Temporary Works
Temporary Works
•
•
•
•
What do we mean by Temporary Works?
Why is it important ?
What can go Wrong?
What do you need to know?
Definition of Temporary Works
An engineered solution used to :
support or protect an existing structure
or the permanent works during construction,
or
to support an item of plant or equipment,
or the vertical sides or side-slopes of an excavation,
or to provide access.
Typical Forms of Temporary Works
Hoardings
Façade Retention
Piling
Propping
Working
Platforms
Aluminium
HD
Shoring
Ground
works
Column
Forms
Wall
Forms
Refurbishment
Mast Climbing Platforms
Scaffolding
Edge
Protection
Size
• There is no official determination of what size of
project needs a formal Temporary Works Procedure
• Risk is the main factor
• The policy requirements of BS5975
may, however, be applied to small jobs
in principle .
Why Is TW important?
• History is repeating itself with incidents
• The supply chain is more fragmented into numerous subcontractors
• Fewer main contractors now have their own temporary
works department
• Proprietory systems are now widely used, and the design
skills and product knowledge sits largely with the
specialists.
• Sometimes conflict between finance and safety
• BS5975 now gives clear guidance
on procedures and responsibilities.
Common Problems With Temporary Works
•
•
•
•
•
•
•
No procedure, TWC or responsible person.
Lack of a competent contractor
No temporary works equipment available!
Inappropriate use of TW equipment
Incorrect estimation of loads to be supported.
Inadequate lateral bracing to resist lateral (wind) loads.
Lack of knowledge and experience of persons involved in
temporary works design and erection/maintenance.
• Unauthorised changes to an approved temporary works
design.
Still Going Wrong?
•
“Three cranes dismantled whilst foundations checked and strengthened”
•
“Demolition contractors damaged gas main causing major leak”
•
“Reversing Tipper Truck struck Groundworker”
•
“Workman trapped as building collapsed during demolition”
•
“Member of public injured after fall into excavation”
•
“Inadequate support for floor decking caused collapse”
•
“HSE prosecute over fall risks discovered ”
•
“Ground worker escapes death in 4m deep excavation”
•
“Large fine follows failure to ensure contractor planning and control”
•
“Developer failed to inspect and maintain sign on major London project”
Source: PP Construction Safety
Still Going Wrong ?
11
Prevention
Temporary Works Co-Ordinator
“ The appointment of a temporary works
co-ordinator ( TWC)
should be the first operation in a chain of events culminating in
the construction of a temporary works scheme”
“ The TWC should be the first point of contact between the
designer and the site team, in all instances”
BS5975: 2008 Code of Practice for temporary work procedures and the
permissable stress design of falsework.
14
Temporary Works Co-Ordinator
Competencies Required of a TWC:
•
•
•
•
•
Engineering knowledge and understanding
Management and leadership
Independent judgement
Health, safety and welfare
Interpersonal skills and communication
And
•
Experience appropriate to the complexity of the project
temporary works procedures and issues associated with the type of
temporary works
Source: Temporary Works Forum
Temporary Works Co-Ordinator
Role includes:
Co-ordinate all temporary works activities
Ensure :
•
a temporary works register is established
•
•
•
•
•
a design brief is prepared
a satisfactory temporary works design is carried out
changes are managed
checks are made
a permit to load and unload is issued
Supervisors
• Assist and liaise with the Temporary Works Co-ordinator
• Supervise and check the temporary works
Supervise:
The erection/installation
Use
Maintenance
Dismantling
• Liaise with TWC re any changes or modifications
What do you need to know?
• Legal requirements: CDM, WAH, HASWA,LOLER
etc.
• BS5975 Code of Practice for Temporary Works
Procedures
• HSE SIM: The management of temporary works in
the construction industry
• Relevant Codes of Practice and industry guidance
for : Hoardings, Formwork & Falsework,
Scaffolding, Excavations, Working Platforms, Edge
Protection etc.
What Should You Do?
“Plan, manage and monitor the
construction phase in a way which
ensures that, so far as is reasonably
practicable, it is carried out without
risks to health and safety”
CDM Regulations
Considerations
Double- check your procedures?
for:
• Design Briefs
• Design changes during construction
• The checking of the structure
• TWC’s ability to spot scaffold hazards
• Signing off the Permit to Load
Be in a position to respond to
these questions……….
Steve Parncutt, HSE Specialist Inspector, ICE , Nov 2012
Temporary Works
Definitions
•
•
•
•
•
•
•
•
•
Back Propping
Stop End
Dywidag
Lacing
Angle of Repose
Characteristic strength
Alsi percha
Class ‘A’ System
Node Point
•
•
•
•
•
•
•
•
•
AGR’s
Bending Moment
Top restraint
Residual Risk
A-Frame
CFA
Soft Spot
Drag Box
Designated Individual
27