Selected Bibliography Architecture - Form Space and Order | Page 165

U - SH APED PLANES

A U-shaped configuration of vertical planes defines
a field of space that has an inward focus as well as
an outward orientation. At the closed end of the
configuration, the field is well defined. Toward the
open end of the configuration, the field becomes
extroverted in nature.

The open end is the primary aspect of the
configuration by virtue of its uniqueness relative
to the other three planes. It allows the field to have
visual and spatial continuity with the adjoining
space. The extension of the spatial field into
the adjoining space can be visually reinforced by
continuing the base plane beyond the open end of the
configuration.

If the plane of the opening is further defined with
columns or overhead elements, the definition of the
original field will be reinforced and continuity with
the adjoining space will be interrupted.

If the configuration of planes is rectangular and
oblong in form, the open end can be along its narrow
or wide side. In either case, the open end will remain
the primary face of the spatial field, and the plane
opposite the open end will be the principal element
among the three planes of the configuration.

150 / A R C H I TE C TU R E : F O R M , S PA C E , & O R D E R