Which constraint limited scaling iron bridge spans built following Abraham Darby's coke smelting process?

💡 Explanation

Higher sulfur content embrittled the cast iron because the imperfect smelting introduced iron sulfide inclusions, causing stress concentrations which initiated cracking, therefore bridge spans remained modest, rather than experiencing catastrophic failures from abutment problems.

• Which primary risk increased for Roman arch bridges as the concrete mix evolved during bridge construction?
• Which outcome occurred if Bronze Age Mesopotamian chariots exceeded copper's fatigue limit during warfare use?
• Which risk increases concerning Mughal pietra dura when cyclical temperature variations induce differential rates?
• Which navigational error increased when using a damaged 18th-century sextant with a warped frame?
• Which mechanism limited 18th-century wooden ship hull integrity when cannons were fired?
• Which optical consequence occurs when surface imperfections exist on an Abbasid-era lens?