3rd October 2017

� Failures of Scaffold

� False work Failures

� Form work Bursting

� Trench Support Failure

� Hoarding Failures

� Can be expensive and result in fatalities and serious injuries

� Cardiff 2000

� Details

� 89 mph winds

� Should have been designed for 130 mph wind speed

� Design changed on site without consultation with designer

� 91 of the required 300 anchor ties installed

� Top 6m of scaffold had no fixings

� Principal contractor did not get design checked or check scaffold after installation

� No scaffold register

� No weekly inspections

� Took British Army 36 hours to make safe at a cost of £10M

� Railway closed for 5 days at a cost of £52M

� Cost Taylor Woodrow Construction a total of £65M

� Taylor Woodrow sold to Vinci

� Total HSE fines £320,000

BS 5975:2008+A1:2011

Code of practice for

temporary works

procedures and the

permissible stress design of

falsework

BSI Standards PublicationBSI Standards PublicationBSI Standards PublicationBSI Standards Publication

BRITISH STANDARD BS 5975:2008+A1:2011

Section 1: Section 1: Section 1: Section 1: GeneralGeneralGeneralGeneral

1 1 1 1 ScopeScopeScopeScopeThis British Standard gives recommendations and guidance on the procedural controls to be applied to all aspects of temporary works in the construction industry. It also includes guidance on design, specification, construction, use and dismantling of falsework. This standard gives guidance on permissible stress design of falsework. This guidance is also applicable to the design of what is termed class A falsework1) in BS EN 12812:2004, the design of which is specifically excluded from BS EN 12812:2004.

Section 2 gives recommendations for the procedures required to ensure that temporary works are conceived, designed, specified, constructed, used and dismantled all in a safe and controlled manner.Section 3 covers the design of temporary works and in particular the design of falsework and relevant formwork. In addition Section 3 covers: materials including material factors; loads and load factors; design of falsework, including both proprietary equipment and traditional scaffolding solutions; wind loading (reference to temporary and permanent stability) and reference to other British Standards for the design of structural steelwork, reinforced concrete and excavation support.The structural design element in this standard is additional information necessary for the structural design of falsework. It can be used in conjunction with existing structural standards.

Principal Contractor� Designated Individual� TWC� TWS

Contractor � TWS

Temporary Works Designer� Liaise with TWC and provide solution based on the design brief

� Temporary works is an engineered solution used to support or protect either an existing structure or the permanent works during construction, or support an item of plant or equipment, or the vertical sides or side-slopes of an excavation during construction operations on site or to provide access

� Every organisation involved in temporary works must have a designated individual (DI)

� Establish and implement procedures in their organisation

� Ensure contractors have adequate procedures if they are carrying out and managing works

� Appointed by DI of the Principal Contractor

� Must be experienced (Competent)

� Design brief to designer

� TWC responsible for ensuring the design is implemented on site

� Provides Assistance to the TWC

� Appointed by Principal Contractor or contractor

� May be several TWS’s on a project

� Permit systems – Load, Strike

� Serves as starting point for subsequent decisions, design work, calculations and drawings. All concerned with the construction should contribute towards the preparation of the brief

� Collated by the TWC from various sources and will include details of permanent works and construction programme

� Forward to temporary works designer

� Competent designer provides information, drawings, calculations etc.

� Four categories of design check required depending on complexity of temporary works

� Standard solutions may be used such as trench boxes

CSkills Courses Available

� TWC 2 Day Course

� TWS 1 Day Course

� TWA 1 Day Course

� MSc in Temporary Works, University of London