High-Tensile Profiled Decking Sheets
Permanent Formwork • High Load Bearing Composite Slabs
Advanced Permanent Steel Formwork for High-Speed Slab Construction
Composite Decking Sheets are heavy-duty, cold-rolled profiled galvanized steel sheets engineered to serve as permanent formwork and bottom positive tensile reinforcement for cast-in-place concrete floor slabs. During the construction phase, the profiled steel deck acts as a high-capacity safe working platform; once the concrete cures, the embossed ribs mechanically interlock with the slab, forming a unified composite structural system.
Gapat Engineering manufactures decking sheets from high-yield galvanized steel coils with engineered trapezoidal profiles. By eliminating temporary timber propping, our decking systems dramatically accelerate construction cycles, reduce on-site crane and manpower overheads, and lighten overall structural foundation loads.
Eliminates Shuttering
- No temporary wooden shuttering or props required
- Clean, uncluttered lower floor workspaces during casting
- Immediate safe platform for construction personnel
- Zero waiting time for slab de-shuttering or curing removal
Composite Action & Strength
- Precision mechanical embossments along vertical ribs
- Locks concrete and steel together under live loads
- Functions as tensile reinforcement, cutting rebar steel volume
- High resistance to slab deflection and shear failure
Dead Weight Reduction
- Trapezoidal troughs displace concrete volume by up to 20%
- Substantially lowers dead loads transferred to columns & footings
- Enables longer beam spans and larger open floor spaces
- Substantial savings on total foundation material costs
High-Speed Construction
- Multiple building tiers can be sheeted and poured in parallel
- Simple screw or stud-welded fastening to primary beams
- Lightweight bundled packs easily lifted by tower cranes
- Reduces total project construction time by weeks or months
Decking Sheet Technical Specifications
IS 277 • ASTM A653 • SDI Standards| Material Grade | High-Tensile Cold-Rolled Galvanized Steel (Yield: 245–350 MPa / Tensile: 450 MPa) |
|---|---|
| Thickness Options | 0.80 mm, 1.00 mm, 1.20 mm, up to 1.60 mm BMT |
| Profile Depth (Rib Height) | 44 mm to 75 mm deep trapezoidal profiles |
| Pitch of Profile | 150 mm to 300 mm rib center spacing |
| Effective Cover Width | 900 mm to 1020 mm |
| Zinc Coating | 120 GSM to 275 GSM Hot-Dip Galvanized coating |
| Unpropped Spans | Up to 2.5m to 3.5m (Up to 5.0m+ with temporary intermediate props) |
Applications & Structural Usages
Multi-Story Commercial Towers
PEB Factory Mezzanines
Multi-Level Car Parking Decks
Data Centers & Control Rooms
Heavy Industrial Storage Floors
Manufacturing Operating Platforms