Installing Plastic Wall Formwork with Inner/Outer Corners for L-Shaped Walls
how to intasll plastic wall formwork connect inner/outer corner to make L wall forms
3/8/20262 min read
install guide video
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1. Pre-Installation Preparation
1.1 Tools & Materials Checklist
Plastic formwork panels (comply with EN 1993 standards, e.g., Ecoply full plastic composite sheets)
Inner corner blocks (30×30cm or custom-sized) & outer corner clamps
Aligning clamps, round pins, wedges, and Ф12 tie rods
Double nuts (for bottom three rows of tie rods), spirit level, and theodolite
Sponge strips or modified epoxy-polyurethane adhesive (for seam sealing)
Steel keels (200mm spacing), galvanized formwork clips, and plumb bob
1.2 Site Preparation
Mark 20cm control lines and formwork positioning lines on the floor; add verticality control lines 10cm from corners .
Drill Φ6-8 steel reinforcement pins into the floor for positioning; install base plates to prevent formwork displacement .
Clean the installation area thoroughly and apply solvent-based release agent to plastic panels .
2. Core Installation Process
2.1 Formwork Panel Positioning
Align plastic panels with positioning lines, ensuring the inner side of panels coincides with layout marks .
For L-shaped walls, assemble straight panels first, leaving precise gaps for corner connections (0.8-2.5mm recommended) .
2.2 Outer Corner Connection
Place standard plastic panels at the external corner, ensuring flush alignment .
Secure outer corner clamps to panel joints; fasten with round pins and wedges for quick locking .
Install tie rods: Position the first row 20cm above the floor, with subsequent rows spaced 400-450mm vertically . Use double nuts for the bottom three rows to enhance stability .
Apply spiral-wound modified epoxy-polyurethane adhesive to panel seams; press with 0.3-0.6MPa pressure for 3-8 minutes .
2.3 Inner Corner Assembly
Attach inner corner blocks to internal panel joints; use aligning wedges for snug mitre fitting .
Secure corners with locking clips and threaded rods (24" length recommended) ; tighten speed nuts for final pressure .
Reinforce with steel keels (200mm spacing) and ensure panel edges are 压实 with wooden battens .
Seal gaps with sponge strips or closed-cell PE strips; drive pins every 300mm (加密 at seam changes) .
2.4 L-Shaped Wall Reinforcement
Install transverse tie rods through both wall sections, with 10cm spacing from corner edges .
For wall projections over 30cm, add extra tie rods .
Mount adjustable diagonal braces to control verticality; ensure panels are plumb within ±2mm/m .
3. Quality Inspection & Safety Verification
3.1 Verticality & Alignment Checks
Use plumb-bob for initial verification; confirm precision with a theodolite for large-scale projects .
Measure top/bottom offsets at both corners; adjust braces if deviations exceed 3mm .
Inspect joint flatness with a straightedge; maximum gap ≤0.5mm .
3.2 Leakage Prevention Test
Check bottom seals: Ensure rubber/PE strips are tightly fitted without gaps .
Verify tie rod tightness; torque should reach 45-60N·m .
4. Post-Installation Notes
Assign personnel to monitor formwork during concrete pouring; adjust immediately if bulging occurs .
Maintain concrete pressure ≤80kN/m² (for Manto® G3 systems) or 60kN/m² (for RASTO® G2 systems) .
For demolding: Wait until concrete strength reaches ≥1.8MPa (typically 90 minutes post-pouring) .
Clean and store corner blocks, clamps, and pins for reuse; remove concrete residue with sandpaper .