Temporary Works (TW) may be deﬁned as engineered solutions designed by (or on behalf of) the contractor to allow or enable the permanent works to be constructed safely and without harming the environment by providing protection, support, or means of access / egress.
Usually, temporary works are removed after use, though in some circumstances, the TW may be incorporated into the permanent works, for example as sacriﬁcial formwork. For the safety and wellbeing of workers, it is very important that the same degree of care and attention is given to the design and construction of temporary works as for permanent works. Even relatively simple temporary works may require careful consideration in their design, construction, commissioning, inspection, and loading. An apparently simple temporary works task could lead to failure and potential injury if not correctly executed.
A CIF Working Group comprising of member representatives and recognised subject matter experts recently finalised CIF Guidance for the ‘Management of the Design of Temporary Works’. The publication may be accessed through the CIF webpage: https://cif.ie/download/cif-management-of-temporary-works-design/
A brief summation of the guidance is as follows:
- It is recommended that the duty of ensuring that all the relevant procedures and checks are carried out be given to an individual known as the ‘Temporary Works Co-ordinator’ (TWC). A TWC should be appointed by the PSCS, or the PSCS is to facilitate the appointment of a TWC.
- The Project Supervisor Design Process (PSDP) should detail in the Preliminary Safety and Health Plan the temporary works that are envisaged for the project, so far as is reasonably practicable.
- The principles of British Standard, ‘BS5975:2019, Code of practice for temporary works procedures and the permissible stress design of falsework’ should be adopted.
- Classification of temporary works (0,1,2,3) is recommended. If a contractor has adequate procedures in place for designing and checking of basic temporary works, then Temporary Works Design Certiﬁcates may not be required for Class 0 and 1. Use of Temporary Works Design Certiﬁcates is envisaged for Classes 2 and 3.
- All temporary works designs should be independently checked. The degree of checking should be related to the scale of the temporary works. A simple scheme may be checked by someone in the same organisation or on the same project, whereas a more complex scheme might have to be checked by an external entity not involved in the initial design.
- Work should be directed, supervised and checked to ensure that the temporary works are constructed safely in accordance with the agreed design and sequence using materials of agreed quality. Only when all checks have proven to be satisfactory are temporary works to be used (loaded) and removed from use (unloaded), in accordance with an agreed procedure.