Biaxial Geogrid, 2,052 lbf per ft in Both Directions
Gator Grid 30-30 is 30 kN/m ultimate tensile in both directions, woven high-tenacity polyester yarns, PVC coated, with no memory so it lies flat the moment you unroll it. For medium-height retaining walls, raised patios, staircases and subgrade stabilization.
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Ships Same Day From our NJ warehouse |
30 kN/m Both Ways 2,052 lbf per ft, ASTM D6637 |
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No Memory Lies 100% flat when unrolled |
Real Humans (856) 418-4895 |
Why Contractors Ask for Gator Grid 30-30 by Name
A block wall over about three feet is not held up by the blocks, it is held up by the reinforced soil behind them. Geogrid is what turns backfill into a structural mass.
- 2,052 lbf per ft (30 kN/m) ultimate tensile, ASTM D6637, in both directions. Biaxial means the number applies whichever way you run it.
- High-molecular-weight, high-tenacity polyester yarns woven in tension and PVC coated.
- No memory. Alliance rates it to lie 100 percent flat when unrolled, so it does not curl back while you are placing aggregate.
- Medium-height retaining walls, raised patio and staircase internal structure.
- Also for subgrade stabilization and erosion control.
- Four roll sizes from a 4x50 handroll to a 12x150 contractor roll.
Gator Grid 30-30 Specifications
| Ultimate tensile | 2,052 lbf per ft (30 kN/m), both directions, ASTM D6637 |
| Type | Woven high-tenacity polyester yarn, PVC coated, biaxial |
| Roll sizes | 4x50 (11.5 lb), 6x50 (17 lb), 6x150 (42.5 lb), 12x150 (90.5 lb) |
| Install | Anchor and stretch before placing the next layer of aggregate and block |
Where Gator Grid 30-30 Works
Alliance rates Gator Grid 30-30 for:
- Medium-height retaining wall structure
- Raised patio internal structure
- Staircase internal structure
- Subgrade stabilization
- Erosion control and general landscape
Read This Before You Buy Geogrid (Straight From the Manufacturer)
Get an engineer. Alliance states plainly that soil composition varies by location, that global soil stability is not considered in their placement tables, and that a soil analysis must be done before starting any wall project.
Consult a qualified local engineer and obtain a stamped plan before construction and before establishing grid placement.
The label placement tables must not be used on multi-tiered walls, or where there is excess water runoff, seepage or springs, unless a qualified local engineer confirms it.
More grid than the label shows may be required. Alliance states their data sheet should not be construed as engineering advice, and neither should this page.
Not sure if your project qualifies? Call us at (856) 418-4895 before you order. We will give you a straight answer, even if the answer is that this is not the right product for your job.
How to Install Gator Grid 30-30
The full step by step guide is in the official documentation below. Here is the shape of the job:
- Build to the engineered plan, not to a rule of thumb. Grid spacing and embedment length come from the stamped design.
- Lay the grid on the compacted layer at the elevation the plan calls for, running back into the fill.
- Anchor and stretch it so it is taut with no slack or waves before anything goes on top.
- Place and compact the next aggregate layer, then set the next course of block and repeat.
30-30 or 50-50? Which Geogrid Grade
Both are biaxial polyester grids from the same family. The difference is strength and therefore what they are approved for:
- Gator Grid 30-30, 30 kN/m each way. Medium-height walls, raised patios, staircases, subgrade stabilization. Available in a 4x50 handroll.
- Gator Grid 50-50, 50 kN/m each way. High, single and multi-level engineered walls, steep-slope erosion control, roadway and parking structure. No small roll.
- The honest answer is that your engineer picks this, not a website. If nobody has run the numbers on your wall, that is the thing to fix first.