Here is an interesting one that came up. When I calculate the volume of a
commodity, do I include the air inside the box or only the combustible material?
The product is metal inside a plastic tube inside a cardboard box. The only
plastic is the tube. There is a lot of air space around it inside the cardboard
box. If I calculate the full volume of the box, the plastic would be less than
5% of the volume and be a Class III commodity. If I only include the
combustible material, the volume of plastic would exceed the 5% (but less than
the 25%) of volume and it would be a Class IV. Of course the only reason I am
asking this is that the existing system can provide protection for Class III
but not for Class IV. Thoughts?
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860-535-2080 (tel:860-535-2080) (ofc)
860-554-7054 (tel:860-554-7054) (fax)
860-608-4559 (tel:860-608-4559) (cell)
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