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Work: we make arched and radius doors to
customer's design. All you need to provide is a picture or a drawing
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Round Top Door:
arch, arched, radius, etc the spanning of a wall opening by means of
separate units (such as bricks or stone blocks) assembled into an
upward curve that maintains its shape and stability through the
mutual pressure of a load and the separate pieces. The weight of the
supported load is thus converted into downward and outward lateral
pressures called thrusts, which are received by the solid piers
(abutments) flanking the opening. The blocks, called voussoirs,
composing the arch usually have a wedge shape but they can be
rectangular with wedge-shaped joints between them. The underside of
the arch is the intrados or soffit and the upper surface above the
crown block (keystone) of the arch is the extrados. The point where
the arch starts to curve is the foot of the arch, and the stones
there are the springers. The surface above the haunch (just below
the beginning of the curve) contained within a line drawn
perpendicular to the springing line (from which the arch curves),
and another drawn horizontal to the crown is the spandril. In modern
fireproof construction the word arch is also used for the masonry
that fills the space between steel beams and acts as a floor
support. The arch was used by the Egyptians, Babylonians, and
Greeks, chiefly for underground drains, and also by the Assyrians in
the construction of vaulted and domed chambers. In Europe the oldest
known arch is the Cloaca Maxima, the huge drain at Rome built by
Lucius Tarquinius Priscus c.578 BC The Romans developed the
semicircular arch, modeled on earlier Etruscan structures, in the
vaults and domes of their monumental buildings. Its use was
continued in early Christian, Byzantine, and Romanesque
architecture. In the 13th cent. the pointed arch (used as early as
722 BC in Assyrian drains) came into general use. The contact of
Europeans with Saracenic architecture during the Crusades is offered
among other theories for its introduction into Europe. But it is
likely that the pointed arch may have been independently
rediscovered in Europe in the Middle Ages as a device for solving
many of the mechanical difficulties of vault construction. Its
adoption was an essential element in the evolution of the Gothic
system of design. With the Renaissance there was a return to the
round arch, which prevailed until the 19th-century invention of
steel beams for wide spans relegated the arch to a purely decorative
function. Although the circular and pointed forms have predominated
in the West, the Muslim nations of the East developed a variety of
other arched shapes, including the ogee arch used in Persia and
India, the horseshoe arch used in Spain and North Africa, and the
multifoil or scalloped arch used especially in the Muslim
architecture of Spain. In the 20th cent. arches often take a
parabolic shape. They are usually constructed with laminated wood or
reinforced concrete, materials that give greater lightness and
strength to the structure.
Gothic Door:
Doors in Gothic houses were usually unglazed. In the most strongly
Gothic houses, doors were ledged, with vertical planks or planks in
a herringbone pattern. Oak was a prized wood. After 1860 it was more
common to see glazed and leaded front doors. Typical colours used
for painted front doors of pine or deal were dark blue, chocolate
brown (favoured by Eastlake), deep red, or else olive green.
Graining was also used. A key feature of the front door was a set of
ornamental fittings, ideally in wrought iron. Regular door-to-door
postal deliveries began in 1840 and the small letter-plate was
introduced. Larger items were received by a maid or other domestic
servant. The other furniture was a knocker and a pull to help to
close the door. Internal Gothic doors might have been ledged, or
else were panelled. As with the front door, those of better quality
wood were polished, while those of pine and deal were either grained
or painted. They were fitted with finger plates of iron or else
brass.
Arched Door:
An arch is a curved structure capable of spanning a space while
supporting significant weight (e.g. a doorway in a stone wall). The
arch was first developed in the Indus Valley civilization circa 2500
BC [1] and subsequently in Mesopotamia, Egypt, Assyria, Etruria, and
later refined in Ancient Rome. The arch became an important
technique in cathedral building and is still used today in some
modern structures such as bridges. The arch is significant because,
in theory at least, it provides a structure which eliminates tensile
stresses in spanning an open space. All the forces are resolved into
compressive stresses. This is useful because several of the
available building materials such as stone, cast iron and concrete
can strongly resist compression but are very weak when tension,
shear or torsional stress is applied to them. By using the arch
configuration, significant spans can be achieved. The arch is a very
useful structure as it is completely self-supporting. This is
because all the compressive forces hold it together in a state of
equilibrium. This even applies to frictionless surfaces. This same
principle holds when the force acting on the arch is not vertical
such as in spanning a doorway, but horizontal, such as in arched
retaining walls or dams. Even when using concrete, where the
structure may be monolithic, the principle of the arch is used so as
to benefit from the concrete's strength in resisting compressive
stress. Where any other form of stress is raised, it has to be
resisted by carefully placed reinforcement rods or fibres. |
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