- Variants
- 4
- Thickness range
- 39.5–77 mm
- Documented EI
- EI 60 / EI 90 / EI 120
- Documented Rw
- Not published
DECISION SHEET
When to choose D112b
Best suited to
Two-level CD 60/27 ceilings with the broadest loaded fire range: Standard, EI 60, EI 90 and EI 120.
Compare first with
D112a is the F47 alternative for Standard and EI 60; D113 reduces frame depth to 27 mm but its loaded range ends at EI 60.
Critical site checks
- ✓Allow 54 mm for the two-level frame before adding boards and plenum depth.
- ✓Do not interchange build-ups: EI 120 belongs to D112b with 2 × 25 mm fire boards.
- ✓Calculate loads and spacing, keep the plenum at 2 m without specific engineering and provide joints every 15 m.
Available D112b variants
Choose a specific build-up to open the quantity report with that system already loaded. Only performance values published by the associated technical source are displayed.
| Build-up | Thickness | Boards | Frame | Fire | Acoustic | Max. height | Calculate this variant |
|---|---|---|---|---|---|---|---|
| D112b · 39.5 mm1 × boards per face | 39.5 mm | Knauf board 12,5 | CD profile 60/27 | Not published | Not published | Not published | Calculate this variant |
| D112b · 57 mm2 × boards per face | 57 mm | 2 × Knauf Fire Board 15 | CD profile 60/27 | EI 60 | Not published | Not published | Calculate this variant |
| D112b · 64.5 mm3 × boards per face | 64.5 mm | 3 × Knauf Fire Board 12,5 | CD profile 60/27 | EI 90 | Not published | Not published | Calculate this variant |
| D112b · 77 mm2 × boards per face | 77 mm | 2 × Knauf Fire Board 25 | CD profile 60/27 | EI 120 | Not published | Not published | Calculate this variant |
How to choose a D112b variant
Compare board layer count and thickness according to the fire requirement. Frame, hangers and spacings must follow the selected D11.es build-up.
Current technical source loaded
D11.es Techos suspendidos Knauf (2025) · 2025-09The Ferragut quantity report prepares
- ✓Ceiling boards
- ✓Compatible carrying profiles
- ✓Perimeter and suspension parts
- ✓Screws for every layer
- ✓Joint tape and compound
What this system family contains
The composition comes from the loaded variants and identifies the work items involved before preparing the quantity report.
Questions about Knauf D112b
What is the Knauf D112b system?
D112b.es uses a two-level CD 60/27 frame to form a continuous suspended ceiling. The tool includes Standard, EI 60, EI 90 and EI 120 build-ups.
Which D112b variant should I choose?
Compare board layer count and thickness according to the fire requirement. Frame, hangers and spacings must follow the selected D11.es build-up.
What does the calculator quantify?
The tool estimates complete purchase units for boards, profiles, insulation, screws, joint treatment and accessories compatible with the selected build-up.
Where does the technical data come from?
Performance data comes from D11.es Techos suspendidos Knauf (2025), revision 2025-09. Values that are not published are not inferred.
