General ceiling construction method
Wooden base
- Wooden
- Ceiling
Describes a general ceiling construction method using a wooden base.
- 公的認定等に関する表記
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- Construction (metal fittings)
- Items a. through d. explain the construction of metal fittings for standard ceilings.When constructing a certified to obtain a certification such as fire proof or resistant
sound insulated etc.
ensure that construction is in accordance with the certificate specifications.
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- a.Gypsum board installation
- [1] When nailing onto a wooden base
use a nail with about 3 times as long as the board thickness
and strike it so that the head is sufficiently flatly embedded.
[2] When screwing
use a screw of length at least 15 mm longer than the board thickness
and tighten the screw head so that it is slightly under the surface of the board.
[3] The rules described in [2] also apply when overlaying by screwing upholstery board onto a wooden base.
[4] When overlaying a board on an underlaid board
use adhesive and staples
etc. together to attach the two.
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- b.Intervals between fasteners
- Nails: Surrounding area of 90-120mm
interval area of 150mm-200mm
Screws: Surrounding area of about 150mm
interval area of about 200mm
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- c. Target nail lengths
- Gypsum board thickness-Nail length
・9.5mm-32mm or more
・12.5mm-40mm or more
・15mm-50mm or more
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- d.Target screw lengths for single sheet laying
- Gypsum board thickness Screw length
・9.5mm-25mm or more
・12.5mm-28mm or more
・15mm-32mm or more
・ 21mm-38mm or more
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- e.Target screw lengths for double sheet laying
- Gypsum board thickness Screw length*
・9.5+9.5mm 38mm or more
・9.5+12.5mm 38mm or more
・9.5+15mm 41mm or more
・12.5+12.5mm 41mm or more
・12.5+15mm 45mm or more
・15+15mm 45mm or more
・15+21mm 51mm or more
・21+21mm 57mm or more
*Indicates the length required to fix the overlay
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- Reference literature
- Please refer to the following literature for details on [b. Intervals between fasteners]
[c. Target nail lengths]
[d. Target screw lengths for single sheet laying]
and [e. Target screw lengths for double sheet laying].
・'Building Construction Standard Specifications and Comments JASS26 for Interior Construction'
Architectural Institute of Japan・
'Public Building Construction Standard Specifications' overseen by the Ministry of Land
Infrastructure
Transport and Tourism Minister's Secretariat
2013 edition.
GL4ヶ条
GLボンドの接着力を確保するために以下の「GL４ヶ条」を遵守してください。
（GL工法に必須の４ヶ条を１つでも省いた場合、剥離現象につながります）
（GL工法に必須の４ヶ条を１つでも省いた場合、剥離現象につながります）
- 【第1条】下地には必ずプライマーを塗布する
プライマー（3倍液）を塗布することでGLボンドが下地に密着し、充分な接着力が得られます。
※プライマー･･･スーパータックＲもしくはスーパータックＡ
- 【第2条】下こすり、コテ圧は充分に！
プライマー（3倍液）を塗布することでGLボンドが下地に密着し、充分な接着力が得られます。
- 【第3条】ダンゴサイズ（塗布量）は充分に！
１回に塗り付けるボリュームを減らすと、接着力を発揮する有効面積が少なくなり、剥離現象につながり危険です。
- 【第4条】塗り付けピッチを守る
タイガーボード（910×1820㎜）に43個以上のGLボンドのダンゴが付きます。塗り付けピッチを広げると、接着面積が少なくなり、接着力が確保できず、剥離することがあります。
