Previous in Forum: Vacum Fiberglass Molding   Next in Forum: Looking for 1 1/2" Left Hand Thread Bolt or Threaded Stock
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
5 comments
Rate Comments: Nested
John Lui
Participant

Join Date: Jul 2013
Posts: 1

Engineer

07/09/2013 10:37 PM

I need to know the U value for a blast resistant glazing of the following make up, 4mm float glass+1.5mm PU film+3mm polycarbonate+1.5mm PU film+4mm float glass. Need help.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Engineer

07/09/2013 10:44 PM

Ask your blast resistant glazing supplier for help.

Or,

F2248 - ASTM International

Or,Blast Resistant Glazing Design - all - Standards Design Group, Inc.

Or,3¼" DEFCON Series Blast-Resistant Windows - Wojan Window ...

Or,

[PDF]

Bomb Blast Resistant Glazing: Testing and Standards
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#2

Re: Engineer

07/10/2013 1:23 AM

The manufacturer should have these figures....

http://www.wojan.com/4%C2%BE-m-950b-blast-39/

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3

Re: Engineer

07/10/2013 3:49 AM

Do what this individual is doing, to the manufacturer of the glass:

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#4

Re: Engineer

07/10/2013 9:49 AM

As stated, the performance sheet of the particular glazing will include this information.

It is going to be poor, probably along the line of 2 W/m²·K.

U = k/L where k is the material's thermal conductivity and L is its thickness.

__________________
 Semper Ubi Sub Ubi
Register to Reply
TimBurks13
Active Contributor

Join Date: Jul 2013
Location: USA
Posts: 12
#5
In reply to #4

Re: Engineer

07/27/2013 2:43 AM

SUPER-SAFELITE EBR (Explosive Blast Resistant) glass is capable of withstanding the blast impact from explosives and can be designed and manufactured to suit each individual project.
Register to Reply
Register to Reply
Have a Different Question?
5 comments
Copy to Clipboard

Users who posted comments:

Doorman (1); lyn (1); PWSlack (1); SolarEagle (1); TimBurks13 (1)

Previous in Forum: Vacum Fiberglass Molding   Next in Forum: Looking for 1 1/2" Left Hand Thread Bolt or Threaded Stock

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Manufacturing:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (107 right now)
Show Members
Advertisement