1. The problem statement, all variables and given/known data If a question gives us a max load with different extensions, how do I calculate the strain? For example: 1900KN=x mm 1900KN=x mm 2000KN=x mm 2000KN=x mm 2000KN=x mm 1900KN=x mm 1900KN=x mm 2. Relevant equations strain= ΔL / L 3. The attempt at a solution What I think is perhaps taking the average extension x? Is this correct? And afterwards taking x avg/ L?