Precast Concrete Panels

Question 1

What are Precast Concrete Panels?

Answer 1

Precast concrete wall panels provide a single cladding assembly built by one certified manufacturer in a controlled environment. They allow for quick and straightforward exterior finish wall application for a building. For installation, they are hoisted into position by a crane and anchored to a structural frame.

Question 2

Name the different surface treatments that are available.

Answer 2

• Smooth abrasive-blasted
• Acid etched

Question 3

True or False. Panels are generally 1 storey high and run from column to column; cheaper than installing small pannels; large panels can be broken up visually by the use of reveals and false joints.

Answer 3

True.

Question 4

True or False. Precast Panels are usually made up of high-strength concrete that can hold up to 5000psi.

Answer 4

True.

Question 5

What is the thickness of a typical panel?

Answer 5

Usually between 4-6 inches. They may or may not be insulated. ( Mock up panels have to be approved by the architect )

Question 6

To attach panels to the structure, there are 2 types of connections, what are they?

Answer 6

• Gravity load connection
• Lateral load connection

Question 7

Explain how panels are typically attached to the structure.

Answer 7

They are leveled using shims or leveling bolts. Tiebacks are used to resist perpendicular tension and compression to allow for movement; they must be adjustable.

Question 8

To keep in mind.

Answer 8

Detailing a PC curtain wall is different than detailing a masonry wall. The PC wall can have a metal stud back-up wall, but doesn’t carry wind loads; not pressurized, so back-up wall can be lighter.

Question 9

True or False. The space between the precast concrete panel and the backup wall can be insulated. Generally speaking, a 2-stage joint seal is used. The outer seal acts as a weather barrier and has weep holes. The inner seal is continuous and acts as an air barrier.

Answer 9

True.