Structural glass spider connection calculations

• Mar 30, 2011

• #2

msquared48

Structural

Aug 7, 2007

14,745

US

What is this enclosure box for?

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

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• Mar 30, 2011

• Thread starter
• #3

Sparkco

Civil/Environmental

Nov 17, 2006

8

CA

The box is for art protection. Exterior application. About 6 ft. in height. Service area is about 5 ft. x 5 ft.

 

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• Mar 30, 2011

• #4

msquared48

Structural

Aug 7, 2007

14,745

US

So this is a weather enclosure to protect art?

Is it completely enclosed or open on one or more sides?

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

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• Mar 30, 2011

• Thread starter
• #5

Sparkco

Civil/Environmental

Nov 17, 2006

8

CA

Completely enclosed with the bottom open. My concerns are the following:

- Need to calculate the deflection of the glass.
- Need to calculation the stress point of the glass (swivel hole).
- Need to calculate the spider connectors.

Is there a procedure of doing this engineering calculation on this structural glazing with spider connection?

Thanks for your help.

 

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• Mar 30, 2011

• #6

Brad805

Structural

Oct 26, 2010

1,546

CA

Any reason you cannot use something like the CR Laurence glass connectors? You might want to consider setting out the specs for the enclosure and let the supplier provide you whatever calcs/info you require.

http://www.crlaurence.ca/default.aspx

Brad

 

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• Mar 30, 2011

• #7

Lion06

Structural

Nov 17, 2006

4,238

US

When I design glass, I use a FEA program with the actual support conditions to get a stress. Then I compare that to an allowable out of ASTM E-1300 - which is dependent on the type of glass.

Are you using annealed, heat strengthened, or tempered?

 

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• Mar 30, 2011

• Thread starter
• #8

Sparkco

Civil/Environmental

Nov 17, 2006

8

CA

Composition of the glazing is as followed:

12mm tempered heat soaked tested, 0.060 PVB Sentry glass plus, 12mm tempered.

 

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• Mar 31, 2011

• Thread starter
• #9

Sparkco

Civil/Environmental

Nov 17, 2006

8

CA

Is there anybody know how? Any suggestion?

 

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