Dr. Sarah Chen is a chartered structural engineer with over fifteen years spent designing tall buildings and long-span steel structures across Europe and Asia. She read engineering at Cambridge before completing a PhD on the stability of slender steel columns at Imperial College London, where her work on imperfection sensitivity and second-order behaviour still informs how she approaches a buckling check today. Those research years taught her something she has never forgotten: that the elegant closed-form answer and the real column standing on site are separated by a long list of assumptions, and that a good engineer keeps every one of them in view.
She began her career in the London office of a large multidisciplinary practice, cutting her teeth on commercial frames and transfer structures before moving into the specialist world of high-rise design. Early on she worked under an engineer who refused to sign anything he could not explain on a single sheet of paper, and that discipline shaped her completely. To this day she believes that if a calculation cannot be sketched, narrated and defended in plain language, it is not yet finished - it is merely typed.
At Arup she now leads connection-design reviews on award-winning towers, sitting at the point where the architect's vision meets the unglamorous realities of fabrication tolerance, erection sequence and the partial factors in EN 1993. It is a role that has made her a connoisseur of the way real structures actually fail. Over the years she has learned that the interesting failures are rarely in the member itself - they hide in the joints, the bracing assumptions, the temporary condition during construction, and the load paths that everyone quietly assumed someone else had checked.
Her particular fascination is stability: the slow, treacherous way a perfectly adequate member becomes inadequate the moment you stop holding it the way the textbook drew it. Lateral-torsional buckling, the C₁ factor and effective lengths, the difference between a brace that works and one that merely looks like it should - these are the problems she returns to again and again, because they are where intuition and code most often part company. She has seen too many designs where the numbers passed and the concept did not.
Sarah writes for CivilAxis to demystify the parts of EC3 that engineers reach for every single day but rarely see explained from first principles: flexural and lateral-torsional buckling, bolt-group eccentricity in elastic and plastic methods, second-order P-delta effects, and the fatigue of welded connections. She treats each article as the conversation she would have with a bright graduate over a drawing - clause first, then the judgement that turns it into a buildable detail.
When she is not designing or writing, she mentors early-career engineers and sits on an industry working group revising guidance on steel stability. She is unfailingly generous with her time, partly because she remembers how opaque the profession felt at the start, and partly because she is convinced that an engineer who can explain their work clearly is, almost always, an engineer who has understood it properly.