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Open Publications - Produced by TWf

TWf endeavours to provide contemporary guidance on a range of issues associated with temporary works.

  • Principles for the management of temporary loads, temporary conditions and temporary works during the construction process (10.9.17)

    ‘Temporary works’ is a widely used expression in the construction industry for an engineered solution which is used during the construction process to provide support, restraint or access. It tends to exclude machinery and plant when used in standard configurations, but does include bespoke equipment, support to plant and modifications to plant that are specific to the project. Read More »


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  • Rebar collapse: TWf Press Release (25.5.17)

    Stability of reinforcement cages prior to concreting. Many do not realise that rebar cages can be dangerous, or that buckling can occur suddenly. Also, that cages built in-situ can become progressively less stable as work progresses; something that can be counter-intuitive. The risk can be high. The Temporary Works Forum (TWf) has a safety bulletin aimed at those specifying, managing, designing, detailing and installing reinforcement cages – whether this is permanent works designers or contractors – and seeks to draw attention to some key issues in ensuring stability and thus safety. Read More »


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  • Principal Designer: Guidance on Temporary Works (Jan 2017)

    The TWf has published guidance on the role of the Principal Designer (in CDM2015) with respect to temporary works. Read More »


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  • Role and Responsibilities of the PWD

    An expanded version of a paper published in The Structural Engineer


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  • ISE/TWf Evening Meeting (March 2016)

    Temporary works: Yours, mine or ours? A short presentation by Martin Thorpe and Phil Cantrell, Mott MacDonald


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  • ISE/TWf Evening Meeting (March 2016)

    Temporary works: Yours, mine or ours? Polling results - Part of the short presentation by Martin Thorpe and Phil Cantrell, Mott MacDonald


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  • ISE/TWf Evening Meeting (March 2016)

    Temporary works: Yours, mine or ours? A short presentation by David Lambert, Kier


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  • TWf Information Sheet No. 2 (Jan. 2016)

    This information sheet has been prepared to clarify the current status and recommendations for both management and technical training in temporary works in the UK construction industry.


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  • Design of granular working platforms for construction plant (Oct 2015)

    Temporary granular platforms for construction plant (including haul roads and general hard standings) are a necessary feature of almost all construction sites but the need to ensure that they are adequate for the intended use is often overlooked. Furthermore, the design is frequently only derived from previous experience. This has, on occasions, resulted in significant incidents of over-turning plant that result in, at best, cost and delay or, at worst, injury and/or death. Read More »


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  • CE marking and temporary works (Oct 2015)

    The Construction Products Regulation (2011) replaces the Construction Products Directive (1998). The CPR (2011) requires many products and items used in construction to be CE marked. This information sheet concludes that CE marking is not required for items used as temporary works: provided they are removed from the permanent works as a part of the construction process; or, if they are left in place: they play no part in the permanent works functions; nor can their presence have an effect on the performance of the permanent works in regard to one of the seven ‘Basic Requirements for Construction Works’.


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  • TWf Publications (Oct 2015)

    A list of TWf publications and other publications/courses endorsed and supported.


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  • Safety Bulletin: Stability of reinforcement prior to concreting (Oct 2015)

    At its meeting on 23rd September 2015 the Temporary Works Forum (TWf), in discussing the issue of rebar instability, identified that industry custom and practice in the measures taken to ensure the stability of reinforcement prior to concreting are changing. The TWf has undertaken to update its own guidance (TWf2013:01). In the meantime, as an interim measure, this Safety Bulletin aims to highlight key issues for all parties to consider. The ultimate aim is to save lives and reduce injuries. Read More »


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  • Clients' guide to temporary works (January 2015)

    TWf2014:02, Clients' guide to temporary works: Recommendations for Clients, their representatives, programme managers and others on the design and coordination of temporary works. Temporary works are often a significant part of a project’s construction cost, sometimes 50% or more. Even for simple schemes efficient design, management and installation will radically improve project delivery. A temporary works failure on a project is almost always a high consequence event and may be reportable. A significant failure may be catastrophic to budget, programme and reputation as well as to safety; such a failure will bring into question a client’s ability to procure and may lead to criminal prosecution, as (inter alia) they may be perceived to have failed in their duty to employ organizations of sufficient competence. The Guide has been written at the request of a group of clients, which approached the Temporary Works Forum. These clients were aware of the risks and, in some cases, the lost opportunities to their enterprises that temporary works present, but felt disadvantaged because they had insufficient insight into the processes at work in temporary works management. Read More »


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  • TWf Flyer (January 2015)

    Some information about the TWf and why you might like to join.


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  • The use of European Standards for Temporary Works design (Nov 2014)

    TWf2014:01, The use of European Standards for temporary works design. Historically, the majority of temporary works in the UK have been designed to British Standards using permissible stress methods. The harmonization of European structural design codes has led to the withdrawal of many of these documents and a change to a limit state approach. Although there is a great deal of published guidance for the Permanent Works Designer, very little is available for the application of European Standards to Temporary Works. In order to assist all interested parties, and foster a common approach, this guidance note provides a comprehensive background to the subject and makes general recommendations on the application of European Standards to Temporary Works. The Temporary Works sector is currently in a state of transition and unless specified by the contract a designer is free to choose a suitable method of design.


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  • Addendum: Stability of Reinforcement Cages Prior to Concreting (Oct 2014)

    Query: A query has been raised seeking clarification of Table 3 in TWf2013: 01. Comment: There is the potential that the failure mechanism is the failure of the top horizontal section of the reinforcing bar with a centrally placed distribution bar. The bending moment needs to be considered in this section based upon the length (dimension A on shape code 98) and a moment, taken as PL/8 for an encastré member with a mid-span point load. Accordingly, the guidance note will be updated when next revised.


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  • Stability of reinforcement prior to concreting (Oct 2013)

    A key consideration prior to concreting is to ensure that the reinforcement cage is stable under foreseeable conditions. Instability can cause fatality, or injury, but will also delay the works. This guide provides practical advice for those with responsibility for designing, managing or supervising this process.


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  • Site hoardings (April 14)

    Site hoardings are a ubiquitous but essential element of most projects. It is important to ensure they are procured, designed, constructed and maintained appropriately (Revised: December 13).


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  • Competencies of the TWC

    The Temporary Works Co-ordinator (TWC) is a key player in the construction process. This note sets out recommended competencies for those undertaking this role.


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  • Design management of temporary works

    This note sets out a number of key requirements regarding the design and contract management of temporary works, to be considered by the permanent works designer.


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  • Differences between permanent and temporary works (Aug 13)

    There are some important differences between permanent works and temporary works. It is necessary to be aware of these when designing the latter. This paper identifies some of the key issues.


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  • Training template for Permanent Works Designers

    This note sets out the essential elements of a training Module for Permanent Works Designers to enable them to appreciate the issues relating to temporary works.


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