Glass and Glazing

Question 1

What are some reasons glass is the most-used material for cladding?

Answer 1

Light-weight
Durable
Range of optical & thermal properties

Question 2

What is the thickness range for glass?

Answer 2

From
3/32” (single strength)
to
1/3” (double strength)
to
1”

Question 3

What are some glass properties that make it preferrable?

Answer 3

Strong
Recyclable
Workable
Transparent

Question 4

What is u-value?

Answer 4

Measure of how much heat is transferred through a window

Question 5

What is the greenhouse effect?

Answer 5

Trapping of light from the sun inside an enclosed area leads to heating

Question 6

What is visible transmittance?

Answer 6

Fraction of visible light coming through glass

Question 7

What is float glass?

Answer 7

glass made by allowing it to solidify on molten metal

Question 8

What is annealed glass?

Answer 8

Float glass cooled slowly to reduce built-in stress

Question 9

What is tempered glass?

Answer 9

Annealed glass reheated and cooled rapidly

Question 10

What is laminated glass?

Answer 10

Sandwich of multiple layers of glass w/ PVB interlayer

Question 11

What is patterned glass?

Answer 11

Glass w/ different textures and patterns to obscure vision

Question 12

What is fritted glass?

Answer 12

Pigmented glass particles called frits are used to imprint glass

Question 13

Spandrel glass?

Answer 13

Used to cover bands of floor / wall around floor edges

Question 14

Glazing for small lights is considered below:

Answer 14

6ft^2

Question 15

Glazing for large lights is considered above:

Answer 15

6ft^2

Question 16

Define Lockstrip gasket:

Answer 16

dry-glazing method that is faster, easier and less dependent on workmanship

Question 17

Is wet glazing more effective or lockstrip gasket?

Answer 17

With good workmanship, wet glazing

Question 18

Briefly define Butt-joint glazing system:

Answer 18

Head and bottom (sill) of glass sheets are supported in metal frames, vertical mullions are eliminated

Question 19

Briefly define Suspended glazing systems and glass mullion system

Answer 19

Used for high walls & lobbies
Glass sheets are suspended from above, and metal fittings are used to join other sheets

Question 20

Four-point spider fitting is used for this glass system:

Answer 20

Suspended glazing / glass mullion system