Question 1

The rise of a segmental arch should not be less than 1&#8243; per foot of the span and the skewback should be at right angles to the arch axis.

Accepted Answer

This statement is true. A rise of at least 1 inch per foot of the span is necessary for the stability and proper distribution of weight in a segmental arch. Additionally, the skewback, which is the point where the arch springing meets the supporting structure, should be perpendicular to the axis of the arch to ensure proper load transfer.

Question 2

Minor arches have a maximum span of 10' and a maximum equivalent load of about 1500 lbs per linear square foot of span.

Accepted Answer

Minor arches can span more than 10 feet, and the maximum equivalent load they can support varies widely depending on the design, materials, and construction method, not typically quantified as a specific number of pounds per linear square foot of span.

Question 3

A _____ arch is a four-center arch with medium rise-to-span ratio.&#10;A) Gothic&#10;B) Venetian&#10;C) Queen Anne&#10;D) Tudor

Accepted Answer

A Tudor arch is characterized by its four-centered design, which allows for a medium rise-to-span ratio, distinguishing it from other arch types.

Question 4

Gothic bullseye arches are the most commonly used arch types today.

Accepted Answer

Gothic bullseye arches were used primarily in Gothic architecture during the medieval period, and are not commonly used in modern architecture. The most commonly used arch types in modern architecture are semicircular and pointed arches.

Question 5

The concave curve that bounds the entire curvature of the lower limits of an arch is called its _____ .&#10;A) beam&#10;B) supporting load&#10;C) compressive load&#10;D) intrados

Accepted Answer

The intrados is the term used to describe the concave curve that bounds the entire curvature of the lower limits of an arch. A beam refers to a structural element that is capable of withstanding a load primarily through bending. A supporting load refers to the force that is applied to a structure to keep it in place. A compressive load refers to a force that tends to shorten or squeeze a material.

Question 6

The ______ is the apex of the arch ring.&#10;A) crown&#10;B) camber&#10;C) keystone&#10;D) rise

Accepted Answer

The answer of The ______ is the apex of the...

Question 7

An arch is a beam that is curved in the plane of the loads resting on it.

Accepted Answer

An arch is a beam that is curved in the plane of the loads resting on it.

Question 8

The ______ is the undersurface or bottom of the arch.&#10;A) skewback&#10;B) soffit&#10;C) intrados&#10;D) springer

Accepted Answer

The soffit is the undersurface or bottom of the arch. The skewback is the part of the wall that receives the ends of the arch, the intrados is the interior curve of the arch, and the springer is the first stone or brick that forms the base of the arch.

Question 9

The _____ arch is a flat arch of solider position brick.&#10;A) multicentered&#10;B) jack&#10;C) semicircular&#10;D) Gothic

Accepted Answer

The description provided - "a flat arch of solider position brick" - fits the definition of a jack arch, which is often used in construction with brick.

Question 10

Concrete and steel lintels, which shorten installation time, have now greatly replaced the masonry arch.

Accepted Answer

Concrete and steel lintels are preferred over masonry arches due to their durability and ease of installation, which has resulted in their widespread use in construction.

Deck 36: Development of Arches