Guidelines on Safety of Tower Cranes

1

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Disclaimer

This publication is prepared by the Construction

Enquiries

2

Guidelines on Safety of Tower Cranes

Publication No. 1


A. Purpose

3

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

C. Introduction

For the avoidance of doubt, notwithstanding such intention, this publication is issued by CIC for reference by industry stakeholders only and will not constitute professional advice on tower crane operations or any other issues. The parties using this publication should therefore seek appropriate advice from their professional advisers. CIC (including its members and employees) will NOT accept responsibilities for any consequences resulting from the use of or failure to use this publication.

4


D. Measures for Enhancing Safety of Tower Cranes

E. Checking before Erection of Tower Cranes

(i) Pre-delivery checking

(ii) Checking of anchorage

(iii) Checking of supporting structure

5

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

(iv) Derrick crane

F. Improvements of Site Supervision

(i) Appointment of supervising engineer

and

(ii) Risk Assessment

6


7

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

(iii) Pre-installation checking

(iv) Pre-operation checking

8


1

I. Summary of Recommendations

1

9

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Procedures for Pre-Delivery Checking

Purpose

Engagement of CME

Provision of Documents by the Owner

10


Non-destructive Tests

11

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

1. Particulars of Tower Crane

12


Tie bar Tie bar Tie bar

1 2 3 6

Tower mast sections

Jib Trolley

E F F F F

13

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Item Main components QtyOwner’s Manufacturer’s

codeMain dimensions Year Remarks

1 Q200

2

/ chassis

3 Tower mast sections 1 M1

1 M6 Base section,

1 M1

1 T1 A202

6 1 C1 12m

Jib

1

Type F

1 Type E 2 tonnes each

1

1 Trolley

10 1 H1

11 Trolley 1 T1

12 1 TC1

14


THOROUGH EXAMINATION OF CRITICAL PARTS

15

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Section Description Page

Introduction

CONTENTS

16


1. INTRODUCTION

3. VISUAL EXAMINATION

17

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Critical parts Acceptance criteria Condition acceptable

Yes No Remarks

3.1 Main structural parts

_________________

_________________

_________________

_________________

(c) Tower mast sections

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

18



Yes No Remarks

3.2 Accessories

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

19

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

4. DIMENSIONAL EXAMINATION


Yes No Remarks

(a) Mast section connections

_________________

_________________

(b) Jib section connections

_________________

_________________

(c) Tie bar connections

_________________

_________________

20


The repair and maintenance record prepared by the tower crane owner should include


Yes No Remarks

_________________

(b) Motors

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

_________________

21

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

6. SUMMARY OF FINDINGS

The critical parts listed below are not in acceptable condition, and are required

Critical part Details of non-conformance

(a) _____________ _________________________________________

(b) _____________ _________________________________________

(c) _____________ _________________________________________

6.2 Maintenance logbook

is not

Critical part

(a) ___________________________________________

(b) ___________________________________________

(c) ___________________________________________

22


6.3 Non-destructive test reports

(a) Bolts and pins

Yes

__________________________________________________

Yes

__________________________________________________

23

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Report for Risk Assessment

Purpose

Overview

(A) Introduction

(B) Hazard assessment

24


(C) Method statement

25

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

(D) Personal particulars of crew members

(E) Manufacturer’s Manual

26

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Possibility(P)

Mild(1) Residual

Public(P)Action

May be Possible(3) P*C

Asset(A)

Impossible(1)

Required

SAMPLE

tower crane

3 12

Mechanic

mast to tower crane

to mast)

3 12

27


3 12

3 12

3 12

arrest strips

3 12

stripst

3 12

3 12 Foreman

28

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

equipment (PPE)

3 12

3 3

materials and to choose a suitable and

materials suitably and less than 2 metres

6(3x3) Foreman

3 12

3 12

weather report) when wind speed exceeds

3 12

suitable control rope and monitor the use

Possibility(P)

Mild(1) Residual

Public(P)Action


Asset(A)

Impossible(1)

29


(2) Commencing works procedure

3 12

properly, and then hammer the 3 12

3 12

To install two mono-rails at the 3 12

3 12

30

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

3 12

3 12

3 12

Possibility(P)

Mild(1) Residual

Public(P)Action


Asset(A)

Impossible(1)

31


3 12

3 12

them in the correct position and to start

tower crane to hoist mono-rail to

3 12

3 12

the mast, and then hammer out

3 12

32

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

chassis and dismantle the telescopic 3 12

them in the correct position and to start

appropriate positions and hammer

3 12

3 12

Possibility(P)

Mild(1) Residual

Public(P)Action


Asset(A)

Impossible(1)

33


3 12

3 12

the site to carry out the tests and

3 12

3 12

34

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

(3) Completion of works

procedure

not properly put away, and a tower crane is

3 12

(4) Emergency

3 12

there is the need to send casualties to

Possibility(P)

Mild(1) Residual

Public(P)Action


Asset(A)

Impossible(1)

35


36


1A

1B

1C

1E

1F

2

3 60000 mm

2130 mm

6

mast 6000 mm

mast 6000 mm

mast 6000 mm

10 mast 6000 mm

11

Sample Method Statement for Dismantling of Tower Crane

37

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Sample Layout Plan

Tower crane

38


Important Points

Hand tools must be tied to the appropriate

position with a rope

Sample Tower Crane Dismantling Procedures

Basement

Hydraulic 2 m

10 m

For the purpose

not dismantle

ballast

39

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Important Points

maintained with the tower crane

wire rope

the tower craneHand tools must be tied to the appropriate



40


Basement

Hydraulic

Control rope

21 m


41

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Important Points



so as to maintain a correct central

42


Important Points




10 m

Basement

Hydraulic21 m

43

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es


11 m

Basement

Control

rope Control

rope

Hydraulic21 m

44


Important Points



45

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Important Points




Basement

Hydraulic

46


Important Points




Basement

Hydraulic

47

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Important Points

operate the oxy-acetylene torch

Fire/explosion


End

48


PostContact

Telephone

Competent

Person

Up on the

tower crane

Sample Appointment Letter of Competent Persons

of Tower Crane Dismantling

49

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

Crane

Experience

Junior

Junior

Post

50


Crane

Junior

Post

51

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

of Site Personnel Engaged in Tower Crane Operations

Competent Person

(A) Role

(C) Experience

(D) Training

52


(E) Competencies

Senior workman

(B) Experience

(C) Training

53

Gu

idelin

es on

Sa

fety o

f To

wer C

ran

es

(B) Training

(C) Supervision

54


1

Summary of Recommended Improvement Measures

(i) Tower crane owners

publication

(ii) Tower crane owners

Principal Contractors publication

(iii)

structure

Tower crane owners

Principal Contractors publication

E Checking before Erection of Tower Crane

F Improvement of site supervision

(i) Principal Contractors

publication

(ii)

method statement

Principal Contractors Already

implemented

(iii) Principal contractors

publication

Principal contractors

publication

Principal contractors Already

implemented

G

contractors

Principal contractors

publication

H

of competent persons

and workmen

Principal contractors Already

implemented1

Section and

subsection

in main Improvement Measures Implementing parties

Implementation

timeframe