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Section 5
5-99
BFP - BLOCK FIREPROOFING
T
T
T
T
T
T
T
T
T
Figure 5.14
Contour Fireproofing (CFP):
In this configuration, the fire-protection material forms a coating
around the steel section as shown in the next figure. The area of
fireproofing material (A
fp
) for this case is calculated in the
following manner.
For Wide Flanges (I-shaped sections)
A
fp
= [(B
f
+ 2T)*(T
f
+2T)]*2 + [(D-2T-2T
f
)*(T
w
+2T)] - A
steel
For single angles,
A
fp
= [(L
1
+2T)*(2T+T
a
) + (L
2
-T
a
)*(2T+T
a
)] - A
steel
For Tees,
A
fp
= [(B
f
+ 2T)*(T
f
+2T)] + [(D-T
f
)*(T
w
+2T)] - A
steel