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What's "Shear Wall"? -For
safe and comfortable living spaces |
| Required shear walls for wooden buildings |
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If a structure of wooden buildings consists of columns, beams, and bases, the
building can be easily deformed. Therefore, if a house is constructed by only
those frame members, the house is not strong enough to resist horizontal force
caused by earthquakes or typhoons. So, in order to prevent any deformation which
may occur in wooden buildings, it is important to either (1) attach "diagonal
bracings" between two columns, or (2) attach "structural wall boards" with screws
to frames. The wall with the ability to resist such deformation caused by horizontal
forces is defined as a shear wall.
| "Plasterboard" can be used for shear walls. |
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Plasterboards do not offer only fire resistance performance
but also many other performances. Plasterboards (thickness of more than 12.5 mm)
are approved for use in shear walls which conform to the notification of Ministry
of Land, Infrastructure and Transport Government of Japan. Yoshino's 12.5 mm Tiger
Glass Rock receives a high evaluation as a wall board for shear walls.
Conventional Construction
12.5 mm Plasterboard: Resistance Factor 1.0
Two-by-Four System
12.5 mm Plasterboard: Resistance Factor 1.5 |
| Resistance Factor: |
Resistance factor is used for rating the strength of shear walls.
A shear wall with resistance factor 1.0 can bear horizontal forces up to 200 kgf
per 1 m in width. |
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| Tiger Glass Rock is a wall board suitable for use in
shear walls |
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Tiger Glass Rock consists of gypsum core incorporating glass fibre, and further
glass mat embedded in both the face and back of board. This innovative glass fibre
reinforced plasterboard provides enhanced "pliability" and "ductility.
Tiger Glass Rock functions superbly as a shear-resisting material in shear walls
because of its excellent properties of the glass fibre and glass mat
 12.5
mm Tiger Glass Rock
- Conventional Construction: Resistance Factor 1.0
- Two-by-Four System: Resistance Factor 1.5
| Shear Wall incorporating Tiger Glass Rock |
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We have been carrying out the research on performances of Tiger Glass Rock as
a shear-resisting material with Professor Sakamoto at the Graduate School of Engineering
of the University of Tokyo in Japan. We have been analyzing stiffness and elasticity
of Tiger Glass Rock as shear-resisting materials.
Testing Equipment for Structural Performance of Shear Walls
- Maximum Load: 10,000kgf
- Maximum Vibration Amplitude: ±200mm
- Maximum Size of Test Specimen: 3,000 (width) × 2,730 (height) mm
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