Siniat Single frame partitions (BS 476-22 fire ratings)
7 system references
We are a supply and fit installation contractor, not the manufacturer. Information here is reproduced from manufacturers' literature for reference only; always confirm it directly with the manufacturer before specifying, ordering or installing.
Legacy single-frame C stud partitions rated to BS 476-22 rather than the EN standards; Siniat recommend EN-classified systems as the default route under Approved Document B. No EN fire-state height applies, so Max height here is the cold-state height. Use the filter to narrow by performance or board.
| Reference | Build-up | Fire (mins) | Rw (dB) | Max height (mm) | Thickness (mm) | Duty | Weight (kg/m2) | |
|---|---|---|---|---|---|---|---|---|
| CS50R-12St | 12.5mm Siniat Standard Board each side, CS50/Rx Siniat C studs at 600mm centres, no insulation. | 30 | 36 | 2600 | 75 | Medium | 17 | |
| CS70R-12St | 12.5mm Siniat Standard Board each side, CS70/Rx Siniat C studs at 600mm centres, no insulation. | 30 | 37 | 3200 | 95 | Medium | 17 | |
| CS50R-15St | 15mm Siniat Standard Board each side, CS50/Rx Siniat C studs at 600mm centres, no insulation. | 30 | 38 | 2750 | 80 | Medium | 21 | |
| CS70R-15St | 15mm Siniat Standard Board each side, CS70/Rx Siniat C studs at 600mm centres, no insulation. | 30 | 39 | 3400 | 100 | Medium | 21 | |
| CS70R-12St-25G | 12.5mm Siniat Standard Board each side, CS70/Rx Siniat C studs at 600mm centres, 25mm glass mineral wool. | 30 | 41 | 3200 | 95 | Medium | 17 | |
| CS70R-212St-25G | 12.5mm Siniat Standard Board + 12.5mm Siniat Standard Board each side (inner + outer), CS70/Rx Siniat C studs at 600mm centres, 25mm glass mineral wool. | 60 | 51 | 4000 | 120 | Severe | 33 | |
| CS70R-215St-25G | 15mm Siniat Standard Board + 15mm Siniat Standard Board each side (inner + outer), CS70/Rx Siniat C studs at 600mm centres, 25mm glass mineral wool. | 60 | 54 | 4500 | 130 | Severe | 42 |
System references, build-ups and performance figures are Siniat's own data, reproduced here from Siniat Drywall Manual for reference only, with credit to Siniat.
Each reference links to Siniat's page for the full, current specification - always specify from Siniat's own documentation, HCI will not be held liable for a misspecification where this page has been used in lieu of the true manufacturer.
If you represent Siniat and have a query pertaining to this library, please email info@howeceilings.co.uk. Data retrieved 10 October 2026.
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