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CONCRETE STRUCTURES AND SOFFITS-FIRE PROTECTION |
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Pyrok can be used to increase the fire protection properties of concrete structures such as multi-storey car parks, bride decks and soffits, particularly in tunnels. The company will supply information on the preparation of concrete surfaces to receive Pyrok. Pyrok has been specified by leading transport and transit authorities around the world for its suitability in the onerous conditions found in rail, metro, vehicular and subway tunnels and underpasses. |
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TABLE 1
Required thickness of
Pyrok CV27
(mm)
|
Existing
Cover (mm) |
Required fire resistance period (Hour) |
| 1/2 |
1 |
1 1/2 |
2 |
3 |
4 |
10 |
7 |
7 |
8 |
13 |
18 |
23 |
15 |
-- |
7 |
7 |
10 |
15 |
20 |
20 |
-- |
-- |
7 |
8 |
13 |
18 |
25 |
-- |
-- |
-- |
7 |
10 |
15 |
30 |
-- |
-- |
-- |
7 |
8 |
13 |
40 |
-- |
-- |
-- |
-- |
7 |
8 |
50 |
-- |
-- |
-- |
-- |
-- |
7 |
60 |
-- |
-- |
-- |
-- |
-- |
-- |
70 |
-- |
-- |
-- |
-- |
-- |
-- |
REINFORCED CONCRETE
REQUIRED COVER TO STEEL
(Based on comparison with BS8110)
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TABLE 2
Required thickness of
Pyrok CV27 (mm)
|
Existing
Cover (mm) |
Required fire resistance period (Hour) |
| 1/2 |
1 |
1 1/2 |
2 |
3 |
4 |
10 |
7 |
8 |
10 |
15 |
23 |
28 |
15 |
7 |
7 |
8 |
13 |
20 |
25 |
20 |
-- |
7 |
7 |
10 |
18 |
23 |
25 |
-- |
-- |
7 |
8 |
15 |
20 |
30 |
-- |
-- |
-- |
7 |
13 |
18 |
40 |
-- |
-- |
-- |
-- |
8 |
13 |
50 |
-- |
-- |
-- |
-- |
7 |
8 |
60 |
-- |
-- |
-- |
-- |
-- |
7 |
70 |
-- |
-- |
-- |
-- |
-- |
-- |
PRESTRESSED CONCRETE
REQUIRED COVER TO STEEL
(Based on comparison with BS8110) |
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TABLE 3
Required thickness of
Pyrok CV27 (mm)
|
Existing
Slab
Thickness
(mm) |
Fire resistance period (Hour) |
| 1/2 |
1 |
1 1/2 |
2 |
3 |
4 |
75 |
-- |
10 |
18 |
25 |
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80 |
-- |
8 |
15 |
23 |
35 |
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90 |
-- |
7 |
10 |
18 |
30 |
|
100 |
-- |
-- |
7 |
13 |
25 |
35 |
110 |
-- |
-- |
-- |
8 |
20 |
30 |
120 |
-- |
-- |
-- |
7 |
15 |
25 |
130 |
-- |
-- |
-- |
-- |
10 |
20 |
140 |
-- |
-- |
-- |
-- |
7 |
15 |
150 |
-- |
-- |
-- |
-- |
-- |
10 |
160 |
-- |
-- |
-- |
-- |
-- |
7 |
170 |
-- |
-- |
-- |
-- |
-- |
-- |
180 |
-- |
-- |
-- |
-- |
-- |
-- |
SOLID SLABS
SLAB THICKNESS REQUIREMENTS
(Based on comparison with BS8110) |
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