Access Doors for Shafts & Utility Zones
Kosavi shaft and duct doors cover every service shaft scenario — from fire-rated riser shafts to electrical panels and plain utility access. Fabricated in GPSP steel with fire-rated options tested to IS 3614:2021.
Four Shaft Door Configurations
Each type is engineered for a specific shaft application — fire compartmentation, electrical access, general service shafts, and plain utility panels.
Fire Shaft Door
Fire-rated steel doors for riser shafts and service ducts requiring compartmentation. Intumescent sealed, tested to IS 3614:2021 / BS 476 Part 22.
- 60 / 120 min fire rating
- Intumescent + smoke seals
- Single & double leaf
Electrical Shaft Door
Sturdy GPSP steel doors for electrical risers, panel rooms, and utility shafts. Available with louvre ventilation panels for cable and switchgear zones.
- Louvre ventilation option
- Flush or rebated frame
- Key lock / cylinder lock
Standard Shaft Door
General-purpose steel shaft doors for mechanical shafts, plumbing risers, and building service zones. Clean finish suitable for front-of-house corridors.
- Powder coated finish
- Customisable dimensions
- Mortise lock standard
Plain Access Door
Economical flat-panel shaft doors for back-of-house and concealed service zones where minimal specification is required.
- Plain flush panel
- Site-paintable primer finish
- Fast lead time
Standard Production Range
Specifications below reflect the standard Kosavi shaft door range. Custom dimensions, ratings, and configurations available on project enquiry.
| Door Leaf Skin | 1.2 mm – 0.8 mm GPSP steel (both faces) |
|---|---|
| Core Material | Mineral wool / rock wool (fire rated) | Honeycomb (uninsulated) |
| Door Leaf Thickness | 46 mm standard |
| Frame Material | 1.2 mm – 1.6 mm GPSP steel |
| Frame Profile | 100 mm × 58 mm standard | custom on request |
| Fire Rating | 60 min 120 min (fire shaft variant) |
| Smoke Seals | Intumescent + smoke seals, 3-sided (fire variant) |
| Max Single Leaf | 1,200 mm (W) × 2,400 mm (H) |
| Max Double Leaf | 2,400 mm (W) × 2,400 mm (H) |
| Opening Direction | Inward / Outward | Single action |
| Standard Hardware | SS butt hinges, cylinder lock / key lock |
| Optional Hardware | Louvre ventilation panel, overhead closer, panic trim |
| Surface Finish | Powder coated (standard) | Primer for site painting |
| Custom Sizing | Available on project order | Lead time 3–5 weeks |
Shaft Door Range
All 14 shaft door variants — fire shaft, electrical shaft, standard, and plain access doors.
Need Shaft Door Specifications?
Contact Kosavi for dimensions, fire rating options, louvre configurations, and project quotation support.