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A triangular arch is a type of arch that is shaped like a triangle. It is made up of two stones that are set at an angle of 45 degrees or thereabouts, and they meet at the apex of the arch. Triangular arches are often used in Anglo-Saxon architecture. Triangular Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 24”-72” (61-183 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A segmental arch is a type of arch with a circular arc of less than 180 degrees. It is sometimes also called a scheme arch. The segmental arch is one of the strongest arches because it is able to resist thrust. Segmental Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 7.1”-21.3” (18-54 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A Florentine arch is a type of arch that is semicircular in shape and has its extrados struck from a higher point than its intrados. This means that the length of the voussoirs is longer nearer the top of the arch. Florentine arches are often used in Renaissance architecture. Florentine Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 24”-72” (61-183 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A Gothic arch, also known as a pointed arch or 3-point arch, is an architectural element characterized by its pointed crown. The two curving sides of the arch meet at a relatively sharp angle at the top, which allows for greater structural strength and allows for taller ceilings. Gothic Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 41.7”-124.8” (106-317 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A draped arch is a type of arch that has two inverted circles at the corners and a flat top. It is typically made of stone or brick, and it is often used as a decorative element in buildings. Draped arches can be found in a variety of architectural styles. Draped Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 16.1”-48” (41-122 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A keel arch is a type of arch that is shaped like the keel of a boat. It is made up of a series of wedge-shaped stones that are arranged in a curved pattern. Keel arches are often used in buildings because they are very strong and can support a lot of weight. Keel Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 32.7”-98.4” (83-250 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A round arch is a curved structure that spans an opening. It is also known as a circular arch. Round arches are often used in architecture, as they are strong and can support a lot of weight. They are also aesthetically pleasing, and can add a touch of elegance to a building. Round Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 24”-72” (61-183 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A Tudor arch is a type of arch that is characterized by its wide span and low rise. It is a blunted version of the pointed arch of Gothic architecture, and is often used in Tudor-style buildings. Tudor arches are typically made of stone or brick, and are often decorated with carvings. Tudor Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 11.8”-35” (30-89 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A horseshoe arch is an arch that is shaped like a horseshoe. It is wider at the top than at the bottom, and it has a rounded or pointed crown. Horseshoe arches are often used in Islamic architecture, and they can be found in many mosques and other buildings. Horseshoe Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 28.3”-84.6” (72-215 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A lancet arch is a tall, narrow window with a pointed arch at its top. It is named after its resemblance to a lance, a medieval weapon. Lancet windows are a typical feature of Gothic architecture, and they can be found in churches, cathedrals, and other religious buildings Lancet Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 52.8”-158.7” (134-403 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A keyhole arch is a type of architectural arch that is shaped like a keyhole. It is characterized by a narrow opening at the top that widens out at the bottom. Keyhole arches are often used in buildings for their decorative and structural qualities. Keyhole Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 57.9”-174” (147-441 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A shouldered arch is an architectural feature consisting of a horizontal lintel supported at each end by corbels that project into the aperture. The corbels are often cut into hollow curves under their projecting ends, giving the arch a distinctive appearance. Shouldered Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 16.1”-48” (41-122 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A parabolic arch is an arch in the shape of a parabola. It is a very efficient structural form, as the curve distributes the load evenly across the arch. This makes it ideal for use in bridges and other structures that need to support a lot of weight. Parabolic Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 72”-216” (183-549 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A flat arch is a type of arch that has a more or less horizontal intrados and extrados. It is constructed of mutually supporting voussoirs that radiate from a center below the arch. Flat arches are often used in bridges and other structures where a low-profile arch is required. Flat Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 0” (0 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

An inflexed arch is a type of arch that is characterized by a double curve. The arch is composed of two arcs, one on top of the other, that are joined at the apex. The lower arc is concave, while the upper arc is convex. This creates a serpentine or S-shaped curve that is visually appealing. Inflexed Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 24”-72” (61-183 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A drop arch is a type of pointed arch that has radii of length less than the span. This means that the arch is blunter than a traditional pointed arch, and the rise is less than half the span. Drop arches are often used in Gothic architecture, and they can be found in a variety of structures. Drop Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 31.1”-92.9” (79-236 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

An inverted arch is a type of foundation that is used to support structures in soft soils. It is a curved structure that is built below the ground surface, with the crown of the arch pointing down. The inverted arch distributes the weight of the structure over a larger area of the soil. Inverted Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 21.1”-59.8” (51-152 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A four-centered arch is a type of arch that is constructed with four centers. The centers are located at the top and bottom of the arch, and at the midpoints of the sides. The arch is formed by drawing four arcs, one from each center. 4-Centered Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 20.5”-61” (52-155 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A pointed horseshoe arch is an arch that is wider at the top than the bottom, with a pointed curve that resembles a horseshoe. This type of arch is often used in Islamic architecture, and can be found in mosques, palaces, and other buildings. Pointed Horseshoe Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 35”-105.5” (89-268 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A reverse ogee arch is a type of arch that is characterized by its concave upper curve and convex lower curve. The name "reverse ogee" comes from the fact that the curves are reversed from the traditional ogee arch, which has a convex upper curve and concave lower curve. Reverse Ogee Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 15”-44.9” (38-114 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A rampant arch is an arch whose supports are not level, with one end higher than the other. This type of arch is often used in Gothic architecture to support the weight of the roof and walls. Rampant arches are typically made of stone or brick and are constructed using a series of voussoirs. Rounded Rampant Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 33.1”-99.2” (84-252 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A multi-draped arch is a type of arch that is made up of four inverted circles at the corners and a flat top. The circles are connected by curved lines, creating a flowing and graceful appearance. The arch is often used as a decorative element in architecture and can be found in a variety of styles. Multi-Draped Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 19.3”-57.5” (49-146 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A pointed cinquefoil arch is a type of arch that is composed of five lobes. The lobes are created by the intersection of two curves, and the arch is overall pointed in shape. The arch is typically made of stone or brick, and it can be found in windows, doors, and other architectural features. Pointed Cinquefoil Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 38.6”-116” (98-295 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

Arch E2 Paper is one of the paper sizes that belongs to the Architectural Paper series defined by the American National Standards Institute. Arch E2 Paper is preferred and used by North American architects to print large drawings. Arch E2 Paper has an aspect ratio of 19:13. Arch E2 Paper has a width of 26” (660 mm) and height of 38” (965 mm). The surface area of Arch E2 Paper is 6.86 ft2 (.637 m2).

A rounded trefoil arch is an arch that is shaped like three overlapping circles. The arch is typically made of stone or brick, and it is often used in Gothic architecture. Rounded trefoil arches are often found in doorways, windows, and other openings. Rounded Trefoil Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 24”-72” (61-183 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

A pointed multifoil arch is an arch that is characterized by its pointed shape and multiple lobes. The lobes are typically circular or leaf-shaped, and they are cut into the interior profile of the arch. The pointed multifoil arch is a common feature in Islamic architecture. Pointed Multifoil Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 37.8”-113.4” (96-288 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

Arch E3 Paper belongs and is standardized by the American National Standards Institute and is part of their Architectural Paper series. Arch E3 Paper is typically used by North American architects for large-scale printing. Arch E3 Paper has an aspect ratio of 13:9. Arch E3 Paper has a width of 27” (686 mm) and height of 39” (991 mm). The surface area of Arch E3 Paper is 7.32 ft2 (.68 m2).

A pointed trefoil arch is an architectural element that is composed of three pointed arches that meet at the apex. The arches are typically made of stone or brick, and they are often decorated with tracery. Pointed trefoil arches are a common feature of Gothic architecture. Pointed Trefoil Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 32.7”-98.4” (83-250 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).

Arch D Paper is one of the paper sizes within the Architectural Paper series that is standardized by the American National Standards Institute. Arch D Paper is often used by North American Architects due to its aspect ratio. Arch D Paper has an aspect ratio of 3:2. Arch D Paper has a width of 24” (610 mm) and height of 36” (914 mm). The surface area of Arch D Paper is 6 ft2 (.558 m2).

A pointed segmental arch is a type of arch that is less than a semicircle. The arch is named for its pointed crown, which is formed by the intersection of two curved lines. The pointed segmental arch is a strong and versatile arch that can be used in a variety of applications. Pointed Segmental Arches have typical spans between 4’-12’ (1.22-3.66 m) and arch rises of 13.8”-41.7” (35-106 cm). Arches are commonly paired with wall depths of 8”-16” (20.3-40.6 cm) and a course depth between of 4”-16” (10.2-40.6 cm).