This guideline has been developed to provide information to engineers; contractors and others involved in the design, erection and use of false work and Formwork. For specific regulatory requirements regarding false work and framework, please consult the Construction Safety Regulations, adopted under the Workplace Safety and Health Act.
Engineering Design Requirements
Contractors must determine if form work/false work that is to be used on a project requires design work by an engineer. The following types of concrete Formwork and false work require the provision at the job-site of design and erection drawings and necessary supplementary information signed and sealed by a professional engineer.
Some engineers may choose to design only the Support false work portion of a form work system or a specific portion of the whole project. This must be made clear to contractors and so specified in all relevant drawings and documents. Statements such as "THIS IS NOT A FORMWORK DRAWING REQUIRED BY W.S.H. MR 189/85 “ written in the large print of a drawing should prevent the possibility of any misunderstanding. False work and Formwork design drawings need not be submitted to the Branch for approval or retention, but must be available at the project site.
The design engineer must authorize any revisions or changes to a false work structure. The engineer should ensure that written authorization is immediately available at the job-site, to be followed by proper documentation as soon as practicable.
Codes and Standards
CSA Standard S269.1 "False work for Construction Purposes" deals only with the design and erection of false work and specifically excludes forms.
The practice of noting on the drawings: "FORMWORK IS THE RESPONSIBILITY OF CONTRACTORS," or "BLOCKING BY OTHERS," is not acceptable. Form work designers are
expected to show details of forms and all associated connections, blocking, braces and ties that
are necessary to ensure form work integrity during erection and concrete placement.
The CSA Standards 086, S16, S157 and A23 continue to provide the basis for Formwork
compliance. ACI Sp4 and ACI Standard 347 are recommended as reference and guides for form
work designers.
Where there are discrepancies between the regulations and the standards, the overriding or
qualifying requirements of the regulations prevail.
Engineering Design Requirements
Contractors must determine if form work/false work that is to be used on a project requires design work by an engineer. The following types of concrete Formwork and false work require the provision at the job-site of design and erection drawings and necessary supplementary information signed and sealed by a professional engineer.
Some engineers may choose to design only the Support false work portion of a form work system or a specific portion of the whole project. This must be made clear to contractors and so specified in all relevant drawings and documents. Statements such as "THIS IS NOT A FORMWORK DRAWING REQUIRED BY W.S.H. MR 189/85 “ written in the large print of a drawing should prevent the possibility of any misunderstanding. False work and Formwork design drawings need not be submitted to the Branch for approval or retention, but must be available at the project site.
The design engineer must authorize any revisions or changes to a false work structure. The engineer should ensure that written authorization is immediately available at the job-site, to be followed by proper documentation as soon as practicable.
Codes and Standards
CSA Standard S269.1 "False work for Construction Purposes" deals only with the design and erection of false work and specifically excludes forms.
The practice of noting on the drawings: "FORMWORK IS THE RESPONSIBILITY OF CONTRACTORS," or "BLOCKING BY OTHERS," is not acceptable. Form work designers are
expected to show details of forms and all associated connections, blocking, braces and ties that
are necessary to ensure form work integrity during erection and concrete placement.
The CSA Standards 086, S16, S157 and A23 continue to provide the basis for Formwork
compliance. ACI Sp4 and ACI Standard 347 are recommended as reference and guides for form
work designers.
Where there are discrepancies between the regulations and the standards, the overriding or
qualifying requirements of the regulations prevail.
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