Art History I / Architecture I: Structure and What It Permits
Practice question · Fill in the blanks

Complete the account of structure.

Stone is strong in compression and weak in ______, which is why a stone lintel spans only a short distance. An arch converts the load into compression along a curve at the cost of outward ______. The curved triangles that set a round dome on a square plan are ______. Once a ______ carries the load, the wall becomes a screen.

Word bank: tension · thrust · pendentives · frame · compression · buttresses

Hints
  1. The first blank names the force stone resists badly.
  2. The last blank is the system that made the curtain wall possible.
Show the answer

Stone is strong in compression and weak in tension, which is why a stone lintel spans only a short distance. An arch converts the load into compression along a curve at the cost of outward thrust. The curved triangles that set a round dome on a square plan are pendentives. Once a frame carries the load, the wall becomes a screen.

Why

The four blanks are the whole causal chain of the lesson: a property of the material, a device that works around it, a device that works around that device's cost, and finally a material combination that dissolves the original constraint.

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