what is scaffold

8/4/2019 What is Scaffold

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WHAT IS

SCAFFOLD?

Scaffold is a temporarilyprovided structure which

provides access or platform towork or which is used to support

materials, plant or equipment



Base lift

Foot lift, a lift

erected near to theground.



Bay

The space between thecentral lines of two

adjacent standards alongthe face of a scaffold.



Bay Length

The distance between thecenters of two adjacent

standards, measuredhorizontally.



Height

The height measured fromthe foundation to the top

assembly of ledgers andtransoms



Lift

The assembly of ledgers

and transoms formingeach horizontal level of

a scaffold.



Lift height

The vertical distance

between two lifts

measured center to center



Freestanding scaffoldA scaffold, which is not attached to

any other, structure and is stable

against overturning on its own

account. Or if necessary assisted byguys or rakers and anchors



Independent Tied

ScaffoldsA scaffold, which has two lines

of standards one line

supporting the outside of deck

and one the inside.



Putlog Scaffold

A scaffold which has one line of

standards to support the outside

edge of the deck and utilizes the

wall being built or the; building tosupport the inside edges



Slung scaffold

A scaffold hanging on tubes,ropes or chains from a structure

overhead. It is not capable of being moved or lowered



Suspended scaffold

A scaffold hanging on ropeswhich is capable of being

suspended or raised orlowered



Brace

A tube placed diagonally with

respect to the vertical orhorizontal members of a

scaffold and fixed to them toafford stability



Knee brace

A brace across the corner of anopening in a scaffold to stiffen

the angles or to stiffen end

support of a beam



Ledger braces

A brace at right angles

to the building



Longitudinal brace

A brace generally in theplane of the longer dimension

of the scaffold particularly in

birdcages



Guardrail

A member incorporated in

a structure to prevent the

fall of a person from a

platform or access way



End GuardrailA guardrail placed across

the end of a scaffold or

used to isolate anunboarded part



Ledger

A longitudinal tube normally fixed

parallel to the face of a building in

the direction of the larger

dimensions of the scaffold.



Putlog

A tube with a flattened

end, to rest in or on part

of the brickwork orstructure



Standard

A vertical or nearvertical tube



Transom

A tube spanning across ledgers

to form the support for boardsor units forming the working

platform or to connect the outer

standards to the inner standards.



Base plate

A metal plate with a spigot for

distributing the load from astandard or raker or other load

bearing tube.



Adjustable base

plate

A metal base plate

embodying a screw jack.



Board Clips

A clip for fixing a

board to a scaffoldtube



Toe board clip

A clip used for

attaching toe boards

to tubes.



Coupler

A component used tofix scaffold tubes

together



Parallel coupler

A coupler used to join twotubes in parallel.



Putlog couplerA coupler used for fixing a

putlog or transom to a ledger,

or to connect a tube used only

as a guardrail to a standard



Right angle coupler

A coupler used to jointubes at right angles.



Sleeve Coupler

An external coupler used to

join one tube to another one



Swivel coupler

A coupler used for joiningtubes at an angle other than

right angle.



Joint pin

An expanding fitting placed inthe bore of a tube to connect

one tube to another coaxially



Sole Plate

A timber, concrete or

metal spreader used todistribute the load from a

standard or base plate tothe ground.



Spigot

An internal fitting to join onetube to another coaxially.



Brick Guard

A metal or other fender filling the

gap between the guardrail and toeboard and sometimes

incorporating one or both of these

components



Scaffold Board

A softwood board generally used

with similar boards to provideaccess, working platforms and

protective components such as toe

boards on a scaffold



Sheetinghorizontal, vertical, or inclined sheets of

material such as corrugated metal or

plastics sheet, attached to a scaffold in

order to provide protection from the

effects of weather or alternatively to

protect the surrounding area fromeffects of works being carried out from

the scaffold structure.



Toe Board

An upstand at the edge of a

platform intended toprevent materials or

operatives feet fromslipping off the platform.



Working Platform

The deck from which

building operations are

carried out.



Steel Tubes

Tubes are normally supplied with amaximum length of 6.40 m and are

available in shorter lengths by request.

Used tubes should be free from cracks,splits and excessive corrosion and be

straight to the eye. The end of the load

bearing tubes should be cut clearly and

squarely with axis of the tube and should

not show excessive wear.



Scaffolding Boards

1, scaffold boards of nominal crosssection 38 mm x 225 mm

2, components of similar width butlaminated timber or metal, with

equal or greater strength

3, timber boards of other thickness

or greater with than normal boards



Scaffolding Boards

1, boards shows signs of ill –

treatment,abuse or decay should be discarded from

site2,the hoops or other means of protection

should be replaced or re-fixed

3,Boards should be stacked flat and raised

from the ground by crossing battens



Independent scaffold an independent scaffold consists of a double row

of uprights, with each row parallel to the building

the row of standards nearest to the building can

be set back about 300 mm from the building face

Upright should be connected with ledgers with

right angle couplings and transom fixed to the

ledgers with putlog couplings

Sole plates & base plates should be used for eachstandards

Ledger bracing is generally fixed to alternate

pairs of standards

Putlog Scaffolds



Putlog ScaffoldsPutlog consists of a single row of uprights

parallel to the face of the buildingThe standards are connected with ledger fixed

with right angle couplers and the putlogs are fixed

to the ledgers with right angle couplers or putlogcouplers

The blade end of the putlog tube or putlog

adaptor is normally placed horizontally on the

brickwork being built

sole plate and base plates are usually used under

each standard.



Box Ties

This is consists of an assembly of tubes andcouplers

what is scaffold

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