010 05Oct09 COP Demolition Works

8/12/2019 010 05Oct09 COP Demolition Works

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CONSTRUCTION INDUSTRY STANDARD

CODE OF PRACTICEFOR

DEMOLITION OF BUILDINGS

FOREWORD

This Malaysian Standard was developed by the Technical Committee or Constr!ction

"ractices !nder the s!pervision o Constr!ction Ind!stry Development #oard$ Malaysia%

This Code o "ractice was drated to provide &!idance on sae and &ood practices or

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demolition wor(s and or compliance with the re)!irements o the relevant provisions by

local a!thorities as well as &ood practices in demolition wor(s in Malaysia%

This Code o "ractice was developed based on the Code o "ractice or Demolition o

#!ildin&s p!blished by #!ildin& Departments o *on& +on& in year ,--.% Someamendments were made to the code where appropriate to s!it local condition%

The Code contains basic inormation or the practitioners and contractors on betterplannin& and control when carryin& o!t demolition wor(s% This Code s!persede MS ,/,

"art '0 '123$ Code o practice or b!ildin& operations code0 "art '0 Demolition% Users o

the Code sho!ld e4ercise their own proessional 5!d&ment in the application o this Codein selectin& the most s!itable demolition method%

Compliance with this Malaysian Standard does not o itsel coner imm!nity rom le&al

obli&ations%

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CONTENTS

Page

1. GENERAL 1

1.1 Scope 1

1.2 Definiion! 2

2 PLANNING "

2.1 B#i$%ing App&ai!a$ an% De'o$iion P$an "

2.1.1 Building Survey2.1.2 Structural Survey 14

2.1.3 Dilapidation Survey 152.1.4 Demolition Plan and Stability Report including Calculations 15

2.2 Ui$iie! 1(

2.2.1 ermination o! "tilities 1#2.2.2 $!!ects o! Demolition on "tilities 1#2.2.3 Common "tilities 1#2.2.4 %aintenance o! Certain "tilities 11

2.) *a+a&%o#! Mae&ia$ 11

2.3.1 &sbestos Containing %aterial 112.3.2 Soil Contamination %aterial 12

). PRECAUTIONAR, MEASURES 1)

).1 Gene&a$ 1)

).2 *oa&%ing an% Co-e&e% Wa$/a0 1)

3.2.1 Re'uirements !or (oarding) Covered *al+,ayand Catc- Plat!orm 13

3.2.2 Dimensions 153.2.3 Design Criteria 153.2.4 Proper "se o! Covered ,al+,ay 1

3.2.5 Construction 13.2./ 0ig-ting 1

).) Scaffo$%ing! an% Sc&een Co-e&! 1

3.3.1 Sca!!oldings 13.3.2 Screen Covers 2#

)." Cacfan 21

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3.4.1 Re'uirements 213.4.2 Steel Catc-!an 21

).3 Te'po&a&0 S#ppo&! 2"

3.5.1 eneral 243.5.2 %aterials and ypes 2/

3.5.3 0oads 23.5.4 Structural &nalysis and Design 23.5.5 emporary Propping System 23.5./ $rection and Dismantling 3#

).4 P&oecion of P&ope&ie! )(

3./.1 eneral 3#3./.2 Party *alls and $ternal *alls 3#3./.3 oundation Support 32

).5 P&oecion of T&affic )2

3..1 &dacent ra!!ic 323..2 ra!!ic 6mpact &ssessment 323..3 Site &ccess 33

). Specia$ Safe0 Con!i%e&aion! ))

3..1 raining and Communication 333..2 $'uipment %aintenance 343..3 $lectrical Sa!ety 343..4 ire 343..5 7ccupational (ealt- 343../ $mergency $it Re'uirements in Demolition Sites 353.. 8ibration 35

).6 En-i&on'ena$ P&eca#ion! )4

3.9.1 &ir Pollution 3/3.9.2 :oise 3/3.9.3 *ater 3/3.9.4 (a;ardous %aterials 3/

).1( De7&i! an% Wa!e *an%$ing )5

3.1#.1 C-utes 33.1#.2 Debris Recycling 33.1#.3 Dust %inimi;ation 393.1#.4 Debris &ccumulation 39

3.1#.5 Debris Disposal and %anagement System 393.1#./ Debris 0oading 4#3.1#. *aste %anagement 4#

).11 In!pecion an% Mainenance "1

).12 Po!8De'o$iion P&eca#ion! "2

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". MET*ODS OF DEMOLITION

".1 Gene&a$ ""

".2 Top Do/n 8 Man#a$ Meo% ""

4.2.1 eneral 444.2.2 Demolition Se'uence 454.2.3 Cantilevered Structures and Balconies 454.2.4 $terior *alls) Beams and Columns 44.2.5 loor Slabs 54.2./ 6nterior Beams /#4.2. 6nterior Columns /#

".) Top Do/n 9 B0 Macine! 4(

4.3.1 eneral /#4.3.2 Demolition Se'uence /34.3.3 Cantilevered Canopies and Balconies /44.3.4 $terior *alls) Beams and Columns #4.3.5 loor Slabs 14.3./ 6nterior Beams 14.3. 6nterior Columns 1

"." Mecanica$ Meo% 70 *0%&a#$ic C!e&! 54/i Long Boo' A&'

4.4.1 eneral /4.4.2 &pplication Criteria /

".3 W&ecing Ba$$ 5

4.5.1 eneral 4.5.2 &pplication Criteria #

".4 I'p$o!ion 2

4./.1 Pre


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5.1.2 Simple Precast Construction 935.1.3 Continuous Precast Construction 95

3.2 P&e!&e!!e% Conc&ee Sc#&e! 63

5.2.1 eneral 955.2.2 Classi!ication o! Prestressed Concrete Structures 95

5.2.3 Precautionary Site %easures 9/5.2.4 Demolition Procedures 9

3.) Saica$$0 Dee&'inae Sc#&e! 1(1

5.3.1 eneral 1#15.3.2 Cantilevered Structures 1#25.3.3 (inged or Pin


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4. SITE SUPER:ISION AND INSPECTION 11)

4.1 Gene&a$ 11)

4.2 Re!i%en S#pe&-i!ion fo& De'o$iion of 11)

Co'p$e; Sc#&e!

2


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able o! Contents

Appen%i; A DEMOLITION C*EC


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0ist o! ables

Li! of Ta7$e!

Page

Ta7$e ).1 Wi% of Co-e&e% Wa$/a0 13

Ta7$e ).2 De!ign C&ie&ia fo& Co-e&e% Wa$/a0 an% Cac P$afo&' 13

Ta7$e ).) Mini'#' !pecificaion fo& Po$00$ene Ne 2(

Ta7$e )." P&opping Re>#i&e'en! on e Ope&aion of Mecanica$P$an on S#!pen%e% F$oo& 26

Ta7$e ".1 S#''a&0 of Gene&a$ Ca&ace&i!ic! of De'o$iionMeo%! "48"5

Ta7$e C81 No&'a$ Span Dep Raio of Reinfo&ce% Conc&eeF$oo& S0!e'? E;cee%ing /ic co#$% 7e an In%icaionof e E;i!ence of a P&ie!e!!e! S0!e' C)

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0ist o! igures

Li! of Fig#&e! Page

igure 3.1 Criteria !or (oarding > Covered *al+,ay 14igure 3.2 ypical Steel Catc- Plat!orms and Covered *al+,ays 1/


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DEMOLITION OF BUILDINGS 9 CODE OF PRACTICE

1. GENERAL

1.1 Scope

-is Code o! Practice outlines good practices !or t-e planning and implementation o! demolition,or+s !or di!!erent types o! buildings in %alaysia aiming at minimising t-e ris+s o!A

&@ causing damage to persons and properties o! t-e public

B@ endangering t-e -ealt- and sa!ety o! site personnel and

C@ damaging t-e neig-bour-ood environment.

-e Code is intended to give guidelines !or engineering practice and sa!e procedures !or variousdemolition met-ods !or buildings !ive storey and above and to provide guidance on t-ecompliance ,it- re'uirements o! t-e relevant acts and regulations. &spects related toenvironmental) occupational sa!ety and -ealt- s-ould be re!erenced to ot-er relevantre'uirements and regulations.

-is Code sets out t-e guidelines !or demolition o! buildings and is applicable to individualstructures) partial demolition o! buildings) basements) underground tan+s) and common civilengineering structures) e.g.) silos) industrial plants) piers) etc. (o,ever) t-is Code is not intendedto cover maor civil engineering ,or+s) suc- as underpinning) ecavation) -ig-,ay or rail,aybridges) dams and steel or timber structures buildings.

-is Code covers met-ods commonly used in building demolition. &ny ot-er demolition met-odsmay also be used subect to care!ul consideration and recommendations made by t-e RegisteredPro!essional $ngineer and Registered Specialist Contractor in t-e Demolition Category ,it- C6DB?-ereina!ter re!erred to Registered Specialist Contractor ?Demolition@) or t-eir consultants basedon ,ell supported scienti!ic researc- and engineering assessment.

1.2 Definiion!

or t-e purpose o! t-is Code) t-e !ollo,ing de!initions s-all applyA

@B$a!ing E;pe&means a person or a company ,-o -as eperience in blasting ,or+s and -asobtained permission as ,ell as approval !rom Police to carry out blasting ,or+s at a speci!ic site.

@B#i$%ing *eigmeans t-e vertical distance measured !rom t-e top most part o! t-e building to

be demolis-ed to t-e lo,est ground level

@B#i$%ing S#&-e0means an inspection on t-e building and its surroundings aiming at spottingany potential problems t-at may arise during demolition and developing a met-od statement !ordemolition

@Cac P$afo&'is a temporary structure erected on top o! t-e covered ,al+,ay or underneat-t-e structures t-at are being demolis-ed including) but not limited to) balconies and cantileveredstructures !or t-e purpose o! catc-ing and retaining debris and to protect t-e area beneat- suc-structures being demolis-ed

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@Cacfanis a temporary structure erected around and attac-ed to or abutting t-e eterior ,allo! t-e building being demolis-ed !or t-e purpose o! catc-ing and retaining debris t-at !all outside

t-e building

@Co-e&e% Wa$/a0means a temporary structure ,it- protective roo! erected along t-e siteboundary and on or adacent to t-e eisting !ootpat- to protect pedestrians !rom t-e !alling debrisduring demolition

@De'o$iionmeans dismantling) ra;ing) destroying or ,rec+ing any building or structure or anypart t-ereo! by pre


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@Te&'a$ Lancemeans an intense -eat process used to cut or sever structural elements)including rein!orced concrete elements) by means o! a -ig- temperature torc- ,it- -eat source

generated !rom !usion o! oygen and metal.

2. PLANNING

2.1 B#i$%ing App&ai!a$ an% De'o$iion P$an

Prior to carrying out any building demolition) detailed building appraisal by means o! surveys andappropriate assessments s-all be re'uired. 6n general) t-e surveys s-all include a BuildingSurvey) a Structural Survey and a Dilapidation Survey ,it- p-otograp-s or videos ta+en !or !uturere!erence. Based on t-e !indings o! t-ese surveys) a demolition plan s-all t-en be prepared andsubmitted to t-e 0ocal &ut-orities. -e demolition plan must also be accompanied by a reporttoget-er ,it- structural calculations assessing t-e stability o! t-e building to be demolis-ed andall a!!ected buildings) structures) streets) land and services.

2.1.1 B#i$%ing S#&-e0

&@ Record Dra,ings

Prior to t-e Building Survey) t-e eisting record plan) including layout plan s-o,ingadoining properties) pedestrian ,al+,ay) roads and street) etc. s-all be retrieved.

B@ Survey 6tems

-e Building Survey s-all cover t-e !ollo,ingA

1@ -e construction materials

2@ -e eisting use and) i! possible) t-e past uses o! t-e building prior to demolition

3@ -e presence o! ,aste,ater) -a;ardous materials) matters arising !rom toicc-emicals) !lammable or eplosive and radioactive materials) etc. and possiblepresence o! materials ,-ic- can contribute to air pollution and soil contamination

4@ Potential dangerous areas) e.g.) abnormal layouts) presence o! enclosed voids) andnon


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@ (oarding and covered ,al+,ay re'uirements

9@ &doining pedestrian and ve-icular tra!!ic conditions

1#@ &vailable -eadroom) clear spaces and distance o! building !rom lot boundary ,-ic-may a!!ect t-e loading operation and transportation o! building debris duringdemolition

11@ -e sensitivity o! neig-bor-ood ,it- respect to noise) dust) vibration and tra!!icimpact

12@ &vailable site area to allo, on


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3@ -e met-od o! construction

4@ &ny dilapidation and degree o! deterioration on any structural elements

5@ -e structural conditions o! adoining structures and its s-oring ,-ic- may bea!!ected by t-e proposed demolition ,or+

/@ -e presence o! continuous structures t-at may be truncated by t-e demolition

@ -e structural system and structural conditions o! basements) underground tan+s orunderground vaults

@ -e presence o! eposed bracing or possible presence o! covered bracing

9@ -e nature o! ,alls) ,-et-er it is bloc+,all) rein!orced concrete ,alls) load bearing,alls or partition ,alls

1#@ Cantilevered structures suc- as canopies) balconies) or ot-er !orms o! arc-itectural!eatures and

11@ &ny !itures to t-e building suc- as signboard) sun


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c@ 6n t-e event) any structural !ailure or de!ects to t-e surrounding building or structures t-eRegistered Specialist Contractor ?Demolition@ s-all recti!y and ma+e good t-e de!ects at -is

o,n epense as soon as possible.

2.1." De'o$iion P$an an% Sa7i$i0 Repo& inc$#%ing Ca$c#$aion!

&@ Demolition Plan

& Demolition Plan s-all include t-e !ollo,ingA

1@ & plan s-o,ingA

a@ t-e location o! t-e building to be demolis-ed

b@ a detailed topograp-y o! t-e site and its surrounds toget-er ,it- ground levelcontours and sections o! t-e slopes and ground supported by t-e building ,-ereappropriate

c@ details o! ground removal andEor bac+!illing and

d@ t-e distances !rom t-e building to be demolis-ed to its adacent buildings) streets)structures and signi!icant street !urniture.

2@ & layout plan o! all !loors o! t-e building to be demolis-ed) ,it- ade'uatesections) s-o,ingA

a@ t-e occupancy usage o! t-e !loors

b@ t-e structural support systems

c@ principal materials o! construction

d@ t-e condition o! t-e building e.g. t-e degree o! deterioration and

e@ t-e relations-ip o! t-e building to be demolis-ed ,it- neig-bouring propertiesa!!ected by t-e demolition) ,-ic- include all adoining buildings and unaut-ori;edstructures) s-ared staircases) party ,alls) truncating continuous !rames) slopes)retaining ,all) over-ead cables) guy ,ires and underground utility services.

3@ & plan s-o,ing t-e structural arrangement and construction o! all unconventionalstructural elements) suc- as prestressed concrete structures) precast concretemembers) stressed s+in structures) steel !ramed structures) -angers) -anging ties)

trusses or 8ierendeel girders) deep beams) long span beams ?greater t-an 1#m@)arc-es) trans!er plates) trans!er girders) eart- retaining or basement structures)buildings ,-ic- also act as eart-


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5@ 6n t-e case ,-en po,ered mec-anical plants and e'uipment are used) a plans-o,ing t-e route o! movement o! po,ered mec-anical plants and e'uipment

including t-e met-od o! li!ting mec-anical plant) ,-ere necessary) onto t-e top !loorso! t-e structure any structural alterations re'uired to suit t-e demolition) e.g.temporary strengt-ening to suit early removal o! any ground !loorEor coc+lo!t structureto !acilitate ve-icular movement at ground !loor) or strengt-ening o! deteriorated +eystructural members and any s-oring) temporary supports andEor !loor proppingre'uired

/@ & plan s-o,ing all precautionary measures !or t-e protection o! t-e public including-oardings) covered ,al+,ays) catc- plat!orms) catc-!ans) sca!!olding) protectivescreens and sa!ety nets

@ & plan s-o,ing t-e proposed s-oring and precautionary measures !or all a!!ectedadacent buildings) slopes) retaining structures and services at eac- stage o! t-edemolition ,or+s

@ & plan s-o,ing t-e proposed s-oring and temporary support to be provided to t-ebuilding to be demolis-ed

9@ & plan or descriptive notes on t-e proposed met-ods !or -andling and disposal o!debris includingA

a@ t-e permissible temporary accumulation o! building debris at upper !loors and atground !loor

b@ met-od o! -andling demolis-ed building debris

c@ t-e routing and movement o! debris !rom eac- !loor to on grade -olding area prior to

leaving t-e site

d@ means o! transportation o! debris o!! t-e site

e@ time and !re'uency o! debris disposal o!! site

!@ record sc-eme on t-e tonnage o! eac- truc+ load) truc+ licence plate) driverFs name)trip tic+ets and location o! dump site

g@ t-e site supervisory personnel responsible !or t-e debris management system and

-@ a temporary par+ing layout !or mobile mac-ines and truc+s) i! necessary

B@ Stability Report including Calculations

-e Stability Report s-all include t-e !ollo,ing partsA

1@ a report on t-e stability o! t-e building to be demolis-ed during all stages o!demolition

'2


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2@ in t-e case ,-en po,ered mec-anical plants or e'uipment are used) a report on t-estability o! t-e building ,it- supporting calculations to demonstrate t-at t-e use o! t-e

plants and e'uipment ,ill not render inade'uate t-e margin o! sa!ety o!) or causedamage to any building) structure) street) land and services

3@ in t-e case ,-en po,ered mec-anical plants or e'uipment are used) structuralcalculations !or all temporary supports and bracings

4@ a report on t-e stability o! neig-bouring buildings) adoining properties as stated in2.1.1.B@ 5@) party ,alls) streets) land and services ,-ic- may be a!!ected by t-edemolition ,or+

5@ in t-e case ,-en temporary or permanent supports are re'uired to t-eseneig-bouring buildings) adoining properties) and party ,alls) structural calculations!or t-ese temporary and permanent supports and

/@ a report ,it- calculations demonstrating t-at t-e demolition ,or+ ,ill not renderinade'uate t-e margin o! sa!ety o!) or cause damage to any building) structure)street) land and services.

& c-ec+list !or preparing a Demolition Plan and Stability Report ,it- Calculations isdepicted in &ppendi B.

2.2 Ui$iie!

2.2.1 Te&'inaion of Ui$iie!

Prior to actual demolition) t-e &ut-ori;ed Person s-all liaise ,it- all available utility companies soasA

&@ to +eep records o! available utilities leading into t-e premises and B@ to cause all utilities tobe terminated.

2.2.2 Effec! of De'o$iion on Ui$iie!

-e demolition plan s-all ensure t-at during t-e course o! demolition) no eisting utilities in t-evicinity o! t-e demolition sites are a!!ected by t-e demolition operation.

2.2.) Co''on Ui$iie!

-e common utilities encountered in building demolition generally include t-e !ollo,ingA

&@ $lectricity

B@ *ater

C@ as

D@ elecommunication

$@ Drainage

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@ 7ver-ead and "nderground Cables

@ Rail,ay unnel and its accessories) suc- as vent s-a!ts

(@ Se,age unnel and its accessories and

6@ Disused unnel.

&ll utility companies and relevant agencies s-all be consulted prior to demolition o! t-e structure.

2.2." Mainenance of Ce&ain Ui$iie!

&@ During demolition) t-e !ollo,ing basic utilities s-all be re'uired to provide a sa!e and-ealt-y ,or+ing environmentA

1@ emporary ,ater supply s-all be re'uired to provide ,ater spraying during demolitionas dust pollution abatement measures

2@ emporary telecommunication lin+ bet,een t-e demolition site and outsideorganisation s-all be maintained !or bot- security and communication reasons and

3@ emporary electricity supply !or lig-ting and ot-er construction use.

B@ 6n t-e case ,-en temporary utilities are available) all suc- temporary utilities) includingelectrical !ittings s-all be ,eat-er


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). PRECAUTIONAR, MEASURES

).1 Gene&a$

Site sa!ety !eatures s-all emp-asise protection o! t-e public) particularly) t-e pedestrian andve-icular tra!!ic and t-e adacent properties. Proper sa!ety !eatures s-all be designed to ma+esure t-at t-e demolition can be carried out sa!ely and t-e site personnel are protected. -eRegistered Specialist Contractor ?Demolition@ s-all carry out t-e demolition ,or+s includingprecautionary measures in accordance ,it- t-e approved plans and ot-er related documents)and provide continuous supervision to t-e ,or+s.

).2 *oa&%ing an% Co-e&e% Wa$/a0

-e primary purpose o! -oarding and covered ,al+,ay is to provide protection o! t-e publicduring t-e construction or demolition o! buildings. enerally) -oarding isolates t-e demolition site!rom t-e public) t-us preventing unaut-ori;ed access and trespassing. -e covered ,al+,ay) inconunction ,it- catc- plat!orm) provides additional protection to t-e pedestrian tra!!ic against!alling debris. -e Registered Pro!essional $ngineer s-all design t-em to suit individual sitecircumstances. Suggested designs !or -oarding) covered ,al+,ay and catc- plat!orm are listed int-e !ollo,ingA

).2.1 Re>#i&e'en! fo& *oa&%ing? Co-e&e% Wa$/a0 an% Cac P$afo&'

-e criteria !or use o! covered ,al+,ay !or a site depend on t-e -eig-t o! t-e building beingdemolis-ed and its proimity to t-e ve-icular andEor pedestrian tra!!ic. -e re'uirements !or-oarding) covered ,al+,ay and catc- plat!orm are described in t-e !ollo,ingA

&@ or buildings t-at -ave a clear space bet,een t-e building line and t-e lot boundary e'ualto or more t-an t-e building -eig-t ?-ereina!ter re!erred to as clear space@) only -oarding

s-all be re'uired

B@ Covered ,al+,ay s-all be provided !or building ,it- clear space less t-an t-e building-eig-t

C@ Covered ,al+,ay ,it- catc- plat!orm s-all be provided !or buildings ,it- clear space lesst-an -al! t-e building -eig-t. :o catc- plat!orm is re'uired !or building less t-an 4 m -ig-

D@ -e -oarding andEor covered ,al+,ay s-all be provided along t-e !ull lengt- o! t-e siteboundary adacent to public access.

$@ -e re'uirements !or -oarding) covered ,al+,ay and catc- plat!orm are illustrated inigure 3.1.

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).2.2 Di'en!ion!

& minimum vertical clearance o! 2.3 m s-all be provided !or t-e covered ,al+,ay. & minimumclear ,idt- o! 1.1 m is re'uired !or -oardingEcovered ,al+,ays sited on a carriage,ay. &s regards-oardingEcovered ,al+,ays on a !ootpat-) t-e clear ,idt- s-ould be related to t-e eistingpavement as set out in able 3.1. -e re'uired clear ,idt- must not be obstructed in any mannere.g. by tra!!ic sign) temporary supports) sca!!oldings or t-e li+e. -e ,idt- o! t-e catc- plat!orms-all not be less t-an 2 m ,-en it abuts a street and may be reduced by t-e amount o! set bac+o! t-e building. Separation distance bet,een t-e ,al+,ay cover and t-e catc- plat!orm s-all beindividually determined according to t-e design need) e.g. maintenance. & minimum clearance o!5.5 m s-all be maintained !or t-e catc- plat!orm ,it-in a minimum distance o! 5## mm !rom edgeo! a carriage,ay unless ot-er,ise agreed by t-e (ig-,ays Department. 5.5 m clear -eadroomover gantry s-all be maintained as !ar as practicable.

Ta7$e ).1. Wi% of Co-e&e% Wa$/a0

E;i!ing Pa-e'en Wi% Mini'#' C$ea& Wi% in Wa$/a0

2.5 m or less :ormally 1.5 m minimum. $emption may be Consideredi! t-e pavement is o! insu!!icient ,idt-

7ver 2.5 m to 3 m *idt- o! t-e pavement minimum o! #. m subect to amaimum o! 2 m

7ver 3 m 2 m

).2.) De!ign C&ie&ia

-e roo! o! t-e covered ,al+,ay s-all be designed to support a uni!ormly distributed load o! 5+Pa. -e catc- plat!orm s-all be designed to sustain a uni!ormly distributed load o! 5 +Pa or apoint load o! 2# +: acting on an e!!ective area o! 3## mm G 3## mm) ,-ic-ever s-all produce t-emost adverse e!!ect. Design criteria !or covered ,al+,ay and catc- plat!orm are summarised inable 3.2. -e -oarding) covered ,al+,ay and catc- plat!orm s-all be designed to sustain t-e,ind load. -e location o! t-e proposed covered ,al+,ay s-all be compatible to t-e eistingtra!!ic environment.

ypical details !or t-e catc- plat!orm and covered ,al+,ay are illustrated in igure 3.2.

Ta7$e ).2. De!ign C&ie&ia fo& Co-e&e% Wa$/a0 an% Cac P$afo&'

Unifo&' Di!&i7#e% Loa% Poin Loa%

Covered *al+,ay 5 +Pa #i&e'en

%aterial polyet-ylene

String diameter 1 mm

Plys 1/

%es- grid opening 2#mm

*eig-t 13# gEm2

D@ arpaulin

arpaulin s-all be lig-t ,eig-t and constructed o! !ire retardant materials.

-e !ire retardant c-aracteristic o! t-e tarpaulin s-all meet eit-er one o! t-e !ollo,ingre'uirements o!A

1@ Class B material as speci!ied in Britis- Standard 5/ or

2@ &ny e'uivalent standard criteria or testing.

)." Cacfan

).".1 Re>#i&e'en!

-e design intention o! t-e catc-!ans is to catc- small pieces o! building debris t-at passest-roug- t-e protective screen and net) and t-e catc-!ans are not designed to collect large pieceso! building debris ,-ic- s-ould -ave been collected by t-e protective screen or net. & small pieceo! debris could be disastrous a!ter gaining enoug- +inetic energy t-roug- !alling great -eig-ts.-us) a catc-!an s-all be installed at a vertical distance o! not more t-an 1# m belo, t-e ,or+ing!loor. & catc-!an s-all -ave a -ori;ontal etension o! 1.5 m !rom t-e eterior !ace o! t-esca!!olding. -e typical angle o! inclination s-all be 2#I to 45I !rom t-e -ori;ontal plane.Catc-!ans s-all be used only as precautionary measures and s-all not be used as temporarysupport !or any anticipated loads.

).".2 See$ Cacfan

-e steel catc-!ans are considered as temporary cantilevered structures ,it- steel !ramingetended !rom t-e building. -e use o! epansive anc-or bolts in erecting t-e catc-!an s-all beavoided as !ar as practicable since t-e anc-or bolt may be loosened by vibration generatedduring t-e demolition process. 6n t-e case ,-en anc-ors are used) t-ey s-all be appliedcautiously ,it- etreme care and not as a primary support. $treme care s-all be eercised inerecting and dismantling t-e catc-!an to avoid t-e structural components !rom accidentally !allingo!!. &ll t-e components o! t-e steel catc-!an s-all be supported) and securely !astened to t-eli!ting appliances or supporting structural element until t-e installation is completed. Catc-!an maybe constructed ,it- components o! pre!abricated steelEmetal sca!!old. Suc- use is particularly

,/


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compatible ,it- metal sca!!olds. -e design and installation o! catc-!an using pre!abricated metalsca!!old components s-all be in accordance ,it- t-e manu!acturerFs recommended criteria. &s !ar

as practicable) t-e components o! t-e catc-!an s-all be pre!abricated and !astened by bolt tominimise ,elding.

89I:UR; 6%6 < R;MO=;D>

,1


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).3 Te'po&a&0 S#ppo&!

).3.1 Gene&a$

&@ Re'uirements

emporary supports to t-e structure or t-e elements o! t-e structure beingdemolis-ed s-all be provided !or any or combination o! t-e !ollo,ing conditionsA

1@ ,-en t-e ,-ole or any part o! t-e structure is subected to ecess loadingderived !rom t-e demolition activities) movement o! po,ered mec-anical plantsor debris accumulation

2@ ,-en any part o! t-e structure or any element being demolis-ed is not sel!#i&e'en! on e Ope&aion of Mecanica$P$an on S#!pen%e% F$oo&

Design imposed load o! !loor tobe demolis-ed

3 +Pa 5 +Pa .5 +Pa 12.5 +Pa

%aimum ,eig-t o! mec-anical plant allo,ed

11)/## +g 11)/## +g 11)/## +g 11)/## +g

%inimum no. o! consecutive!loors re'uired to distributemec-anical plant loading)t-roug- propping

5 3 2 2

%inimum no. o! consecutive!loors re'uired to distributelocalised loading !romtemporary ramp) t-roug-propping

5 4 3 2

%aimum spacing o! steelprops in eac- direction

1.2m 1.2m 1.2m 1.2m

).3.4 E&ecion an% Di!'an$ing

&@ &ll temporary supports s-all be erected strictly in accordance ,it- t-e demolition plansandEor in accordance ,it- t-e manu!acturerFs recommendations ,-ic- s-all comply ,it-international codes or provisions ,-enever applicable. &ll pre


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).4 P&oecion of P&ope&ie!

).4.1 Gene&a$

Stability treatment s-all be provided to protect building elements t-at may be a!!ected by t-edemolition proect. -e design o! t-e bracing system s-all be based on a structural assessmentand engineering evaluation to provide necessary and su!!icient protection !or t-e a!!ectedproperties.

).4.2 Pa&0 Wa$$! an% E;e&na$ Wa$$!

Party ,alls t-at separate t-e adoining building and t-e demolition proect s-all remain and beprotected during and a!ter t-e demolition proect. Redundant party ,all s-all be removed as !ar aspossible. Demolition o! structural elements adacent to t-e party ,all or t-e eternal ,all o!adoining building ?-ereina!ter in section 3./.2 re!erred to as eternal ,all@ s-all be per!ormed bymanual met-od ,it- etreme care to prevent any damage to t-e party ,all or t-e eternal ,all.

-e party ,all or eternal ,all stabilisation and treatment s-all be applied on eac- !loorimmediately a!ter t-e said !loor is demolis-ed.

&@ *aterproo!ing

-e party ,all or eternal ,all s-all be protected against in!iltration and ,ater seepage,-en it is eposed to t-e ,eat-er. Roo! lines and ,all oints are more susceptible to ,aterlea+age problems and s-all be c-ec+ed !or ,aterproo!ing treatment. &ll loose bric+s or !illmaterials s-all be removed. &ll openings and voids s-all be !illed ,it- concrete.

1@ *aterproo!ing may be ac-ieved by cement mortar treatments. -e application o! t-ecement


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B@ Structural Supports

-e eposed party ,alls or unprotected eternal ,all may be temporarily supported by timber

ra+ing s-ores or installation o! sti!!eners consisting o! structural steel members ,it- concretecover or ot-er corrosion protective system as designed by t-e Registered Pro!essional $ngineer.6! structural conditions allo,) t-e stability o! t-e party ,all or t-e eternal ,all may be improved byleaving a portion o! t-e common beams and slabs ,-ic- are connected to t-e party ,all.

-e layout o! t-e temporary supports to t-e party ,all or t-e eternal ,all s-all be considered int-e ne, construction. Permanent support is re'uired to ensure continuity o! t-e party ,all supportand minimise any possible inter!erence. -e temporary ,all treatment s-all be maintained untilt-e application o! t-e permanent treatment ,-ic- may be incorporated in t-e construction o! t-ene, building.

).4.) Fo#n%aion S#ppo&

& t-oroug- evaluation s-all be conducted !or demolition involving basement) belo, groundstructures or any structure t-at may a!!ect t-e !oundation o! t-e adoining properties. &ppropriates-oring) underpinning or ot-er protective measures s-all be installed i! necessary. Details o! t-edemolition o! t-e underground structure s-all be re!erred to in 5.9.

).5 P&oecion of T&affic

).5.1 A%acen T&affic

&ny closure o! roads and ,al+,ays may seriously impact t-e tra!!icEpedestrian circulation andcause disruption to t-e public. -ere!ore) as !ar as practicable) t-e installation o! t-eprecautionary measures and t-e demolition operation ,-ic- causes any closure o! tra!!ic laness-all be avoided. 6! unavoidable) prior permissionE arrangement ,it- Royal %alaysian Police s-allbe obtained. emporary closure o! a tra!!ic lane may be considered !or nig-t ,or+. emporary

closure o! a tra!!ic lane may also be considered !or eceptional cases ,-ere t-ere are no ot-erpractical alternatives to sa!ely demolis- t-e building elements suc- as proected canopies)balconies or veranda-.

).5.2 T&affic Manage'en P$an

6! tra!!ic closure is necessary) a proper ra!!ic %anagement Plan s-all be submitted to t-e 0ocal&ut-ority !or t-eir revie, and approval.

).5.) Sie Acce!!

Sa!ety measures !or construction access to and !rom t-e site s-all be considered in a demolitionproect. Proper -eadroom) sig-tline) segregation) loadingEunloading location) illumination etc.

s-all be provided !or t-e protection o! ve-icular and pedestrian tra!!ic !rom t-e ingress and egresso! construction ve-icles.

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). Specia$ Safe0 Con!i%e&aion!

)..1 T&aining an% Co''#nicaion

Demolition ,or+ers) including plant or e'uipment operators) s-all go t-roug- proper ob sa!etytraining and be in!ormed o! t-e potential -a;ards by attending training sessions as ,ell as on#ip'en Mainenance

&ll e'uipment s-all be tested and eamined be!ore use. -ey s-all be properly stored andmaintained. -e e'uipment s-all be inspected daily and results o! t-e inspection s-all berecorded accordingly. & detailed sa!ety instruction s-all be provided to cater !or speci!ic situationso! t-e proect) i! necessary.

)..) E$ec&ica$ Safe0

& properly connected po,er source !rom a local electric utility supplier or a mobile electricitygenerator s-all be utili;ed in demolition sites.

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).." Fi&e

&ll !lammable goods s-all be removed !rom site unless t-ey are necessary !or t-e ,or+s involved.

&ny remaining !lammable goods s-all be stored in proper storage !acilities. &ll !urniture) timber)doors) etc. s-all be removed be!ore any ,elding ,or+ is per!ormed. ire !ig-ting appliances s-allbe provided and maintained in ,or+ing conditions.

)..3 Occ#paiona$ *ea$

-e -ealt- o! ,or+ers on site s-all be properly protected particularly on t-e !ollo,ing areasA

&@ $posure to Dust

B@ C-emical $posure

C@ (eat Stress and 8entilation

D@ :oise $posure

$@ %edical and irst &id acilities

@ Sanitation

@ 7ccupational Diseases and

(@ Poisoning.

)..4 E'e&genc0 E;i Re>#i&e'en! in De'o$iion Sie!

$mergency eits s-all be provided during building demolition. 6n case o! any emergency

evacuations) t-e emergency eit ,ill serve as a li!eline !or transportation o! inured ,or+ers. &minimum o! one eit route s-all be maintained and designated as t-e emergency eit at all timesduring t-e demolition. &de'uate lig-ting and !ire etinguis-ing e'uipment s-all be provided.$mergency eit s-all be properly protected) !ree o! obstruction) and properly mar+ed ,it- eitsigns or ot-er indications to clearly s-o, t-e route. &ll ,or+ers s-all be in!ormed about t-e eitroute.

)..5 :i7&aion

Demolition ,or+ ,ill cause vibration to neig-bouring buildings or structures to various etent)depending on t-e met-od o! demolition. -e most serious vibration is caused by implosion. -ee!!ect o! vibration caused by implosion are categorised as !ollo,sAD@ materials recycling!acilities !or processing into recycled products and aggregates !or bene!icial reuse. 6n t-e eventt-at bro+en concrete is mied ,it- some ot-er ,astes) bro+en concrete s-ould be sorted out onsite !rom t-e miture o! ,astes) be!ore disposal at a C>D materials recycling !acilities.

).1(.) D#! Mini'i+aion

o prevent dust generation during t-e debris -auling) ,ater spraying s-all be applied during t-e-auling process. (o,ever) t-e Registered Specialist Contractor ?Demolition@ s-all ensure propercontrol o! ,ater supply and !loor drainage system in order to avoid !looding ,-ic- is a nuisanceand may cause overloading o! !loors.

).1(." De7&i! Acc#'#$aion

6n general) t-e debris accumulation on t-e !loors is not allo,ed unless t-e debris accumulation isusti!ied by engineering calculations. Debris s-all not accumulate against t-e -oarding or eternal,all. $cessive accumulation o! debris may cause overloading condition and may induce lateralloading on t-e ,alls and s-all be avoided. -e propping design s-all include t-e debris loading.

).1(.3 De7&i! Di!po!a$ an% Manage'en S0!e'

o avoid accumulation o! debris and to ma+e sure t-at t-ey are disposed o!! promptly) RegisteredPro!essional $ngineer s-ould ensure t-at a debris disposal and management system is prepared

and implemented by t-e Registered Specialist Contractor ?Demolition@.

-e debris disposal and management system s-ould clearly lay do,n t-e !ollo,ing detailsA

&@ met-od o! -andling demolis-ed building debris

B@ t-e routing and movement o! debris !rom eac- !loor to on grade -olding area prior toleaving t-e site

C@ means o! transportation o! debris o!! site

D@ time and !re'uency o! debris disposal o!! site

$@ record sc-eme on t-e tonnage o! eac- truc+ load) truc+ license plate) driverFs name) triptic+ets and location o! dump site and

@ t-e site supervisory personnel responsible !or t-e debris management system.

).1(.4 De7&i! Loa%ing

6n t-e case ,-en loaders and truc+s -ave to ,or+ at ground !loor level) t-e !ollo,ing conditionss-all be consideredA

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&@ -e route o! loaders and truc+s s-all be c-ec+ed to avoid con!lict ,it- temporary proppingsupports

B@ -e ,or+ing -eadroom at ground !loor s-all be c-ec+ed) any local strengt-ening to suitremoval o! me;;anine !loor or ! irst !loor beams s-all be properly designed and

).1(.5 Wa!e Manage'en

7nD@ material is strongly recommendedso t-at inert material can be disposed o! at public !illing areas as !ar as practicable) and t-eremaining C>D ,aste disposed o! at land!ills. Suc- materials s-all be !ree !rom marine mud)-ouse-old re!use) plastic) metal) industrial and c-emical ,aste) animal and vegetable matter andot-er matter considered unsuitable by t-e illing Supervisor. Small 'uantities o! timber mied ,it-ot-er,ise suitable material may be permitted.

&ll construction and demolition materials arising !rom or in connection ,it- demolition ,or+ s-allbe sorted on#enc0

Site inspection s-all be per!ormed by t-e Registered Pro!essional $ngineer or -iseperienced and competent representative) to ensure t-at t-e temporary structures)catc-!an) catc- plat!orm and ot-er precautionary sa!ety measures are in good condition.

&ny movement) damage or distortion to t-e temporary structures s-all be identi!ied andrepaired) i! necessary.

-e Registered Specialist Contractor ?Demolition@ s-all per!orm a daily inspection toremove any debris accumulated on catc-!ans and catc- plat!orms. -e contractorFsrepresentative s-all provide !ull time continuous site supervision and c-ec+ t-e condition o!t-e demolition ,or+ including t-e unstable andEor partially demolis-ed structures andensure t-at t-ey are stable and sa!e eac- day be!ore leaving t-e site.

Regular inspection s-all also include preventive and protective measures adopted toprotect t-e ,or+ersF -ealt- suc- as dust suppression measures and personal protectivemeasures.

6n t-e case ,-en discrepancies !rom t-e %et-od Statement are discovered duringinspection) t-e inspector s-all report to -is senior) i! applicable) and +eep t-e Registered

Pro!essional $ngineer in!ormed o! t-e discrepancies. :o !urt-er demolition s-all be carriedout until recti!ication ,or+ -as been completed and ,ritten instruction to commence site,or+ is issued by t-e Registered Pro!essional $ngineer.

B Un!afe Con%iion

6! any unsa!e conditions are present) all demolition activities s-all be immediately -alteduntil t-e unsa!e conditions are recti!ied. &ll unsa!e condition s-all be reported to RegisteredPro!essional $ngineer !or !urt-er instruction.

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C Scaffo$%ing

6nspection and maintenance o! sca!!olding s-all be per!ormed by competent person

registered ,it- Department o! 7ccupational Sa!ety and (ealt-. -e sca!!old s-all not beused unlessA

i@ 6t -as been inspected by a competent person be!ore being ta+en into use !or t-e !irsttime

ii@ 6t -as been inspected by a competent person a!ter any substantial addition) partialdismantling or ot-er alteration

iii@ 6t -as been inspected by a competent person a!ter any eposure to ,eat-er conditionsli+ely to -ave a!!ected its strengt- or stability or to -ave displaced any part

iv@ 6t -as been inspected by a competent person at regular intervals not eceeding 14days immediately preceding eac- use o! it and

v@ & report -as been made and signed by t-e person carrying out t-e inspection in anapproved !orm containing t-e prescribed particulars ,-ic- include a statement to t-ee!!ect t-at t-e sca!!old is in sa!e ,or+ing order

).12 Po!8De'o$iion P&eca#ion!

7nce t-e demolition is completed) t-e site s-all be reinstated to eliminate any potential -a;ard tot-e public. -e !ollo,ing precautionary measures s-all be consideredA

&@ -e site s-all be levelled and cleared o! any debris. &de'uate drainage s-all be provided

B@ 6! t-e ne, development is not immediately commenced) t-e site s-all be completely

enclosed to prevent public trespassing

C@ Supports to adacent building structures) ,eat-er


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". MET*ODS OF DEMOLITION

".1 Gene&a$

-e c-oice o! demolition met-od depends on t-e proect conditions) site constraints) sensitivity o!t-e neig-bour-ood and availability o! e'uipment.

op do,n met-ods are applicable !or most sites) particularly !or t-ose situated in busy urbanareas. 7t-er mec-anical met-ods applied !rom t-e outside o! t-e building may be suitable !orproects t-at -ave su!!icient clear spaces. or structural proections) suc- as balconies) canopiesand veranda-s etending beyond t-e building lines) demolition by -and -eld tools or t-e cut andli!t process may be a sa!e solution. %et-ods using ,rec+ing ball and eplosive s-ould be adopted,it- etreme care ,-en ,ell planned ade'uate precautionary measures are provided. -eapplications o! demolition met-ods are summarised in able 4.1.

-e suggested procedures described in t-is Code o! Practice are recommended good practices!or demolition o! common structural elements only. $ac- site -as its speci!ic !eatures andconditions. -e met-od) including detail procedures) s-all be designed to accommodate t-especi!ic proect re'uirements. 6n general) demolition s-ould be carried out in t-e reverse order o!construction) as !ar as appropriate.

".2 Top Do/n Man#a$ Meo%

".2.1 Gene&a$

op do,n met-od discussed belo, is t-e met-od t-at proceeds !rom t-e roo! to ground in ageneral trend) t-ere are particular se'uences o! demolition ,-ic- may vary) depending on siteconditions and structural elements to be demolis-ed.

or rein!orced concrete buildings) ac+ -ammers are commonly used to brea+ do,n t-e concrete.

7y#ence

Demolition se'uence s-all be determined according to actual site conditions) restraints) t-ebuilding layout) t-e structural layout and its construction. 6n general) t-e !ollo,ing se'uence s-allapplyA

&@ &ll cantilevered structures) canopies) veranda-s and !eatures attac-ed to t-e eternal ,allss-all !irst be demolis-ed prior to demolition o! main building and its internal structures oneac- !loor

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B@ *-en demolis-ing t-e roo! structure) all li!t mac-ine rooms and ,ater tan+s at -ig- levels-all be demolis-ed in top do,n se'uence to t-e main roo! level. 6n demolis-ing t-eeternal ,all or parapet ,all) t-e procedure as stated in 4.2.4 s-all apply

C@ Demolition o! t-e !loor slabs s-all begin at mid span and ,or+ to,ards t-e supportingbeams

D@ loor beams s-all be demolis-ed in t-e order as !ollo,sA

1@ cantilevered beams

2@ secondary beams t-en

3@ main beams.

6n t-e case ,-en structural stability o! beams are a!!ected) e.g.) due to loss o! restraints)t-e a!!ected beams s-all be propped prior to loss o! support or restraint

$@ :on


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Ta7$e ".1 S#''a&0 of Gene&a$ Ca&ace&i!ic! of De'o$iion Meo%! (Continued)

.7


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Ta7$e ".1 S#''a&0 of Gene&a$ Ca&ace&i!ic! of De'o$iion Meo%! (Concluded)

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./


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&@ -e eterior ,all s-all be demolis-ed !irst) and detail is re!erred to in 4.2.4) $terior *alls)Beams and Columns

B@ &ny structure or dead load supported by t-e cantilevered system s-all be removed prior todemolis-ing t-e cantilevered slabs and beams

C@ -e concrete s-all be bro+en do,n gradually starting !rom t-e eterior edge o! t-ecantilevered !loor) ,or+ing in,ards and to,ard its supporting beams. igure 4.1 illustrates t-edemolition o! cantilevered slab

D@ -e cantilevered beam s-all be demolis-ed a!ter t-e demolition o! t-e connecting !loor slab.Demolition o! t-e cantilevered beam s-all not advance !urt-er t-an t-e !loor slab so t-at t-esupport !or t-e slab is al,ays maintained. igure 4.2 illustrates t-e demolition o! cantileveredbeam ,it- t-e slab and

$@ Sa, cut and li!t may be used to dismantle t-e cantilevered !eatures. -e slab s-all be cut intoa manageable si;e and li!ted a,ay. -e cantilevered beams s-all be cut and removed a!tert-e removal o! t-e slab load and any load supported by t-em. -e cut and li!t applications arediscussed in 4..3.

".2." E;e&io& Wa$$!? Bea'! an% Co$#'n!

A B&ic in8fi$$ Wa$$

1@ o avoid any potential -a;ard o! bric+s !alling out o! t-e building) all t-e bric+ in

2@ -e rein!orced concrete !raming can be dismantled by ta+ing do,n t-e individual beams andcolumns separately andEor by ta+ing do,n t-e !rame o! a bay bet,een t,o columns asdescribed in 4.2.4 B@) 4.2.4 C@ and 4.2.4 D@.

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B E;e&io& Bea'

-e eterior beam may be demolis-ed by gradually brea+ing a,ay t-e concrete or by dismantlingt-e entire beam section. Demolition o! t-e eterior beams is illustrated in igure 4.3 > 4.4 anddescribed in t-e !ollo,ingA

1@ *ire and ,inc- or ot-er systems s-all be used to secure t-e cross beam to ot-er structuralmembers

2@ -e concrete is !irst bro+en a,ay at bot- ends near its column supports to epose t-erein!orcement

3@ Rein!orcement s-all be cut at one end to allo, t-e beam to partially drop. -e ,ire s-allsa!ely ,inc- t-e beam do,n to t-e building !loor in a controlled manner and

4@ -e dismantling ,ould be completed by cutting t-e rein!orcement at t-e remaining end) andt-e beam ,ill t-en be lo,ered completely in a controlled manner.

C E;e&io& Co$#'n

$terior column may be demolis-ed by t-e !ollo,ing procedures and as illustrated in igure 4.5.

1@ -e top o! t-e column s-all !irst be secured to a structural member by ,ire and ,inc-

2@ Pre


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D@ $terior Rein!orced Concrete rame -e eterior rein!orced concrete !rame may bedemolis-ed in sections. -e demolition procedures are generally described in t-e !ollo,ingA

1@ or manual demolition) t-e optimum section o! t-e !rame to be demolis-ed s-all be a baybet,een t-e t,o adacent columns but s-all not be ,ider t-an 3 m

2@ -e !rame section s-all be secured to ot-er structural members ,it- ,ire and ,inc-be!ore disconnecting t-e !raming !rom t-e remaining structure

3@ Pre


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2@ :on


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".2.4 Ine&io& Bea'!

&@ 6nterior beam normally supports !loor slabs on bot- sides. -e supporting beam s-all not beremoved until all ot-er dead loads imposed on t-e beam are removed) including t-e slabssupported by t-e beam and

B@ -e dismantling o! interior or secondary beams is illustrated in igures 4.9 > 4.1#.

".2.5 Ine&io& Co$#'n!

6nterior column may be dismantled by pre


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B@ 0i!ting o! %ac-inery

-e mec-anical plant s-all be li!ted onto t-e roo! o! t-e building by t-e use o! mobile crane or ot-erappropriate means as approved by t-e Registered Pro!essional $ngineer. Prior to t-e li!tingoperation) propping s-all be installed on t-e !loors beneat- t-e roo! in accordance ,it- t-eapproved design. -e crane s-all be properly tested) eamined and operated. -e operating areas-all be bloc+ed o!! during t-e li!ting operation. &pproval !rom t-e Royal %alaysian Police s-all beobtained prior to t-e operation i! temporary road closure is re'uired.

C@ emporary Ramp Construction

-e mac-ine s-all descend do,n to t-e net !loor by means o! a ramp. -e ramp may be atemporary structure or ot-er appropriate design. -e slope o! t-e ramp s-all be no steeper t-at1.5 to 1 or as recommended by t-e mac-ine manu!acturer. emporary structure s-all be designedand constructed in accordance ,it- 3.5. Propping re'uirements !or t-e temporary access ramp arere!erred to in 3.5.5.

&s an alternative) t-e mac-ine may also be lo,ered to t-e net !loor by t-e use o! mobile crane orot-er appropriate means as proposed by t-e Registered Pro!essional $ngineer. Similarprecautionary means and procedures s-all be !ollo,ed as in 4.3.1 B@ above.

".).2 De'o$iion Se>#ence

Demolition se'uence s-all be determined according to t-e actual site conditions) restraints) originalbuilding layout and its construction. 6n general) t-e !ollo,ing se'uence s-all applyA

&@ prior to demolition o! internal !loors) all cantilevered slabs and beams) canopies) andveranda-s s-all !irst be demolis-ed

B@ t-e structural elements) in general) s-all be demolis-ed in t-e !ollo,ing se'uenceA

< slab

< secondary beams t-en

< main beams.

C@ mec-anical plant s-all descend !rom t-e !loors ,it- temporary access ramp) or be lo,ered tot-e net !loor by li!ting mac-inery or by ot-er appropriate means

D@ ,-en a mec-anical plant -as ust descended !rom t-e !loor above) t-e slabs and beams) int,o consecutive !loors may be demolis-ed by t-e mec-anical plant simultaneously. -e

mec-anical plant may ,or+ on structural elements on t-e same !loor and brea+ing up t-eslabs on t-e !loor above

$@ t-e ,all panel) including beams and columns s-all be demolis-ed by gradually brea+ingdo,n t-e concrete or by pulling t-em do,n in a controlled manner igure 4.11 illustrates t-etypical se'uence o! top do,n met-od ,it- mec-anical e'uipment.

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".).) Cani$e-e&e% Canopie! an% Ba$conie!

Demolition o! cantilevered canopies and balconies may critically a!!ect public sa!ety and must beper!ormed ,it- etreme caution. emporary supporting structures) catc- plat!orm andEor temporaryplat!orms s-all be placed directly underneat- t-e cantilevered canopies or balconies. Commonproblems related to cantilevered structure are discussed in 5.3. -e process o! demolition o! t-ecantilevered structures is described in t-e !ollo,ingA

&@ -e eterior ,all lin+ing t-e cantilevered structure or balcony s-all be removed !irst. -is is!urt-er discussed in 4.3.4A $terior *alls) Beams and Columns

B@ -e !loor slab and cantilevered beam may be demolis-ed in sections. Demolition o!cantilevered slab is illustrated in igure 4.12

C@ -e mac-ine arm ,it- ,ire passing t-roug- t-e slab section s-all be used to stabilise t-estructure ,-ile t-e cutting is per!ormed

D@ Cuttings may be per!ormed by ac+ -ammer or pneumatic -ammer !or t-e concrete and oy#ence of Ope&aion

-e Plan s-o,ing t-e proposed met-od used to demolis- t-e structure s-all include t-e!ollo,ingA

Descriptions o! t-e e'uipment to be used.

Speci!ic guidelines on t-e limitations o! t-e mac-ineFs operation suc- as travel area)

speci!ic distance !rom t-e building line and any area ,it- inade'uate support or limited-eadroom.

-e se'uence and proposed procedures !or t-e demolition.

Detail instructions !or demolis-ing special !eatures and critical areas t-at may impact on t-e

general sa!ety o! t-e public and on site personnel.

Speci!ic precautionary steps !or identi!ying t-ese !eatures.

3. P&eca#iona&0 Mea!#&e!

Speci!ication and construction details !or precautionary measures ,-ic- are essential to t-e proectsa!ety. -e type o! precautionary !eatures s-all be selected to best meet t-e re'uirements o! t-edemolition met-od and t-e site conditions. -e !ollo,ing !eatures s-all be included ,-erever it isnecessaryA

Covered ,al+,ays) catc- plat!orms and -oardings.

Sca!!olding and catc-!ans.

emporary supporting systems to support mac-ines ,or+ing on t-e building !loors.

emporary supports !or cantilevered structures and !or bracing ,ea+ened structural

elements.

Detailed design !or temporary support and protection o! any structure t-at may be a!!ected

by t-e demolition) suc- as party ,alls) or any attac-ed structures) ,-et-er t-ey are legal ornot.

6nspection and maintenance !re'uency !or t-e precautionary measures.

Support !or adacent retaining ,alls or slopes t-at may be a!!ected by t-e demolition.

4. De7&i! *an%$ing

& proposed plan !or conveyance o! debris) on site sorting and management) estimated

amount o! debris re'uired !or o!! site transportation.

5. Specia$ Safe0 Con!i%e&aion!

%eans o! emergency escape) and access route.

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%eans to reduce t-e dust) noise and vibration impacts.

Storage and -andling o! any !lammable material t-at may be used in t-e demolition

process.

Proper pac+aging) labelling and storage o! asbestosEc-emical ,aste generated in t-e

demolition process.

. T&affic

6! t-e proect involves any temporary closure o! tra!!ic) a ra!!ic management plan s-all be

submitted to t-e 0ocal &ut-ority.

6. Po!8De'o$iion A&&ange'en

Permanent treatment to party ,alls and stabilisation o! adacent structures.

Site security.

Stabilisation o! ecavation) i! any.

or sloping sites or sites ,it- retaining ,alls) additional arrangements !or sealing o!! ground

sur!ace) provide ade'uate drainage and stabilisation o! t-e slopes andEor retainingstructures.

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APPENDI= C

PRESTRESSED CONCRETE AND GUIDELINES FOR IDENTIFICATION

1. T0pe! of P&e!&e!!ing

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D@ 6! long span precast concrete construction is !ound) it is normally 'uite easily identi!ied) asointing bet,een precast units 'uite o!ten are visible ,it- even so!!it level. -e units may beprestressed.

$@ C-ec+ t-e edges o! t-e slab) along t-e perimeter o! t-e building) along t-e inside !ace o!stair,ells) elevator s-a!ts) duct s-a!ts) etc. !or signs o! post


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Anne; D

E=AMPLE OF DEMOLITION PLAN AND STABILIT, REPORT FORTOP DOWN MANUAL MET*OD

1. DEMOLITION PLAN

1.1 Te %e'o$iion p$an !a$$ con!i! of e fo$$o/ing p$an!

1.1.1 ig .1 Site Plan and &doining Site Conditions.

1.1.2 ig .2 ypical loor Plan and $isting Building 6n!ormation.

1.1.3 ig .3 $levation &.

1.1.4 ig .4 Demolition procedure and se'uence.

1.1.5 ig .5 Precautionary %easures.

1.1./ ig ./ ypical Support at Cantilever.

1.1. ig . ypical detail !or Party *all Strengt-ening.

1.2 In e ca!e of !$oping g&o#n%? e fo$$o/ing a%%iiona$ p$an! a&e &e>#i&e%

1.2.1 Plan s-o,ing adoining slopes) buildings) structures) utilities t-at may be a!!ected by t-edemolition.

1.2.2 Sections S-o,ing t-e slopes etc.

1.2.3 Supports to slopes) buildings etc. at eac- stage o! demolition.

2. STABILIT, REPORT

2.1 Te Sa7i$i0 Repo& of i! p&oec !a$$ con!i! of e fo$$o/ing

2.1.1 & Stability report to usti!y t-e sa!ety o! t-e eisting building during all p-ases o! demolition.

2.1.2 & structural c-ec+ ,it- calculation on t-e support o! t-e cantilevered slab bet,een gridlines& and B.

2.1.3 & structural c-ec+ ,it- calculation on t-e -oarding) covered ,al+,ay and catc- plat!orm.

2.1.4 & structural c-ec+ ,it- calculation on t-e strengt-ening o! t-e Party *all.

2.2 In e ca!e of a !$oping !ie? e Sa7i$i0 Repo& !a$$ inc$#%e e fo$$o/ing 8

2.2.1 Stability c-ec+ o! t-e adoining slopes) buildings) structures and utility ,-ic- may bea!!ected by t-e demolition) ,it- supporting calculations.

2.2.2 7ptional Structural and eotec-nical c-ec+s on any remedial measures to strengt-en t-eslope.

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Anne; ;

E=AMPLE OF DEMOLITION PLAN AND STABILIT, REPORT FOR TOP DOWN MET*OD B,

MAC*INES

1.( De'o$iion P$an

1.1 Te %e'o$iion p$an !a$$ con!i! of e fo$$o/ing p$an!

1.1.1 ig .1 Site Plan and &doining Site Conditions.1.1.2 ig .2 ypical loor Plan and $isting Building 6n!ormation.1.1.3 ig .3 $levation &1.1.4 ig .4 Demolition procedure and se'uence1.1.5 ig .5 Precautionary %easures1.1./ ig ./ ypical Support ?-is dra,ing is not s-o,n) it is similar to ig ./ in

&ppendi D@

2.( Sa7i$i0 Repo&

2.1 Te !a7i$i0 &epo& of i! p&oec !a$$ con!i! of e fo$$o/ing

2.1.1 & stability report to usti!y t-e sa!ety o! t-e eisting building during all p-ases o! demolition.

2.1.2 & structural c-ec+ ,it- calculation on t-e support o! cantilevered slab and beams bet,eengridlines 5 and /.

2.1.3 & structural c-ec+ ,it- calculation on t-e support to typical !loors catering !or t-e loadingdue to po,ered mec-anical plants.

2.1.4 & structural c-ec+ ,it- calculation on t-e temporary ramp design to allo, t-e descending o!t-e mac-ines.

2.1.5 & stability report ,it- calculation to usti!y t-e sa!ety o! li!ting o! t-e mac-ine to t-e roo!.

2.1./ & structural c-ec+ ,it- calculation on its -oarding) covered ,al+,ay) and catc- plat!orm.

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APPENDI= ;

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< 2$ ?? STR;;T 8S*;;T , O9 ,>

APPENDI= ;

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APPENDI= ;

Demolition "roced!res

'% :eneralThe b!ildin& shall be demolished by Top Down Method by Machine% The proced!res

or demolition o str!ct!ral elements by machine are as ollows 0 on pa&e :'3% Thecantilevered slab shall be demolished as shown on the drawin& 8The drawin&shall incl!de details similar to 9i&% .%'$ .%, H .%', in this Code o "ractice>$

'%, The demolition o cantilevered beams shall not commence !nless all slabs andwalls which are s!pported by the cantilevered beams are removed%

'%6 The demolition o slabs and beams shall be as shown on the drawin& 8Thedrawin&shall incl!de details similar to 9i&% .%/$ .%'- and .%'' in this Code o "ractice>$

'%. The demolition o col!mns and R%C% 9rames shall be as shown on the drawin&8Thedrawin& shall incl!de details similar to 9i&% .%3$ .%'6 H .%'. in this Code o"ractice>%

,% ;4cavator and its movement restrictions,%' ;4cavator o ?Y brand$ Model ',6$ or approved e)!ivalent$ e)!ipped with

brea(er orhydra!lic cr!sher shall be !sed% The total wei&ht o machine shall not e4ceed''$---(&$

,%, The movement o the e4cavator shall be restricted to within the area withade)!ate proppin&% The e4cavator shall not move into the ollowin& areas 08i> ithin , m rom the b!ildin& ed&e$8ii> within ' m rom any openin&s$8iii> any cantilevered str!ct!res%

,%6 Mar(in& shall be placed to clearly identiy the restriction or the movement o thee4cavator%

6% ;4terior wall;4terior walls o the cantilevered balconies within &rid lines 3 H 7 shall be demolishedby hand held tools% The concrete shall be bro(en down in small mana&eable pieceswith hand tools or pne!matic 5ac( hammer not heavier than 3- (&% The reinorcin&steel may be c!t o ater all the concrete are removed or when its s!pport is no lon&erneeded%

.% @itin& o e4cavatorThe e4cavator shall be lited on the roo within the desi&nated area where proppin&were installed% The litin& shall be perormed by tr!c( crane which is capable olitin& '6- ton load !p to a hei&ht o 7- m% Approval rom the "olice and TransportDepartment shall be obtained prior to the lane clos!re and litin& operation%

3% Demolition se)!ence3%' Roo

8i> The reinorced concrete water tan( and other incidental str!ct!res on theRoo shall be demolished$

8ii> The e4terior walls lin(in& the cantilevered str!ct!re shall irst bedemolished$ ollowed by the cantilevered slabs and beams between &rid lines 3 H 7$8iii> Demolition shall proceed with the roo slabs and secondary beams in the

ollowin& order 0SJ*6 $ SJ*. $ SJ9. $ SJ 96 $ SJ;. $ SJ#6 $ SJ D. $ SJD6 and SJ #.$8iv> The reinorcin& bar o the beams connectin& the e4terior walls to the

interior col!mns shall remain !ntil the demolition o the e4terior wall$

8v> The e4cavator shall proceed down onto the '-th loor by means o thetemporary steel ramp placed at slabs S< ds and S< es $3%, '-th 9loor

8i> The e4cavator shall contin!e to demolish the remainin& roo slabs$ walls$ theMain beams and col!mns$

8ii> Upon removal o all the beams$ col!mns$ walls and other str!ct!ral

elements

above the loor$ the e4terior walls below lin(in& the cantilevered str!ct!reshall then be demolished$ ollowed by the cantilevered slabs and beams

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between

&rid lines 3 H 7$

8iii> Demolition o the remainin& loor shall ollow the proced!res as described in3%' 8iii>$ 8iv> and 8v>%

3%6 1th 9loor and loors below8i> The process o demolition o the '-th loor shall be repeated or 1th loor

thro!&h &ro!nd loor$8ii> Ater demolition o the str!ct!ral elements above &ro!nd loor$ the&ro!nd loor

slab shall be bro(en !p$

8iii> The e4istin& pile cap and pilin&s below the e4istin& &ro!nd level shall remain%

9I:UR; :%. D;MO@ITION "ROC;DUR; AND S;KU;NC; 8S*;;T 3 O9 3>

APPENDI= ;

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APPENDI= ;

"R;CAUTIONARY M;ASUR;S 0

"rior to the demolition o the main b!ildin& str!ct!re$ the ollowin& preca!tionarymeas!res shall be carried o!t 0

'% Utilities disconnectionAll !tilities and services to the b!ildin& shall be terminated% The sewer and draina&econnections shall be pl!&&ed at the terminal manhole%

,% Covered wal(way and catch platorm8A> Covered wal(way and catch platorm shall be erected accordin& to the approved

plan by #!ildin& A!thority alon& the entire len&th o the property bo!ndaries on ??Street and the service lane% The covered wal(way and catch platorm o!ndationinstallation shall also comply with the conditions o the ;4cavation "ermit by the*i&hways Department i necessary$

8#> The carria&eway shall be located on ?? Street between &rid lines D H 9$ The catchplatorm alon& ?? street shall be e4tended !nderneath the entire area o the ' stloor cantilevered balconies%

6% Scaolds$ wor(in& platorms$ screens and catchans8A> Do!ble row scaolds with nets and tarpa!lin shall be erected to cover the entire

b!ildin&$8#> The installation o the scaolds$ wor(in& platorms$ nets$ tarpa!lin and catchans

shall be in accordance with the codes o practice on scaoldin& saety and the Code

o "ractice or Demolition o #!ildin&s$8C> #amboo catchans shall be installed aro!nd the b!ildin& at vertical intervals o nomore that '-m%

.% Temporary s!pport8A> "roppin& shall be installed to s!pport the operation o the mechanical plant and the

demolition activities% The proppin& re)!irements or dierent loor areas wereselected based on the recommendation o the Code o "ractice or Demolition o#!ildin&s% The proppin& Sched!le is s!mmariBed in 9i&!re :%3$

8#> The top and bottom s!pports o the props shall be ade)!ately sec!red% #racin&andGor lateral restraints in at least two directions shall be installed to prevent lateralmovement o the props% "roppin& shall not be removed !nless the s!pport or themechanical plant$ debris or other loadin& conditions or the demolition process isno lon&er re)!ired$

8C> A str!ct!ral steel access ramp shall be provided or the e4cavator to manoe!vredown the loor% The &radient o the temporary ramp shall not be steeper than 6-L oras recommended by the man!act!rer%

8D> A steel rame shall be placed !nderneath the balconies at 'G9 to s!pport the

cantilevered str!ct!res above% Steel proppin&s shall be installed on all loors!nderneath the cantilevered slabs and beams% Steel proppin& shall have a bearin&capacity o ,3 (N$ spaced at '%, m centre% The props shall be braced with lateralrestraints% The area !nderneath each e4ternal cantilevered str!ct!re to bedemolished shall be protected by a temporary platorm%

3% Debris handlin&3%' The steel sheds shall be dismantled% All trash$ !rnit!re$ timber$ door ramed$

windowsshall be removed rom the b!ildin&% Any salva&eable items shall be sorted andremoved separately$

3%, Debris shall be conveyed to the &ro!nd loor thro!&h the lit shats between &ridlines : H *% The areas near the lit entrance shall be barricaded% Appro4imately'23 c!% m o b!ildin& debris wo!ld be &enerated rom the demolition o each loor%Clearin& and transportation o debris shall be arran&ed to ens!re the ollowin&conditions are maintained at all time 08A> Acc!m!lation o debris in the lit shats shall not e4ceed ' m hi&h$8#> Temporary stora&e on the loors shall not e4ceed '-- mm above the

loors$8C> Debris acc!m!lation on the &ro!nd loor shall not e4ceed ' m above the&ro!nd loor slab$

8;> No debris shall be acc!m!lated on the cantilevered str!ct!res%3%6 Details o debris disposal and mana&ement system shall be s!bmitted to #D prior to

consent application as per the re)!irements in "NA" ,7/%7% Special site saety

7%' ;mer&ency e4itThe staircase between &rid lines : and * shall be !sed as emer&ency e4it ro!te% Thero!te shall be clear o debris at all time% Identiication si&ns andGor mar(s shall be!sed to clearly indicate the ro!te$

7%, 9ire prevention 9ire e4tin&!ishers shall be placed at a convenient location on each loor% All

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&asoline$lammable materials$ o4y&en and acetylene bottles shall be stored in a protected

area%

9I:UR; :%3 "R;CAUTIONARY M;ASUR;S 8S*;;T . O9 3>

"R;CAUTIONARY M;ASUR;S07%6 Trainin&

A competent trainer shall train all on site personnel% The trainin& pro&rammeshall incl!de the ollowin& 08A> An ind!ction co!rse at the be&innin& o the pro5ect to provide the

opport!nityor on site personnel to !nderstand the demolition proced!res$ site saetyr!lesand critical saety concerns o the pro5ect$

8A> Daily saety meetin&s to reinorce the saety concept$7%. D!st and noise

8A> D!st &enerated d!rin& the demolition shall be s!ppressed by sprayin&watercontin!o!sly d!rin& the brea(in& operation$

8#> All 5ac( hammers and e4cavator mo!nted brea(ers shall be e)!ipped withsilencer

attachments% The air compressor shall be s!per silence type% Demolition wor(shallnot be perormed within the restricted ho!rs rom '1-- hrs% to -2-- hrs% All dayand rom -2-- hrs% To '1-- hrs% On &eneral holidays incl!din& SUNDAY%Mobile aircompressor shall be placed on &ro!nd loor%

2% Maintenance H inspection2%' Inspection shall be perormed by the representatives o the A" and the RS;

on a wee(lybasis and contractor on a daily basis to ens!re that all the temporary str!ct!res$catchans and catch platorms are in &ood conditions% Any acc!m!lation o debrisshallbe removed% Any movement$ dama&e or distortion to temporary str!ct!res shall beidentiied and repaired$ i necessary% The inspection and repair activities shall berecorded and copied to the A"%

2%, Contractor shall also inspect the site$ daily$ to identiy any !nsae condition$s!ch asdama&e to the temporary s!pports or !nstables andGor partially demolishedstr!ct!ralelements% Any !nsae conditions shall be rectiied beore leavin& the 5ob site%

2%6 Inspection and maintenance o scaold shall be perormed in accordance withthe codes o practice on scaoldin& saety and the Constr!ction Site 8Saety>Re&!lations by the contractor%

7% ;mer&ency plan/%' ;mer&ency telephone n!mbers shall be posted in conspic!o!s locations% In case o

accident or emer&ency$ the contractor shall report to the "olice and 9ire ServicesDepartment or immediate assistance% The contractor shall also contact the A" andRS; immediately abo!t the incident%

/%, "rior to a typhoon warnin& or a ma5or storm event$ the ollowin& itemsshall beperormed 0

/%,%' All the temporary s!pports$ scaold$ screens and any loose materialsshall besec!red% The scaold shall be ta(en down to the prevailin& top levelo theb!ildin&$

/%,%' 9lammable materials shall be removed or stored in a protected area%/%,%, The e4cavator sho!ld be moved to a location with proper s!pport$

preerablyclose to the centre o the b!ildin&$

/%,%6 Any !nstable andGor partially demolished str!ct!re shall be completed% I it isnot practical to complete the demolition timely the !nstable str!ct!ralelementshall be braced and s!pported%

0ocal &ut-ority

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1% "ost demolition1%' The site shall be levelled and clear o debris$1%, I the new development is not immediate$ the property bo!ndaries shall be

properlyenclosed to prevent p!blic entrance$

1%6 Any dama&e to pavement$ ootpath and elements within the ri&ht o wayshall berepaired to its ori&inal conditions prior to the completion o the demolitionpro5ect%

9I:UR; :%3 "R;CAUTIONARY M;ASUR;S 8S*;;T 3 O9 3>

APPENDI= ;

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AC+NO@;D:;M;NTS

The committee which developed this Constr!ction Ind!stry Standard consists o theollowin& representatives0

Ir Sia *an SeeRam!seren 8Chairman> Constr!ction Ind!stry Development

#oard Malaysia

Ir Ram!seren Constr!ction Ind!stry Development#oard Malaysia

"!an Nor *amiBa ahar 8Secretary> Constr!ction Ind!stry Development

#oard Malaysia

;nci( *ari S!ndar R *ari Dass 8Secretary> Constr!ction Ind!stry Development#oard Malaysia

Dr Siva(!mar CS+ Technolo&y Sdn #hd

Ir "atric( C a!&!stin Association o Cons!ltin& ;n&ineers

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010 05Oct09 COP Demolition Works

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