ose becomes infinite atthe springing. This difficulty does not exist in practice, forthat part of an arch which lies beyond the plane of the faceof the abutment in reality forms a part of the abutmentitself (fig. 21J. The Gothic architects well understood this, and in theirvaulted roofs built this… … cient to contain the curve ofequilibrium under the greatestload to which it can be exposed;and, as the pressure on the archstones increases from the crownto the springing, their depthshould be increased in the sameproportion. Each joint of thevoussoirs should be at rightangles to a tangent to the…
Architecture · Building
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