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Direct Fixing -
Fire attack from one or both sides / Non-loadbearing & loadbearing

Increase from 60 to 240 minutes fire resistance

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Concrete/Brick Wall Upgrading, Direct Fixing Method

For loadbearing upgrading, the concrete cover to the reinforcing at the non-board side must be of minimum 30mm thick for 120 minutes wall or minimum 50mm thick for 240 minutes wall.

The board thickness of the protection material is relevant to the strength of the concrete and the cover to the reinforcement. In some instances, e.g. high strength (Grade B70), PROMATECT®-H 50mm is needed for a 120 minutes performance to RWS. This situation applies to all exposure curves.

Table 3:
PROMATECT®-H (2-sided direct fixing)
Areas of
application		 Concrete/brick thickness x
nominal density		 Increase of
fire resistance		 Board
thickness		 Tests and assessments standards/labs
Concrete/
brick walls		 100mm x 2100kg/m³ From 108 minutes to
240 minutes		 1 x 15mm
(each side)
BS476: Part 21,
BS476: Part 22 and
AS1530: Part 4 Report No.
  • BRANZ 96/876 Issue 2
  • BRANZ 99/1355
  • BRANZ FAR 2419
  • BRANZ FP 2138
  • BTL 97/1029
Concrete/
brick walls		 75mm x 2100kg/m³ From 60 minutes to
120 minutes		 1 x 12mm
(each side)
Concrete/
brick walls		 100mm lightweight concrete x 700kg/m³ From 120 minutes to
240 minutes		 1 x 9mm
(each side)
Concrete/
brick walls		 255mm brick
or
100mm brick with
13mm gypsum plaster		 * From 120 minutes to
240 minutes		 1 x 9mm
(each side)
Concrete/
brick walls		 100mm brick From 60 minutes to
240 minutes		 1 x 20mm
(each side)
Concrete/
brick walls		 100mm brick * From 60 minutes to
120 minutes		 1 x 6mm
(each side)
* For Hong Kong only 
Table 4:
PROMATECT®-H (1-sided direct fixing)
Areas of
application		 Concrete/brick thickness x
nominal density		 Increase of
fire resistance		 Board
thickness		 Tests and assessments standards/labs
Concrete/
brick walls		 100mm x 2100kg/m³ From 110 minutes to
240 minutes		 1 x 21mm (1) or
1 x 15mm (2)
BS476: Part 21,
BS476: Part 22 and
AS1530: Part 4 Report No.
  • BRANZ 96/876 Issue 2
  • BRANZ 99/1355
  • BRANZ FAR 2419
  • BRANZ FP 2138
  • BTL 97/1029
Concrete/
brick walls		 75mm x 2100kg/m³ From 60 minutes to
120 minutes		 1x 15mm (1) or
1 x 12mm (2)
Concrete/
brick walls		 100mm lightweight concrete x 700kg/m³ From 120 minutes to
240 minutes		 1 x 20mm (1) or
1 x 15mm (2)
Concrete/
brick walls		 255mm brick
or
100mm brick with
13mm gypsum plaster		 * From 120 minutes to
240 minutes		 1 x 21mm (1)
Concrete/
brick walls		 100mm brick From 60 minutes to
240 minutes		 1 x 29mm (1) or
1 x 20mm (2)
Concrete/
brick walls		 100mm brick * From 60 minutes to
120 minutes		 1 x 12mm (1)
* For Hong Kong only 
NOTES:
  • (1) for fire risk from either side of the concrete or brick walls.
  • (2) for fire risk from board side only of the concrete or brick walls.
 
 
 
 

Direct fixing - Fire attack from one or both sides / Non-loadbearing & loadbearing
Direct fixing - Fire attack from one or both sides
2-Sided direct fixing details
1-Sided direct fixing details


 
 
 
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