TB 031 - Polycarbonate Windows

Question 1

Lexan is a ______ ________ that has outstanding impact strength, heat resistance, dimensional stability, transparency, ease of fabrication, resistance to ultraviolet light, and is self-extinguishing.

Answer 1

polycarbonate thermoplastic

Question 2

Lexan is used in temperatures ranging from –60º F to 280º F, and will soften at ___º F.

Answer 2

350º F

Question 3

In normal use, Lexan window material has a thickness from __ inch to __ inch

Answer 3

1/8 inch to ¼ inch

Question 4

On special installations protecting cashiers, bank tellers and toll collectors the thickness of sheets used may be up to ___ inch.

Answer 4

1¼

Question 5

At the present time polycarbonate window installations are not approved by the Los Angeles City Building Department. However Lexan may be found in these places.

Answer 5

• The Los Angeles Unified School District school buildings.
• The Recreation and Parks Department buildings
• Thrifty Drug Stores in the south central areas of the city.

Question 6

Lexan windows can be cut out easily with the rotary saw by using the _______-_____ ____ cutting blade.

Answer 6

carbide-tipped wood cutting blade.

Question 7

_______ cuts should be made first.

Answer 7

Horizontal

Question 8

_____ ____are not effective and they shall not be used on this material.

Answer 8

Chain saws

Question 9

In a multi-pane Lexan window the ______ may be cut allowing the panes to be pushed in.

Answer 9

mullions