1. What are Wooden Runners (Marain)?
Wooden runners (known in the Egyptian industry as "Marain") are the thick structural timber boards running along the length of a pallet. They act as the primary load-bearing beams to which deck boards are nailed. The density, thickness, and layout of these runners dictate how much weight a pallet can safely carry without bowing or fracturing.
In standard shipping platforms, a configuration of 3 parallel runners is standard (one on each edge, and one centered). For wider platforms or extra heavy industrial loads, 4 or more runners are utilized.
2. Types & Designs of Pallet Runners
- Solid Runners: Continuous solid wood beams. They are strong and easy to manufacture, but limit forklift entry to 2-way access.
- Notched Runners: Solid runners featuring pre-cut rectangular openings (notches) on the bottom edge. These notches allow forklift forks to slide through, turning a two-way layout into a partial four-way access configuration.
- Double/Multi-Runners: Doubling up two runners side-by-side to support extreme payloads exceeding 2,000 kg.
- LVL (Laminated Veneer Lumber) Runners: Engineered composite wood made of pressed wood layers. Extremely strong, highly consistent, but more expensive.
3. Technical Dimensions & Specifications
Standard runner sizes cut at El Negma sawmills:
| Runner Length | Height (Thickness) | Width | Target Pallet Style |
|---|---|---|---|
| 80 cm | 70-90 mm | 35-50 mm | Euro Pallet 120×80 cm |
| 100 cm | 70-100 mm | 35-50 mm | Citrus/Industrial 120×100 cm |
| 110 cm | 80-100 mm | 40-50 mm | Chemical CP Square Pallets |
| 120 cm | 70-90 mm | 35-45 mm | Standard GMA/US Pallets |
4. Best Timber Species for Runners
- Swedish Pine / Spruce (Softwood): The most cost-effective and common choice. Offers an excellent strength-to-weight ratio and reacts perfectly to ISPM-15 heat treatment.
- Beechwood (Hardwood): 30-40% stronger than pine. Excellent for multi-use industrial pallets handling heavy machinery parts. Higher price point.
- Musk Pine (Moski): Highly popular locally in Egypt. Slightly softer than Swedish pine, best suited for local standard pallets or single-use export shipments.
5. Runner Quality & Pallet Safety
Because runners carry the main bending moment, a single failure can lead to catastrophic cargo drops. El Negma ensures quality by checking:
- Moisture Content (MC): Keeping moisture below 20% to prevent wood warping and shrinkage.
- Straight Grain Fiber: Ensuring wood grains run parallel to the runner length. Slanted grains drastically reduce load limits.
- Knot Inspections: Excluding large structural knots in the center of the runners where tension stresses are highest.
By sourcing premium timber and inspecting every runner before assembly, El Negma Pallets Factory guarantees highly dependable platforms. Contact us to order custom-sized timber components or assembled units.