INSTALLATION
INSTALLATION INSTRUCTIONS
1)FIXING TO SUPPORTS : Secure the PROSER Heavy-Rib Sheets to temporary timber supports or to rebar supports using nails or tie wires, ensuring that the peaks of the V-Ribs point toward / into the first concrete pour.
2) FIRST POUR : Pour & compact the first section. Let the concrete paste form a mechanical anchor pattern as it presses against the PROSER Heavy-Rib Expanded Mesh.
3) SECOND POUR : Without removing the mesh, cast the adjacent concrete section directly against the back of the PROSER Heavy-Rib Expanded Mesh.
DETAILS OF SUPPORTS FOR CONSTRUCTION JOINTS
Raft / Other Slabs with Higher Thickness
Supports For Wall Construction Joints
Typical Arrangement as Permanent Soffit Formwork
For Pour Seperation Between Different Grades of Concrete
SIDE LAPPING OF PROSER HEAVY-RIB EXPANDED MESH SHEETS
Lap Edge Ribs only : approximately 12 mm overlap
Tie the lapped edge ribs at 300 mm c/c using binding wires (150 mm c/c for soffits)
END LAPPING OF PROSER HEAVY-RIB EXPANDED MESH SHEETS
Typical end lapping of sheets for wall stopends & construction joints : Butt ends together with zero overlap
In case overlapping is needed, it should range between 25 mm to 50 mm: tie the sheets tightly together t minimize the gap & nail OR tie the sheets to the timber supports using binding wires.
CONCRETING / PLACEMENT
✔ Use correct length of pipe trunking or tremie tube.
✔ Place concrete at least 500 mm from the stop ends of the PROSER Heavy-Rib.
✔ Allow concrete to naturally flow up toward the stopend of the PROSER Heavy-Rib.
❌ Don’t dump the concrete from excess height.
❌ Don’t discharge concrete directly against the stop ends of the PROSER Heavy-Rib.
❌ Don’t allow concrete to pile up against the stopend of the PROSER Heavy-Rib.
CONCRETING / VIBRATION COMPACTION
Standard vs. Reduced Vibration Zones
Standard Vibration Zone (> 450mm from face):
- Normal continuous internal vibration (poker) is safe to use here.
- Adequately compacts the bulk of the concrete mix without stressing the mesh
Reduced Vibration Zone (Within 450mm of face):
- Prohibit continuous or excessive vibration in this boundary.
- Limit action to intermittent 5-second bursts.
- Stop vibrating immediately once cement grout bleeds through the mesh keyholes
Critical Rules for Compaction
- Never touch the mesh: Do not allow the vibrator poker to make direct contact with the PROSER Heavy-Rib sheet or steel reinforcement near the face.
- No external vibrators: External formwork vibrators are strictly not recommended for use with PROSER Heavy-Rib systems.
- Soffit applications: Hand tamping is strongly preferred over mechanical internal vibration when PROSER Heavy-Rib is used horizontally as soffit formwork.
Vertical Applications (Walls and Stop-Ends)
- Pour rate limits: Restrict the vertical rise to 1.0 to 1.5 metres per hour to prevent excessive hydrostatic pressure against the mesh.
- Layer depth: Deposit concrete in uniform horizontal layers between 300mm and 500mm deep.
- Vibrator insertion: Insert the poker vertically into the layer, holding it steady for 5 to 15 seconds in the standard zone.
- Mesh observation: Watch the PROSER Heavy-Rib face during compaction; stop vibrating the moment a creamy cement grout paste begins to emerge through the mesh openings.
Horizontal Applications (Slabs and Soffits)
- Discharge direction: Point the concrete delivery hose away from the mesh face, allowing the mix to flow naturally over it rather than striking it directly.
- Compaction method: Use a vibrating screed or hand tampers across the top surface rather than a deep internal poker.
- Poker restriction: If an internal poker must be used due to slab depth, angle it horizontally and keep it strictly in the upper half of the concrete layer.