The 2016 edition of the standard expands on and replaces both the previous 1975 CSA S269.1 (Falsework for Construction Purposes) and the 1992 CSA S269.3 (Concrete Formwork). By combining these two standards, the new edition aims to enhance readability and eliminate any redundant information. This consolidation likely streamlines guidelines and ensures consistency across falsework and concrete formwork practices in construction projects.
In Section 6 of the standard, which focuses on structural analysis and design, the standard delineates various safety factors (SF) applicable to both limit states design (LSD) and working stress design (WSD). Given that formwork systems utilize hardware and materials defined under both design methods, it’s imperative for formwork designers to be well-versed in both approaches. This requirement ensures that formwork designs adhere to the appropriate safety standards and accommodate the unique considerations of each design methodology. By understanding and applying the relevant safety factors from both LSD and WSD, formwork designers can effectively ensure the structural integrity and safety of construction projects.
Clause 6.2.2 of the standard underscores the requirement for a higher safety factor in formwork design, attributed to the repetitive use of formwork elements and the inherent uncertainties in field assembly and concrete placement processes, where variables such as concrete mix consistency, environmental conditions, and workmanship introduce unpredictability.