiam eter(D ) equal to at least 6 tim es the rope diam eterw ill carry a load, on each leg,equal to the SW L of asingle fall.

This m ethod is not recom m ended for general lifting,but m ay be used for light loads such as placing blocks.The rope w ill only carry half it`s norm al load becauseof doubling through the eye.

A n endless sling reeved w ith a choke angleup to 120ºw ill carry tw ice the load of a singlesling reeved.


E S T IM A T IO N O F W E IG H T

Rigger Training and Assessment

Documents

sparrows training

lo le rreg

wrong pulley

manual handling

ta le

lifting operations

shackles pre

bodily force