How do the fastener selection criteria differ for geotextile overlaps in high-traffic areas versus low-traffic areas?
The fastener selection criteria for geotextile overlaps can differ significantly between high-traffic areas and low-traffic areas. Here are the key considerations:
High-Traffic Areas:
1.Penetration Depth:
- In high-traffic areas, you’ll need longer fasteners (6-8 inches) to provide a more secure hold and prevent pullout.
- The extra length helps anchor the fasteners deeper into the underlying soil or base material.
2.Holding Strength:
- Increased traffic and loading require fasteners with a higher pullout resistance, typically 30-40 lbs per fastener or more.
- Larger diameter screws or specialized geotextile pins with oversized washers are preferred for these applications.
3.Fastener Spacing:
- Reduce the spacing between fasteners to 12 inches or less along the overlap.
- This creates a denser pattern to better distribute the higher traffic loads.
- Consider using a double or triple row of staggered fasteners for added security.
4.Perimeter Anchoring:
- Anchor the perimeter edges of the geotextile with a tighter fastener spacing, such as every 6-12 inches.
- This helps prevent any shifting or separation of the edges, which are more vulnerable to movement under heavy traffic.
Regardless of the traffic level, it’s important to select corrosion-resistant fasteners, such as galvanized or stainless steel, and follow the geotextile manufacturer’s recommendations for optimal performance and long-term durability.
