Crane, Rigging & Lifting Marlon Arq

8/13/2019 Crane, Rigging & Lifting Marlon Arq

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PowerPointPresentation

Chapter 5Rigging

Rigging Calculating Load Weights Slings Rope Webbing Round (Tubular) Slings Chain Rigging

Component Inspection Rigging Equipment Storage

Rigging Component Recordkeeping


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Chapter 5Rigging

The shape of a load

normally determines

its center of gravity.


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Chapter 5Rigging

A load lifted outside its

center of gravity will

shift to create excess

side stress on one

sling.


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Chapter 5Rigging

A load may be unstable

and subject to topping if

lifting equipment is placed

below the horizontal

weight center of the load.


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Chapter 5Rigging

Stock material weight tables

list the weight of materials by

ft, sq ft, or cu ft.


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Chapter 5Rigging

Numbers may

be rounded off

to allow rapid

material weight

calculations.


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Chapter 5Rigging

Main sling

components

include wire

rope, fiber

rope, chain,webbing, and

round sling.


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Chapter 5Rigging

Other sling

components

include rigging

hardware

attachments suchas clips, hooks,

eyebolts,

shackles,

sockets, wedgesockets, triangle

choker fittings,

and master links.


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Chapter 5Rigging

Basic slings include

vertical (single-leg),

choker, U, basket,

and bridle.


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Chapter 5Rigging

Tension

increases and

load capacity

decreases as

sling legswiden and

sling angles

are reduced.


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Chapter 5Rigging

Fiber rope is constructed by

twisting fibers into yarn, yarn

into strands, and strands into

rope. Wire rope is constructed

by twisting wires into strandsaround a wire core.


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Chapter 5Rigging

The diameter of wire rope is

determined by the largest

possible outside dimension.


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Chapter 5Rigging

Moisture,

temperature,

chemical activity,

and bending reduce

rope strength.


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Chapter 5Rigging

Rope bending

efficiency rating

increases as the

diameter of the

pulley increases.


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Chapter 5Rigging

The most common wire

ropes used for basic

rigging are filler wire,

Warrington, Seale, and

Warrington-Seale.


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Chapter 5Rigging

The strength of rope used for safely lifting a load is

determined by its breaking strength.


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Chapter 5Rigging

Rated strength

capacities of 6 19 wire

rope are based on the

rope diameter and sling.


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Chapter 5Rigging

Seizing is the wrapping placed around all strands of a

rope near the area where the rope is cut.


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Chapter 5Rigging

Common wire rope terminations include thimbles

and sockets.


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Chapter 5Rigging

Clip connections

must be arranged,

spaced, and

assembled properly

to maintain thestrength of the rope.


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Chapter 5Rigging

Proper installation

of a wedge socket

has the live end of

a rope in line with

the socket.


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Chapter 5Rigging

Synthetic fibers are generally stronger than natural fibers.


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Chapter 5Rigging

Fiber rope is

constructed by twisting

fibers into yarn, yarn

into strands, and

strands into rope.


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Chapter 5Rigging

Most rope hitching and knotting terminology was

derived from nautical (sailing) terms.


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Chapter 5Rigging

Whipping is tightly binding

the end of a rope with

twine before it is cut.


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Chapter 5Rigging

A splice is the joining of two rope ends to form a

permanent connection.


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Chapter 5Rigging

Crowning is a reverse strand splice that is used when

an enlarged rope end is desired or not objectionable.


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Chapter 5Rigging

An eye loop isa rope splice

containing a

thimble.


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Chapter 5Rigging

Half hitch and double hitch knotsare not secure knots, but are the

base formation of other knots.


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Chapter 5Rigging

A slip knot is a knot thatslips along the rope from

which it is made.


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Chapter 5Rigging

A bowline knot is aknot that forms a

loop that is secure

but is easy to

release.


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Chapter 5Rigging

A wagoneers hitch knot isa knot that creates a load-

securing loop from the

standing part of the rope.


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Chapter 5Rigging

A timber hitch is a binding knotand hitch combination used to

wrap and drag lengthy material.


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Chapter 5Rigging

A clove hitch is a quickly-formedhitch used to secure a rope

temporarily to an object.


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Chapter 5Rigging

A cats-paw hitch is a quickly-formed eye for light-duty lifting.


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Chapter 5Rigging

A cow hitch is a hitch used tosecure a tag line to a load.


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Chapter 5Rigging

A scaffold hitch is used tosupport planks or beams.


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Chapter 5Rigging

A blackwall hitch is ahitch made for securing

a rigging rope to a

hosting hook.


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Chapter 5Rigging

Webbing is a fabric of high-tenacity synthetic yarns

woven into flat narrow straps.


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Chapter 5Rigging

Basic sling typesare classified as

Type I through

Type IV.


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Chapter 5Rigging

Sling load capacities vary based on the sling angles.


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Chapter 5Rigging

Choker hitch loadcapacity is based on

the angle of choke

as the sling body

passes through thechoke eye.


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Chapter 5Rigging

The type of web slingselected and its use

must be made with

safety as the main

consideration.


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Chapter 5Rigging

Round slings areslings consisting

of one or more

continuous

polyester fiberyarns wound

together to make

a core.


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Chapter 5Rigging

Chain should beremoved from

service if the

measurement of

used chainexceeds 1 1/2%

elongation from

that of new chain.


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Chapter 5Rigging

Each chain, except for hoist apparatus chain, has aperiodic embossing of a grade number or letter,

indicating its capability.


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Chapter 5Rigging

Working load limits for slings using Grade 80 chaincan be determined for a 90vertical load or quad leg

load up to 30pull angle.


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Chapter 5Rigging

A shackle is a U-shaped metallink with the ends drilled to

receive a pin or bolt.


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Chapter 5Rigging

A master link is a chainattachment with a ring

considerably larger than that

of the chain to allow for the

intersection of a hook.


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Chapter 5Rigging

A hook is a curved or bentimplement for holding,

pulling, or connecting

another implement.

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Chapter 5Rigging

Hoisting hooks used forrigging purposes include

choker, grab, foundry,

swivel, and sorting hooks.

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Chapter 5Rigging

A hoisting hook isa steel alloy hook

used for

overhead lifting

and is connecteddirectly to the

piece being lifted.

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Chapter 5Rigging

Kinking, core protrusion,and bird caging may be

encountered when

inspecting a wire rope.

Ch t 5 Ri i


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Chapter 5Rigging

Fiber rope inspection ismade to remove a rope

from service before the

ropes condition poses a

hazard with continuedoperation.

Ch t 5 Ri i


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Chapter 5Rigging

Webbing shouldbe inspected at

least annually

and round slings

should beinspected

monthly.

Ch t 5 Ri i


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Chapter 5Rigging

Chain should beinspected annually.

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Crane, Rigging & Lifting Marlon Arq