A buttress is an architectural structure built against or projecting from a wall which serves to support or reinforce the wall.[1] Buttresses are fairly common on more ancient buildings, as a means of providing support to act against the lateral (sideways) forces arising out of inadequately braced roof structures.
The term counterfort can be synonymous with buttress[2] and is often used when referring to dams, retaining walls and other structures holding back earth.
Early examples of buttresses are found on the Eanna Temple (ancient Uruk), dating to as early as the 4th millennium BC.[citation needed]
Terminology[edit]
In addition to flying and ordinary buttresses, brick and masonry buttresses that support wall corners can be classified according to their ground plan. A clasping or clamped buttress has an L-shaped ground plan surrounding the corner, an angled buttress has two buttresses meeting at the corner, a setback buttress is similar to an angled buttress but the buttresses are set back from the corner, and a diagonal (or 'French') buttress is at 135° to the walls (45° off of where a regular buttress would be).[3][4]
The gallery below shows top-down views of various types of buttress (dark grey) supporting the corner wall of a structure (light grey).
- Buttress ground plans
-
Angled buttress -
Clasping or clamped buttress -
Diagonal or 'french' buttress -
Setback buttress
Gallery[edit]
- Examples of Buttresses
-
A buttress and a flying buttress, mostly concealed, supporting walls at the Palace of Westminster -
Buttress at Our Saviour's Chapel, Żejtun, Malta -
Façade buttresses at Milan Cathedral, Italy -
Buttresses on the 700ft tall Daniel-Johnson Dam, Quebec -
Thick buttresses characterize Earthquake Baroque architecture like Paoay Church, Philippines -
-
Buttresses to support the wall of this row house were constructed after its neighboring house was taken down as part of the Centralia mine fire. -
See also[edit]
References[edit]
- ^ "Buttress", www.britannica.com, Encyclopædia Britannica
- ^ Chisholm, Hugh, ed. (1911), , Encyclopædia Britannica, vol. 7 (11th ed.), Cambridge University Press, p. 315
- ^ "Glossary : Buttress". www.lookingatbuildings.org.uk.
- ^ Edward Wyatt. "Church architecture: Spires and buttresses". www.prestbury.net.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction