Wrapping up the Concrete Society of Southern Africa’s roadshow seminar on the transition from SANS 10100 to the new SANS 51992 1 1 well-known consulti
Wrapping up the Concrete Society of Southern Africa’s roadshow seminar on the transition from SANS 10100 to the new SANS 51992 1 1 well-known consulting engineer, Jack Huang of Zutari, detailed account of what the shift means for South African consulting engineers.
According to him there are a number of positives as the new code is broader and more integrated than its predecessor. It covers reinforced and prestressed concrete, buildings and general civil engineering works while also aligning with the wider suite of Eurocodes including actions, geotechnical design and seismic provisions among others. This integration provides engineers with a consistent design basis across disciplines which is something the old South African code could not offer. “The new code is continuously updated by thousands of researchers and reflects the latest understanding of structural behaviour worldwide.”
He added that compatibility with international practice was another major advantage. By adopting the Eurocode 2 based SANS 51992 1 1 South African engineers can work seamlessly across Africa where many countries are either transitioning to Eurocodes or already using them adding that Zutari is already working on such projects in Ghana, Angola, Rwanda and Eswatini where Eurocode adoption opened doors to new markets and made collaboration with international partners smoother.
He also highlighted technical advancements as SANS 51992 1 1 offers higher modulus values for concrete with more realistic treatment of global second order effects and refined models for tall and complex structures. These changes make designs more accurate and often more efficient particularly for high rise buildings and advanced infrastructure. The adoption of the code also means that widely used international software packages now support South African practice directly and this has potential to improve workflow and quality assurance.
“But there are also difficulties because the Eurocode 2 is complex with extensive cross references and more stringent detailing requirements. Engineers accustomed to the simplicity of SANS 10100 may find themselves overwhelmed. You can’t just flip to the section you need and plug in values and you often have to work back through multiple clauses, annexes and references which requires greater reliance on software and careful training.
“Bond and lap length requirements are another concern because under the new code lap lengths can be significantly longer than before especially under poor bond conditions and this complicates detailing in thick slabs, deep beams and raft foundations. Shear design also changes fundamentally with the variable strut inclination model replacing the old empirical approach which may increase reinforcement quantities. Punching shear provisions are stricter with higher reinforcement demands in some cases and combined these shifts may raise costs and require careful explanation to clients who are used to leaner designs under the old code,” Huang said.
He stressed that that consistency across the industry is vital. If some consultants adopt the new code rigorously while others cling to SANS 10100 discrepancies in reinforcement quantities and detailing will confuse clients and contractors. “We need to move together otherwise we risk undermining confidence in the profession.”
