Which effect allowed Roman fortifications, like Hadrian's Wall, to maintain structural integrity despite lacking modern mortar?

💡 Explanation

When stones are carefully shaped and interlocked in a dry-stone construction, mechanical interlocking results because the geometry prevents slippage and distributes load, providing stability. Therefore interlocking blocks maintains structural integrity, rather than capillary action, thermal expansion or electrostatic attraction which offer minimal support under load.

• Which effect complicates precise hour angle calculation using a medieval astrolabe at high latitudes?
• What consequence results when a wooden ship hull experiences prolonged delamination in seawater?
• Which navigational error increases consistently on an 18th-century ship relying solely dead reckoning without celestial fixes?
• Which action risks a ship running aground using 18th-century dead reckoning navigation after days without sights?
• Which agricultural outcome critically depended on the 'milpa' system of companion planting with maize in Mesoamerica?
• During the Bronze Age, which primary risk limited casting intricate designs using lost-wax technique?