NFPA 780-Rolling Sphere

[alixenos]

Hi,

Anyone has any plugin or add on to revit to allow me to use the rolling sphere method to place air terminals esp in rooftops that have multiple elevations?

Thanks.

 

[BillyMac59]

I hope someone comes along that can explain what you are asking as well as what the answer may be.

 

[jim dungar]

I hope someone comes along that can explain what you are asking as well as what the answer may be.

This is part of lightning protection systems, something that is usually done by specialists. Because LPS is not in the NEC it is not discuss very much on this forum.

An extremely simply explanation is:
The concept of a rolling sphere deals with the height of a 'lightning rod'/aerial and how far away from the rod tip does it protect. Imagine a ball with a diameter the same height as the aerial, now roll that ball across all of the flat surfaces, like a roof, the area touched by the ball/sphere would be considered as protected.

 

[electrofelon]

This is part of lightning protection systems, something that is usually done by specialists. Because LPS is not in the NEC it is not discuss very much on this forum.

An extremely simply explanation is:
The concept of a rolling sphere deals with the height of a 'lightning rod'/aerial and how far away from the rod tip does it protect. Imagine a ball with a diameter the same height as the aerial, now roll that ball across all of the flat surfaces, like a roof, the area touched by the ball/sphere would be considered as protected.

Oh, we are not talking about Zorbing

Zorbing - Wikipedia

en.m.wikipedia.org

 

[W@ttson]

We sometimes just draw the sphere and rotate it around in 2D CAD.