Lesson 2 - Quality Managment and Coordination

Question 1

Name Some Insulation Materials Used in Construction.

Answer 1

1. Fiberglass Blankets and batts.
2. Rigid Boards made from thermoplastics such as polystyrene, polyurethane, or isocyanurate
3. Loose Fill of Perlite or vermiculite
4. Spray on Foam

Question 2

An example of thermal expansion

Answer 2

Aluminum Expands at approx. 4 times the rate of masonry. and twice that of concrete.

Metals may buckle or seperate from anchors if details do not allow for movement.

Question 3

What do expansion joints do?

Answer 3

Allow masonry to move independently of structural steel or concrete frame.

Question 4

Concrete, Plaster and Masonry all act the same.

Answer 4

They will all crack but that does not mean the integrity of the structure is compromised.

Question 5

What are control joints?

Answer 5

Are intended weakend joints, in which the cracks are likely to occur. This is in preference then random cracking throughout the structure.

Question 6

What is PNC?

Answer 6

Prefered Noise Criteria- The Level of Outside Noise which a receiver can tolerate may be expressed as the Preferred Noise Control.

Question 7

What is STC and IIC?

Answer 7

Sound Transmission Class - method of rating the acoustic efficiency of various wall and floor systems.

The higher the STC rating the more efficient the construction.

IIC - Impact Isolation Class
Also refered to as Impact Noise Rating - Simple Numerical Rating Developed by the Federal Housing Administration to estimate teh impact sound isolation performance of flooring and ceiling.

Question 8

What types of material are effective for sound absorption?

Answer 8

Light Weight, Porus Materials

(Heavy and impervious materials are effective for sound isolation.

Question 9

What is NRC?

Answer 9

Noise Reduction Coeficient - Rating that compares absorptive capabilities of acoustical materials.