Description

Technical Parameters

Overview

The Yellow construction plywood-commonly known as shuttering board or formwork panels-is a multi-layered timber panel cross-laminated and bonded with moisture-resistant melamine or phenolic resin.

Product Parameters

Specification	Details
Size	2500 × 1250 mm, 2000 × 500 mm, 1500 × 500 mm
Thickness	18 mm (11-ply), 21 mm (13-ply)
Core & Glue	Poplar, Pine, Birch; WBP Melamine / Phenolic Glue
Strength	60 kN/m² load, MOE ≥ 8,500 N/mm², Shear 4.5 N/mm²
Stability	Deflection ≤ 1/400 span; Squareness ≤ 1 mm/m
Moisture & Density	8–12%; 530–680 kg/m³
Surface	120 / 220 g/m² Yellow Melamine Film
Reuse	15–20 uses/side (up to 30 total); Edge absorption <2%
Resistance	Alkali resistant (pH 12–13)

Construction Applications

Slab & Decking Formwork: Fully compatible with H20 timber beams and drop-head shoring systems (e.g., Peri, Doka).

Vertical Wall & Column Systems: Designed for steel-frame modular formwork, supporting lateral concrete pressure in high-rise wall and column construction.

Civil Infrastructure: Suitable for large-volume concrete pours in bridge abutments, highway overpasses, retaining walls, and water treatment facilities.

Foundations & Precast Elements: High-rigidity panels minimize deflection in heavy foundation work and precast production while maintaining a fair-faced concrete finish over 20+ reuse cycles.

Custom Manufacturing Options

Panel Sizes

Lengths up to 3000 mm available to reduce horizontal joints in tall wall formwork.

Edge Sealing & Branding

Multi-layer waterproof acrylic edge coating with optional CNC-printed customer logo for brand identification.

Pre-Drilled Tie-Rod Holes

CNC-machined tie-rod hole layouts produced according to project drawings.

Manufacturing Process

Two-Stage Pressing Process

15-minute cold press followed by 20-minute hot press at 180°C to ensure strong core bonding and prevent delamination.

Boiling Test

Random production samples undergo a continuous 24-hour boiling test to verify WBP phenolic bond strength.

Thickness Calibration

Dual-sided sanding maintains a thickness tolerance of ±0.3 mm for accurate panel alignment.

Commercial Supply Support

MOQ: 1 × 40HQ container, typically loaded with 18 pallets (approximately 1,200 panels of 21 mm thickness).

Lead Time: Standard production completed within 21 calendar days, supported by 4 production lines with a monthly capacity of 8,000 m³.

Technical Documentation: Load calculation sheets, span tables, and Material Safety Data Sheets (MSDS) available to support project approval.

Packing Method: Export pallets are steel-strapped and protected with corner guards and waterproof wrapping to reduce transit damage.

Shipment Support: Full container loading plans and shipping mark labeling are prepared for easier warehouse handling and destination sorting.

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Compliance & Certifications

European Union Market Access: Fully certified under EN 13353 (Type SWP/3 for exterior conditions) and EN 13986.

North American Standards: Complies with EPA TSCA Title VI and CARB Phase 2, with formaldehyde emissions below 0.05 ppm.

Independent Batch Verification: Factory production control and physical properties are audited by SGS and Bureau Veritas (BV). Batch-specific third-party test reports validating bonding shear strength (EN 314-2 Class 3) and moisture content uniformity are provided with every shipment.

Sustainable Supply Chain: Certified FSC or PEFC Chain of Custody (CoC) documentation is available upon request, ensuring 100% traceable, legally logged timber.

FAQ

Q: What joist spacing is recommended for 18 mm and 21 mm panels?

A: For 18 mm panels, a joist spacing of 300–400 mm is generally recommended, while 21 mm panels can typically support spacing up to 500 mm, depending on the concrete load and project design.

Q: How can the panels achieve the maximum number of reuse cycles?

A: Apply a release agent before each concrete pour, clean the surface immediately after stripping, and store panels flat in a dry area away from direct sunlight.

Q: What happens if panel delamination is found after delivery?

A: If delamination exceeding 50 mm in bond length is confirmed under EN 314-2 testing and caused by manufacturing defects rather than improper storage or handling, replacement panels or credit will be provided for the affected quantity after joint inspection and documentation.

Q: Can these plywood panels be used in hot, humid, or cold climates?

A: Yes. The phenolic film and waterproof bonding system allow the panels to perform reliably in environments ranging from approximately -20°C to +50°C, including tropical and high-humidity construction sites when properly stored between uses.

Q: What concrete surface finish can be expected?

A: The smooth yellow melamine film produces a clean and uniform fair-faced concrete finish with minimal surface imperfections.

Q: Can replacement panels match previous production batches?

A: Yes. Production records, raw material specifications, and manufacturing parameters are retained for every batch, allowing repeat orders to maintain consistent dimensions, bonding performance, and surface quality.

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