JIS product specification standard

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JIS product specification standard

[Gypsum boards JIS A 6901:2014]
　[Sound absorbing material JIS A6301:2015]

●Gypsum Board - Regular Type (GB-R)

Thickness (mm)		9.5	12.5	15.0
Mass per unit area ( kg/m²)		6.2～9.0	8.1～11.7	9.8～14.0
Specific gravity		0.65～0.90
Moisture percentage(%)		3 or less
Bending fracture load N(kgf)	Length direction	360（36.7）or higher	500（51.0）or higher	650（66.3）or higher
Bending fracture load N(kgf)	Width direction	140（14.3）or higher	180（18.4）or higher	220（22.4）or higher
Incombustibility or exothermicity		2nd grade incombustibility or 2nd grade exothermicity or higher	1st grade incombustibility or 1st grade exothermicity	1st grade incombustibility or 1st grade exothermicity
Thermal resistance m² K/W		0.043 or higher	0.057 or higher	0.068 or higher

●Regular Hard Type Gypsum Boards (GB-R-H).Permanent stocks: 9.5mm and 12.5mm models.

Thickness (mm)		9.5	12.5	15.0
Mass per unit area (kg/m²)		8.6～14.5	11.3～18.9	13.5～22.5
Specific gravity		0.90～1.45
Moisture percentage (%)		3 or less
Bending fracture load N(kgf)	Length direction	500（51.0）or higher	700（71.4）or higher	910（92.8）or higher
Bending fracture load N(kgf)	Width direction	200（20.4）or higher	250（25.5）or higher	310（31.6）or higher
Shock resistance		Diameter of the dent should be 20 mm or less and should not be penetrated by cracks.
Incombustibility or exothermicity		2nd grade incombustibility or 2nd grade exothermicity or higher	1st grade incombustibility or 1st grade exothermicity	1st grade incombustibility or 1st grade exothermicity
Thermal resistance m² K/W		0.026 or higher	0.035 or higher	0.042 or higher

●Fire Resistant Gypsum Boards (GB-F). Permanent stocks: 9.5mm, 15.0mm and 21.0mm models.

Thickness (mm)		12.5	15.0	16.0	18.0	21.0	25.0
Mass per unit area (kg/m²)		9.4～12.4	11.3～14.7	12.0～15.7	13.5～17.6	15.8～20.4	18.8～24.2
Specific gravity		0.75～0.95
Moisture percentage (%)		3 or less
Bending fracture load N(kgf)	Length direction	500 （51.0） or higher	650 （66.3） or higher	680 （69.4） or higher	750 （76.5） or higher	850 （86.7） or higher	1000 （102.0） or higher
Bending fracture load N(kgf)	Width direction	180 （18.4） or higher	220 （22.4） or higher	230 （23.5） or higher	270 （27.6） or higher	320 （32.7） or higher	380 （38.8） or higher
Shock resistance		Diameter of the dent should be 25 mm or less and should not be penetrated by cracks.
Fire resistance		Should not break and fall down.
Incombustibility or exothermicity		1st grade incombustibility or 1st grade exothermicity
Thermal resistance m² K/W		0.052 or higher	0.063 or higher	0.067 or higher	0.075 or higher	0.088 or higher	0.104 or higher

●Gypsum Sheathing Boards (GB-S). Permanent stocks: 9.5mm and 12.5mm models.

Thickness (mm)		9.5	12.5	15.0
Mass per unit area (kg/m²)		6.2～9.0	8.1～11.7	9.8～14.0
Specific gravity		0.65～0.90
Moisture percentage (%)		3 or less
Bending fracture load N(kgf) Note(1)	When dry	360（36.7）or higher	500（51.0）or higher	650（66.3）or higher
Bending fracture load N(kgf) Note(1)	When wet	220（22.4）or higher	300（30.6）or higher	390（39.8）or higher
Peeling resistance during water absorption		Inner gypsum and base paper should not peel off.
Water absorption performance	Water absorption ratio(%)	10 or less
Water absorption performance	Surface side water absorption mass(g)	2 or less
Incombustibility or exothermicity		2nd grade incombustibility or 2nd grade exothermicity or higher
Thermal resistance m² K/W		0.040 or higher	0.052 or higher	0.063 or higher

Note (1): Bending fracture load shall be the value when load is applied to the direction of the length.

●Fire-Resistant Gypsum Board - Structure Type (GB-St)

In addition to compliance with the requirements of fire resistant gypsum board (GB - F), models of any thickness should satisfy the following nailed side resistance requirements.
Nailed side surface load (N)	Both direction of length and direction of width	A-type Note(2)	750 or higher
Nailed side surface load (N)	Both direction of length and direction of width	B-type	500 or higher

Note(2)　Thermal resistance of A-type and mass/specific gravity per unit area shall be the value of the regular Regular Hard Type Gypsum Boards (GB-R-H).

●Gypsum Lath Board (GB-L)

Thickness (mm)		9.5
Mass per unit area (kg/m²)		6.2～9.0
Specific gravity		0.65～0.90
Moisture percentage (%)		3 or less
Bending fracture load N(kgf)	Length direction	180（18.4）or higher
Bending fracture load N(kgf)	Width direction	125（12.8）or higher

●Decorated Gypsum Boards (GB-D). Permanent stocks: 9.5mm and 12.5mm models.

Thickness (mm)		9.5	12.5	15.0
Mass per unit area (kg/m²)		6.2～9.0	8.1～11.7	9.8～14.0
Specific gravity		0.65～0.90
Moisture percentage (%)		3 or less
Bending fracture load N(kgf) Note(3)	Length direction	360（36.7）or higher	500（51.0）or higher	650（66.3）or higher
Bending fracture load N(kgf) Note(3)	Width direction	140（14.3）or higher	180（18.4）or higher	220（22.4）or higher
Discoloration resistance		Deemed to pass the discoloration test if within no. 3 in the gray discoloration scale. Also, the surface should not crack, bulge or wrinkle.
Shock resistance Note(4)		Diameter of the dent should be 25 mm or less and should not be penetrated by cracks.
Incombustibility or exothermicity		2nd grade incombustibility or 2nd grade exothermicity or higher	1st grade incombustibility or 1st grade exothermicit	1st grade incombustibility or 1st grade exothermicity
Thermal resistance　m² K/W		0.043 or higher	0.057 or higher	0.068 or higher

Note(3): Bending fracture load after surface embossing process is set to 75% or more of the value in the table.
Note(4): Should not apply to surface embossing processed models.

●Noncombustible laminated gypsum boards (GB-NC)

Presence or absence of surface decoration		Present	Absent
Mass per unit area (kg/m²)		6.2～9.0
Specific gravity		0.65～0.90
Thickness (mm)		9.5
Moisture percentage (%)		3 or less
Bending fracture load N(kgf) Note(5)	Length direction	360（36.7）or higher
Bending fracture load N(kgf) Note(5)	Width direction	140（14.3）or higher
Discoloration resistance		Deemed to pass the discoloration test if within no. 3 in the gray discoloration scale. Also, the surface should not crack, bulge or wrinkle.	－
Shock resistance Note(6)		Diameter of the dent should be 25 mm or less and should not be penetrated by cracks.	－
Incombustibility or exothermicity		1st grade incombustibility or 1st grade exothermicity
Thermal resistancem² K/W		0.043 or higher

Note(5): Bending fracture load after surface embossing process is set to 75% or more of the value in the table.
Note(6): Should apply to surface decoration processed models, but should not apply to surface embossing processed models.。

●Perforated Gypsum Boards (GB-P) *　

Type	Φ6-22				Φ13.4-24		Random
Thickness (mm) (Tolerance +0.5～0)	9.5		12.5		9.5	12.5	9.5		12.5
Sound absorbing ability Note(7)	0.3S、0.3U				0.3S		0.3S、0.3U、0.5U
Length(mm) (Tolerance +3～0)	910	1,820	910	1,820	910		910	1,820	910	1820
Width(mm) (Tolerance 0～-3)	455 910	910	455 910	910	910		455 910	910	455 910	910
Bending fracture load N(kgf) Note(8)	110 （11.2）or higher		130 （13.3）or higher		40 （4.1）or higher	55 （5.6）or higher	ー
Moisture percentage (%)	3.0 or less

*Perforated gypsum board (GB-P) is made according to the [Perforated Gypsum Board JIS A 6301:2015] standard.
Note(7): S: Without lining material U: With lining material
Note (8): Bending fracture load shall be the value when load is applied perpendicular to the direction of the flow during molding.

●Gypsum Board - Humidity Control Type (GB-R-Hc, GB-D-Hc)

In addition to compliant with the requirements of GB-R and GB-D, models of any type and thickness should satisfy the following moisture control performance requirements.
Hygroscopicity(g/m²)	150 or higher

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