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Frames as Thickened Edges

Opening context:
Natural Doors and Windows, Efficient Structure, Gradual Stiffening

Conflict

Any homogeneous membrane which has holes in it will tend to rupture at the holes unless the edges of the holes are reinforced by thickening.

Resolution

Do not consider door and window frames as separate rigid structures which are inserted into holes in walls. think of them instead as thickenings of the very fabric of the wall itself, made to protect the wall against the concentrations of stress which develop around openings.

In line with this conception, build the frame as thickenings of the wall material, continuous with the wall itself, made of the same materials, and poured, or built up, in a manner which is continuous with the structure of the wall.

Closing context:
Deep Reveals, Windows which Open Wide, Solid Doors with Glass, Small Panes