Fire resistant structure (Gapped system)
[Features]
When buildings are deformed due to strong winds, earthquakes, etc., it may cause cloth or paint finishing of the fire resistant wall inside to crack at the seams of gypsum board. By making the top layer board to be gapped, it will reduce the occurrence of this kind of cracks, and also reduce after-maintenance.
[Applications]
Parts of building that easily dislocated such as “staircase hall”, “upper parts of doors”, “T-shaped intersecting parts” etc.
S12 - Gapped spec
Fire resistance certification number |
FP060NP-0289 |
Horizontal sectional view |
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Front view |
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【Fitting example (Wall system example: S12 - Gapped spec)】
- ■Example for installation in staircase hall
Vertical cross-sectional view

- ■T shaped intersection
Horizontal sectional view

- ■Example for installation above a door

Hyper Wall Z - Gapped spec
Fire resistance certification number |
FP060NP-0389(1) [butt joint part] FP060NP-0390(1) [gapped part] |
Horizontal sectional view |
* In case the gap width is 10mm (at least 0.12g per 1mm of gap width)
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Front view |
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Compatible PVC hat-shaped joiner |
Hat dimension |
Manufacturer (shortened name) |
Inner width |
Outer width |
Shinwa |
Sato-Kozai |
Soken |
2mm |
4mm |
- |
HZ-2 |
Hatto-Meji-2×5 |
3mm |
6mm |
- |
- |
Hatto-Meji-3×5 |
3mm |
6.5mm |
- |
HM-3 |
- |
6mm |
8mm |
Jizai-Meji-Hatto-6* |
HZ-6 |
Hatto-Meji-6×5 |
8mm |
10mm |
- |
HZ-8 |
- |
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Internal corners, panel joints |
Panel joints |
Panel joints |
使用箇所 |
* When creating a gap at internal corners, be sure to use “Jizai-Meji-Hatto-6” for the gap between top layer boards. In addition, since the angle of flanges on "Jizai-Meji-Hatto-6" is changeable, it can be used as a panel joiner for the gap between top layer boards.
- ・Material
- PVC plastic
- ・Dimension
- Outer width: 10(±1.0)mm or less
Flange: 21(±2.1)mm Height: 5(±0.5)mm Thickness: 0.5(±0.1) to 1.0(±0.1)mm
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Super Wall A - Gapped spec
When wall strength and surface hardness are required, we recommend "Super Wall A - Gapped Spec” that is excellent in robustness.
- ○Gaps should be treated by “coat with Tiger U Tight* + insert Tiger Joint Felt”
* Coat the intersected part between the gap and the joint of the base layer board
- * The gap after treatment should be approximately approximately 5.5mm deep. If you decide to apply fitting together with Joiner, please use Joiners corresponding to the depth of gaps.
- ○“Super Wall A” has different runner and stud size range. Be careful.
- ○For more details regarding specification and installation methods, please refer to the Standard Instruction Manuals for Construction Works.
Fire resistance certification number |
FP060NP-0383(1) |
Horizontal sectional view |
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