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Steel Hat Fixing -
Fire attack from underside / Non-loadbearing & loadbearing


Increase from 60 to 120 minutes fire resistance

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Concrete Floor Slab Upgrading, Steel Hat Fixing Method

The board thickness of the protection material is relevant to the strength of the concrete and the cover to the reinforcement. In some instances, such as very high strength concrete, a greater thickness of protection material may be required.

Table 2:
PROMATECT®-H (Steel hat fixing)
Areas of
application
Concrete thickness x
nominal density
Increase of
fire resistance
Board
thickness
Tests and assessments standards/labs
Concrete
floors slab
100mm x 2100kg/m³ From 60minutes to
120 minutes
1 x 9mm
(underside)
BS476: Part 21,
BS476: Part 22 and
AS1530: Part 4 Report No.
  • BRANZ 96/876 Issue 2
  • BRANZ FP 2138
 
 
 

Steel hat fixing - Fire attack from underside / Non-loadbearing & loadbearing
Steel hat fixing - Fire attack from underside
Fixing details


 
 
 
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