Exam 28: Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Before the energy code requirement for continuous insulation came in force, the shelf angles for brick veneer support were anchored directly to the spandrel beam in a frame structure and the insulation was provided toward the outside of the shelf angle. With the requirement for continuous insulation, the insulation is sandwiched between the shelf angle and the spandrel beam. How then is the shelf anchored to the spandrel beam?

Precast concrete curtain (PCC)wall panels are non- load- bearing elements. Yet the concrete used in them is of higher strength (generally 5,000 psi)than that used in the structural frame of the building (general 4,000 psi). Explain why that is so.

Are the weep holes in brick veneer walls provided by drilling holes in bricks or by some other means? Explain and also give the center to center spacing of weep holes.

In a brick veneer and CMU backup wall assembly, where is the air- weather barrier (AWB)located? Is the AWB a sheet membrane or liquid- applied film? Explain.

What is the typical thickness of brick veneer in a brick- veneer wall?

How many bearing supports is a precast concrete curtain (PCC)wall panel provided with and where are they located?

When lintel angles and shelf angles are combined in the same angle in a brick veneer- clad building, the angle should be treated as a

What is the maximum height of brick veneer that can be supported on wall foundation without requiring any intermediate bearing support?

In which building types is the precast concrete curtain wall system commonly used?

What is the purpose of an air space between the veneer and the backup in a brick veneer wall assembly?

Are the ties in a brick veneer wall with CMU backup integral with the horizontal joint reinforcement in CMU wall? Explain.

What is the disadvantage of cold- formed steel (CFS)stud backup for brick veneer as compared with CMU backup?

The architectural design of PCC walls (exterior surface finish including any relief, color, aesthetic joints, etc.)is done by the architect in consultation with the precaster. The structural design of PCC walls is done by the precaster with information provided by the project's structural engineer. Name two important items of information that the precaster needs from the structural engineer.

How is dead load support provided to brick veneer in a multistory building?

A shelf angle must be anchored to the building's structural frame.

In a brick veneer assembly with punched windows, vertical expansion joints should be provided at a maximum distance of

The bricks used in brick- faced concrete curtain wall panels are generally

The anchors used in GFRC panels are typically

The veneer in a brick veneer wall is anchored to the backup wall with steel anchors, also called ties. What is the structural function of anchors and to which types of stress are they subjected?

A precast concrete curtain (PCC)wall panel is provided with two types of connections with the structural frame of the building. Name the two connection types.