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Tensar BX1200 Biaxial Geogrid

Tensar BX1200 Biaxial Geogrid - 12.5' x 246' Roll

$1,276.30


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SKU TENSAR-BX1200

Tensar BX1200 Biaxial Geogrid - 12.5' x 246' Roll
 
Model: BX1200
Brand: Tensar
Size: 12.5' x 246'
Square Feet / Roll: 3,075
Downloads: BX1200 Specification Sheet
Installation Guide: Download Installation Guide
 
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PRODUCT INFO:

  • Tensar BX Geogrids are created using precise blends of polypropylene, copolymers and additives to resist high, short-term dynamic loads or moderate loads over longer time periods.
  • BX Geogrids have been used for mechanical ground stabilization in over half a million projects worldwide, including roads, reinforced foundations and working platforms.

DOWNLOADS:

  • BX1100 Specification Sheet
  • BX1200 Specification Sheet
  • BX1300 Specification Sheet
  • BX1500 Specification Sheet
  • Download Installation Guide

TENSAR BIAXIAL GEOGRID SHIPPING TIME

Tensar geogrid orders by default ship next day (from GA) (M-F) if order is placed before 12:00 noon eastern time zone. Tensar Biaxial geogrid also ship from other regional warehouses depending on purchase location.

Transit times displayed in the map are listed in business days, are approximate and are specific to the Tensar line. The day that the order is shipped is not counted as a transit day.

Geogrid rolls ship via LTL freight. For expedited shipping rates please call:
(800) 748-5647


The transit times displayed on the map is for our free shipping option.

Tensar BX1200 Biaxial Geogrid: The Engineer’s Field Guide

Subgrade Improvement • Base Stabilization • Pavement Performance

Tensar BX1200 Biaxial Geogrid: Product Overview and Highlights

A practical overview of where BX1200 fits, how it works, and how to install it correctly—plus a real-world case study and answers to common spec questions.

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  • Biaxial interlock & confinement
  • Reduces rutting & differential settlement
  • Improves constructability on weak subgrades
  • Can enable granular layer reductions (project-dependent)
BX1200 geogrid installed beneath aggregate base on a county roadway
Representative roadway installation with geogrid placed at the subgrade–base interface.

What BX1200 Is—and When to Use It

Tensar BX1200 is a biaxial geogrid engineered to interlock with aggregate in both principal directions. In practice, that interlock confines stone, limits lateral spread, and increases layer stiffness—helping pavements, working platforms, and access roads perform better on weak or variable subgrades.

  • Primary applications: unpaved/temporary roads, permanent road base stabilization, laydown/working platforms, and foundations/slabs-on-grade.
  • Why it matters: improved bearing capacity and reduced rutting can translate to better constructability and, in many designs, material efficiency.

How Biaxial Geogrids Improve Performance

The key mechanisms are interlock and confinement. As the aggregate seats into the apertures, the ribs and junctions resist movement under load. This raises the composite layer’s stiffness (higher resilient modulus) and lowers permanent deformation—observable as reduced rutting and fewer soft spots during construction.

Design cues
  • Place at subgrade–base interface
  • Match aperture size to aggregate gradation
  • Size lift thickness via CBR/Mr & traffic
  • Use single or multiple layers as needed
Field outcomes*
  • Lower rut depths
  • Improved haulability after rain
  • Faster production on weak subgrades
  • Potential base reductions (project-specific)

*Actual performance depends on soils, traffic loading, section design, and QC.

BX1200 geogrid being rolled out on prepared subgrade
Roll out on proof-rolled subgrade; keep sheets aligned and wrinkle-free.
Roll of Tensar biaxial geogrid ready for installation
Stage rolls to minimize handling; avoid pre-tensioning in the field.

Selection & Spec Guidance (Plain-English)

  • Aggregate: well-graded, crushed stone seats into apertures and bears on ribs. Avoid rounded, single-size gravels.
  • Overlaps: typically 1–3 ft depending on subgrade strength and trafficking direction (follow project specs).
  • Placement: at the subgrade–base interface for stabilization; consider multiple layers for very weak soils/heavy loads.
  • QC checks: alignment, overlap, wrinkle removal, and aggregate fully seated into the grid before trafficking.

Need manufacturer data and design software? See current Tensar biaxial geogrid literature for nominal properties and tools.

Installation Best Practices (Step-by-Step)

  1. Prep subgrade: strip organics, proof-roll, plane to grade, and address pumping/soft zones.
  2. Lay geogrid: unroll square to alignment, remove wrinkles; pin/sandbag as needed in wind.
  3. Overlap: follow plans; increase overlap where subgrade is very weak or trafficking crosses seams.
  4. Place aggregate: cascade from the bucket; avoid driving directly on exposed geogrid.
  5. Initial lift & compaction: spread uniformly (often 6–12" per design) and compact to specified density before opening to construction traffic.
  6. Verify: check seating into apertures and surface uniformity; correct voids/bridging before subsequent lifts.

Case Study: County Access Road on Silty Subgrade

Setting: 0.8-mile gravel access road; subgrade CBR ≈ 2–3; frequent rain events; rutting > 2" after initial trafficking.

Issue: Original section (12" base over separation fabric) pumped and rutted during early construction, slowing deliveries.

Solution: Install a single layer of biaxial geogrid at the subgrade–base interface with 2–3 ft overlaps, revise base to 8", and enforce bucket-cascade placement and lift-by-lift compaction.

Outcome: Ruts reduced to < 0.5" through multiple rain cycles; road opened to hauling without lane closures. Production improved thanks to a stiffer working platform. Aggregate quantity decreased versus the original concept while maintaining serviceability.

Results vary. Always verify with geotechnical data, traffic projections, and current manufacturer guidance.

Frequently Asked Questions

Is BX1200 considered a “Type 2” biaxial geogrid?

BX1200 is commonly used where a Type 2 biaxial is specified. Always confirm current product data (e.g., tensile at low strains, junction efficiency, aperture dimensions) meets your submittal requirements.

What aggregate works best with biaxial geogrids?

Well-graded, crushed stone that can seat into apertures and bear on ribs. Rounded, single-size gravels limit interlock and are not preferred.

Where should I locate the geogrid within the pavement section?

Typically at the interface of subgrade and aggregate base for stabilization. In very weak soils or under heavy traffic, designers may include additional layers within the base.

How much overlap do I need?

Common practice is 1–3 ft depending on subgrade strength, seam orientation to traffic, and site conditions. Follow the plans and the latest manufacturer guidance.