Question 1

Horizontal expansion joints must be placed below all shelf angle irons supporting brick masonry.

Accepted Answer

This is correct. The purpose of horizontal expansion joints is to provide flexibility for the masonry to expand and contract with temperature changes. Shelf angle irons can restrict this movement, so they must be separated by expansion joints.

Question 2

Cracks from movement are completely preventable in masonry.

Accepted Answer

While proper construction and installation techniques can minimize the occurrence of cracks in masonry, it is not always completely preventable as thermal expansion and contraction, settling of foundations, and other factors can still contribute to cracking over time.

Question 3

A _____ joint is used to create a plane of weakness in conjunction with joint reinforcement.&#10;A) control&#10;B) building expansion&#10;C) construction&#10;D) cold

Accepted Answer

Control joints are used to create a plane of weakness to control cracking in concrete structures.

Question 4

By far, the most common movement joint a mason comes into contact with is the ______ .&#10;A) control joint&#10;B) expansion joint&#10;C) isolation joint&#10;D) cold joint

Accepted Answer

Expansion joints are the most common type of movement joint encountered by masons, designed to allow for the expansion and contraction of materials due to temperature changes, preventing cracks and structural damage.

Question 5

Concrete and concrete masonry Chapters have moisture and thermal movements that are very similar to those of brick masonry.

Accepted Answer

Concrete and concrete masonry have different moisture and thermal expansion rates compared to brick masonry, leading to different movement characteristics.

Question 6

Intersecting walls that carry the load of floors and roofs of buildings must also be able to stretch or flex.

Accepted Answer

Intersecting walls that carry loads of floors and roofs must have the ability to stretch or flex to accommodate any movements or settling of the building without cracking or collapsing.

Question 7

When an intersecting wall is butted against the main wall with a mortar joint at the point of contact, it is usually called a _____ joint.&#10;A) piled&#10;B) filled&#10;C) stacked&#10;D) flex

Accepted Answer

The answer of When an intersecting wall is butted against...

Question 8

Structures are constantly moving.

Accepted Answer

All structures, whether natural or man-made, experience some degree of movement due to factors such as changes in temperature, wind, and ground settling. This movement may not be detectable to the naked eye, but it is always present.

Question 9

A good example of a _____ expansion joint is when brickwork is supported on steel angle irons that are bolted to the main structure.&#10;A) frame&#10;B) isolated&#10;C) horizontal&#10;D) vertical

Accepted Answer

Horizontal expansion joints are used when there is a horizontal movement in structures, such as when brickwork expands and contracts due to temperature changes and is supported on structures like steel angle irons.

Question 10

Metal reinforcement wire especially made to tie intersecting walls is welded in the shape of a _____ .&#10;A) V&#10;B) X&#10;C) Z&#10;D) T

Accepted Answer

Metal reinforcement wire designed for tying intersecting walls is typically welded in the shape of a "T" to provide structural support and stability at the junctions where walls intersect. This shape allows for effective distribution of stress and reinforcement at the intersection points.

Deck 25: Movement Joints and Intersecting Walls