Which structural vulnerability increased in pre-1850 timber bridges subjected to prolonged wetting and drying cycles?

💡 Explanation

When timber bridges experience repeated wetting and drying, wood rot accelerates at joints because moisture promotes fungal growth and weakens the wood fibers, leading to shear failure at mortise and tenon joints. Therefore shear failure risk increases, rather than buckling, deck instability, or cable rupture, which depend on different load or material properties.

• Which outcome occurs when an astrolabe's mater warps due to temperature variation, impacting angular measurement?
• Which limitation constrained the early practical adoption of John Harrison's marine chronometer design during mid-18th century navigation?
• Which function did the 'tympanum' or 'mater' disk primarily serve within the intricate mechanics of a medieval astrolabe?
• Which problem arose from the construction of straight Roman roads across terrain with varied soil composition?
• Which long-term effect arose from the Aztec chinampa system's intensive cultivation around Tenochtitlan?
• Which environmental benefit accrued when the chinampa cultivation system expanded in Tenochtitlan's construction?