Which structural risk increased when Roman siege towers approached city walls that had inward-sloping talus foundations?

💡 Explanation

When siege towers approached walls with a talus, the ground floor of the tower had to be further forward than the top level, increasing the tower’s center of mass offset – leading to cantilever instability. Therefore, tower instability resulted, rather than ramp collapse, decay, or rope breakage which involve different mechanisms related to material failure, unsuitable loads, or environmental damage.

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