Firestopping Book Firestopping Book | Page 80

NAVIGATING UL
Example 1:-
First Alpha Character–signifies what is being penetrated:
1. C-AJ-4083
Combination of Floor and Wall
■ ■
■ ■
■ ■
F = Floors
W = Walls
C = Walls and Floors
Following Alpha Character(s)–wall or floor construction type
2. C-AJ-4083
Construction Type of Floor or Wall
■ ■
■ ■
■ ■
■ ■
■ ■
■ ■
■ ■
■ ■
■ ■
■ ■
A = Concrete floors © 5 inch thick
B = Concrete floors © 5 inch thick
C = Framed floors
D = Steel decks in marine vessels
E-I = Reserved for future use
J = Concrete or masonry walls © 8 inch thick
K = Concrete or masonry walls © 8 inch thick
L = Framed walls
M = Bulkheads in marine vessels
N-Z = Reserved for future use