Which risk increases for dry-stone arch bridges nearing collapse?

💡 Explanation

Rock spall rapidly weakens structures because surface weathering causes differential stress concentrations leading to tensile fracture, therefore the bridge degrades due to loss of material, rather than through excess point loading.

• Which mechanism causes increased efflorescence within Mughal garden fountains, resulting in damage?
• Which mechanism limited early 18th-century warships from maintaining high speed in heavy seas?
• Which communication risk arose when the Byzantine emperors used coded language in diplomatic messages?
• Which factor most accelerated the Romans' transition from manipular legions to cohort legions, affecting weapon effectiveness?
• Which mechanical risk increases in Viking longships when poorly treated sails freeze?
• Which outcome occurs when ropes supporting an Inca suspension bridge experience extreme diurnal temperature variation?