■ ■
■ ■
■ ■
Through Void: Spreading within the building through the void space
created between the edge of the floor and an exterior curtain wall.
This is regulated by Section 715.4 and addressed later.
Through Cavity: Spreading through a void or cavity within the
exterior curtain wall. In this situation, the fire would spread by a
path within the concealed space of the exterior wall. This would be
regulated by Sections 718 and 718.2.2, or perhaps Chapter 14 (e.g.,
1403.5) but is not addressed within this book.
Leap-frogging: Spreading to the exterior and then impinging on
an opening in an upper level. This path is generally referred to as
“leap-frogging,” is regulated by Sections 705.8.5 and 715.5, and is
addressed later.
These three potential paths are shown within Figure.
OPENINGS IN
EXTERIOR WALL
– REGULATED BY
SECTIONS 705.8
AND 715.5
INTERIOR
AT VOID SPACE-REGULATED
BY SECTION 715.4
EXTERIOR
WITHIN EXTERIOR WALL –
REGULATED BY SECTION 718
AND CHAPTER 14
(Fig 5.4 Potential Paths for Fire Spread)
135