Annulus (firestop)

The annulus, or annular space, is the space between a penetrant and anything that surrounds it, such as the sides of an opening or a sleeve, depending on the case.[1] It is named after the corresponding geometric concept due to its shape.

References

  1. ^ "Fire Stop Technologies". firestopstl.com. Retrieved 2024-01-15.

External examples of the use of the term.

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