Which consequence occurred if medieval stonemasons built arches without proper centering?

💡 Explanation

Catastrophic collapse occurs because the keystone placement relies on temporary support called centring; the **arch effect** distributes the load only once the keystone is locked. Therefore without complete centering the unbuttressed voussoirs fall, rather than transferring loads to the abutments.

• Which consequence occurs when insufficiently seasoned marble receiving pietra dura experiences significant variations in humidity?
• Which outcome arises should sericulture degrade silk production under Justinian I?
• Which mechanism limited the height of Roman concrete (opus caementicium) structures compared to modern reinforced concrete?
• Which consequence results when terrace walls fail during intense rainfall?
• Within a Mughal garden's raised aqueduct system, which outcome is hastened when joints use simple mortar rather than interlocking terracotta pipes?
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