An A-frame is a basic structure designed to bear a load in a lightweight economical manner. The simplest form of an A-frame is two similarly sized beams, arranged in an angle of 45 degrees or less, attached at the top, like an uppercase letter 'A'. These materials are often wooden or steel beams attached at the top by rope,

welding Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion. Welding is distinct from lower temperature techniques such as bra ...

gluing Adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation. The use of adhesives offers certain advant ...

, or

rivet A rivet is a permanent mechanical fastener. Before being installed, a rivet consists of a smooth cylindrical shaft with a head on one end. The end opposite to the head is called the ''tail''. On installation, the rivet is placed in a punched ...

ing.

A-frames can be used as-is, as part of shears, or set up in a row along a longitudinal beam for added stability, as in a

saw horse In woodworking, a saw-horse or sawhorse (saw-buck, trestle, buck) is a trestle structure used to support a board or plank for sawing. A pair of sawhorses can support a plank, forming a scaffold. In certain circles, it is also known as a ''m ...

. More complex structures will often have

crossmember A crossmember is a structural section that is transverse to the main structure. In the automotive industry, the term typically refers to a component, usually of steel, usually boxed, that is bolted across the underside of a monocoque / unibody ...

s connecting the A-frames at different angles,"A-frame" (2009). ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0). Oxford University Press. forming a

truss A truss is an assembly of ''members'' such as beams, connected by ''nodes'', that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assembl ...

Other structures that use A-frames

A-frame house An A-frame house or other A-frame building is an architectural house or building style featuring steeply-angled sides (roofline) that usually begin at or near the foundation line, and meet at the top in the shape of the letter A. An A-frame ...

* A-frame

hydroponics Hydroponics is a type of horticulture and a subset of hydroculture which involves growing plants, usually crops or medicinal plants, without soil, by using water-based mineral nutrient solutions in aqueous solvents. Terrestrial or aquatic plant ...

system * A-frame contour measuring

spirit level A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical ( plumb). Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, ...

* A frame camping tent * A-frame complex, a motif in chemistry * Folding

ladder A ladder is a vertical or inclined set of rungs or steps used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such ...

Double wishbone suspension A double wishbone suspension is an independent suspension design for automobiles using two (occasionally parallel) wishbone-shaped arms to locate the wheel. Each wishbone or arm has two mounting points to the chassis and one joint at the knuckl ...

(cars) * Some suspension bridges * Some

swing bridge A swing bridge (or swing span bridge) is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pi ...

s * A-frame level: An A-frame with a

plumb line A plumb bob, plumb bob level, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertic ...

hung from the vertex, used to establish a horizontal line; known in ancient Egypt, these were used in Europe until the mid–19th century. * At the stern of ships for fishing or research * The main building of Florida's Disney's Contemporary Resort, in which the

Walt Disney World The Walt Disney World Resort, also called Walt Disney World or Disney World, is an entertainment resort complex in Bay Lake and Lake Buena Vista, Florida, United States, near the cities of Orlando and Kissimmee. Opened on October 1, 1971, ...

monorail has a station * Some

Wienerschnitzel Wienerschnitzel is an American fast food chain founded in 1961 (as "Der Wienerschnitzel") that specializes in hot dogs. Despite the name, the company does not sell Wiener schnitzel, only selling it once as a promotional item. Wienerschnitzel l ...

and

Whataburger Whataburger is an American regional fast food restaurant chain, headquartered and based in San Antonio, Texas, that specializes in hamburgers. The company, founded by Harmon Dobson and Paul Burton, opened its first restaurant in Corpus Chris ...

restaurants use the A-frame * The London Eye is supported by only one A-frame on one side. * Some beam engines use an A-frame

References

{{reflist Structural system