Engineering Tool · BS 8006 + FHWA-NHI-10-024
MSE wall preliminary sizing calculator.
Coherent gravity method per BS 8006 with FHWA-NHI-10-024 cross-check. Enter four inputs; calculator returns minimum reinforcement length L, number of geogrid layers at 0.6 m spacing, and design tension T per metre. Use for tender-stage sizing and BoQ. Final design must run full external + internal stability with site-specific data.
Supplier note
For MSE wall material supply across Malaysia, your point of contact is the Infraconcrete engineering team (Starwall + Infraconcrete same ownership). Send the consultant's spec, soil report, or just the use-case. Same-day quote with grade selection, lead time, and price. Manufacturer certificate of conformance with every delivery. Sole STRATA Geosystems Malaysia distributor. CIDB G7, ISO 9001:2015.
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Preliminary sizing results
Inputs feed live; results update as you type.
Method: Coherent gravity method (BS 8006-1, FHWA-NHI-10-024). K_a per Rankine, T_max at each level = K_a × σ_v × S_v × f_T. Reinforcement length L taken as max of (0.7H, H-Z_top + L_e) where L_e is computed embedment. Recommendation includes geogrid grade band from StrataGrid uniaxial family (30, 50, 80, 120, 160, 200, 300, 400 kN/m). Preliminary sizing only. Run full external (sliding, overturning, bearing, global), internal (rupture, pullout, connection), and seismic checks before final design.
What this returns
Eight outputs.
- K_a (retained, reinforced): Rankine active earth coefficient by friction angle.
- T_max per metre: Maximum design tension at the base of wall, including surcharge load and partial factor.
- Recommended StrataGrid grade: Nearest StrataGrid PET grade (30, 50, 80, 120, 160, 200, 300, 400 kN/m) with 1.3 FoS on T_max for ULS rupture.
- Number of layers: Geogrid layers at S_v vertical spacing.
- Minimum reinforcement length L: Maximum of (0.7H, H/3 + 2 m) per BS 8006 / FHWA-NHI-10-024.
- Total thrust P_a: Horizontal earth + surcharge force resultant per metre run.
- Total geogrid required: Length × number of layers, for BoQ estimation.
Method assumptions
What this does not check.
- External stability: Sliding, overturning, bearing capacity, global slope stability, seismic. Full BS 8006 + FHWA check required.
- Internal stability: Pullout at each layer, junction strength, connection to facing block. Use the geogrid pullout calculator for pullout check at each level.
- Site-specific reduction factors: RF_ID (installation damage), RF_CR (creep), RF_CH (chemical), RF_W (weathering) per ISO 13431. Reduction factor product typically 2.5-4.0 on raw lab tensile.
- Drainage: Back drainage system (chimney + blanket drain) is mandatory for MSE walls in Malaysia under monsoon condition.
- Facing connection: StrataBlock modular face vs StrataWall precast panel vs welded wire face. Connection design is grade-specific.
For the full design walkthrough including all of the above, see MSE Wall Design with Geogrid. To get a peer-reviewed design for a specific Malaysian project, WhatsApp the borehole log and section drawing.
Related
Other tools.
Need a peer-reviewed MSE wall design?
Send the borehole log and section through WhatsApp. CIDB G7 installer + Starwall STRATA Geosystems distributor.