MSE wall specification template: tender clauses for Malaysian projects.

Eight sections of a proper MSE wall specification

1. Scope and reference standards
2. Pre-qualification of suppliers
3. Materials
4. Design requirements
5. Workmanship and construction sequence
6. Quality assurance and acceptance criteria
7. Drawings and deliverables
8. Inspection and maintenance handover

Each section below has a description, the standard clauses that should be present, sample wording, and the common mistakes to avoid.

Section 1: Scope and reference standards

The opening section defines what the contract covers and what governing standards apply.

Sample clause: Scope

The Works under this Section comprise the design, supply, delivery, installation, testing and commissioning of mechanically stabilized earth (MSE) retaining walls as shown on the Contract Drawings and described herein. The Works include foundation preparation, precast concrete facing panels, steel soil reinforcement, deadman anchor blocks where specified, engineered backfill, drainage system, and capping. The design life shall be __ years.

Sample clause: Reference standards

All design, materials and workmanship shall comply with the following standards in their current applicable editions, supplemented by the Project-specific requirements of this Specification:

• BS 8006-1:2010, Code of practice for strengthened/reinforced soils and other fills (primary design code)
• FHWA NHI-10-024, Mechanically Stabilized Earth Walls and Reinforced Soil Slopes (technical parametric reference)
• JKR Standard Specification for Earthworks (workmanship, materials)
• JKR Standard Specification for Structural Concrete (precast panel + deadman block concrete)
• BS 8500-1:2015, Concrete - Specification, performance, production and conformity
• BS EN ISO 1461:2009, Hot-dip galvanized coatings on fabricated iron and steel articles
• BS EN 14399, High-strength structural bolting assemblies for preloading
• MS 1233:2016, Specification for drainage
• BS 1377, Methods of test for soils for civil engineering purposes
• Where conflict exists between standards, the more onerous requirement shall apply.

Common mistakes here

• Citing "applicable standards" without listing them, leaving room for argument later
• Citing only one standard (e.g., BS 8006 alone) without the parametric backup (FHWA), the materials clause (JKR), and the durability spec (BS 8500)
• Not specifying the design life as a numeric value, instead saying "industry standard"
• Not specifying the version year of each standard, allowing contractors to use outdated editions

Section 2: Pre-qualification of suppliers

The pre-qualification section establishes who can bid. Critical for projects above modest scale.

Sample pre-qualification criteria

Tenderers shall meet the following minimum criteria. Documentary evidence shall be submitted with the tender:

1. CIDB licence: G7 or higher in CE21 (Civil Engineering, MSE Walls) category, or equivalent JKR-listed contractor classification
2. Track record: Minimum __ MSE wall projects completed within the past 10 years, with at least __ projects above __ m² each. Project list with client references shall be submitted
3. Design capability: Design Engineer to be a registered Professional Engineer (Ir.) with BEM Malaysia, minimum 10 years' MSE wall experience
4. Manufacturing: In-house precast manufacturing facility, or named subcontractor with ISO 9001 certification and verified production capacity
5. Quality system: ISO 9001:2015 certification for design, manufacturing and construction
6. Financial standing: Annual turnover not less than RM __ over the past 3 years, supported by audited accounts
7. Insurance: Professional Indemnity Insurance not less than RM __, Public Liability not less than RM __, valid through the Defects Liability Period
8. In-service performance: At least 3 reference projects from the same proposed system with documented in-service performance over 10+ years, including settlement and facing displacement data where available

Why these criteria matter

Each criterion filters out a failure mode. The CIDB licence filters unlicensed contractors. The track record filters first-time suppliers who'll learn on your wall. The PE registration ensures someone with legal accountability for the design. The manufacturing requirement filters traders who'll subcontract panels to a fabricator they've never used. The in-service performance criterion is the killer one: it requires evidence that the contractor's walls actually stand up over time.

Section 3: Materials

The materials section specifies the components and their acceptance criteria.

3.1 Precast concrete facing panels

Facing panels shall be cast from Grade 30 minimum concrete per BS 8500 exposure class XC2 (rear face, buried) and XC3 (front face, exposed), or marine equivalent XS2/XS3 where specified. Reinforcement: hot-dip galvanized or epoxy-coated to BS EN ISO 1461 minimum 70 μm zinc coating. Cover: not less than 35 mm to the soil face, 40 mm to the exposed face, 60 mm for marine exposure. Geometry: inverted-T or octagonal section per project drawings, dimensional tolerances ±5 mm in any direction.

3.2 Soil reinforcement (tendons or strips)

Reinforcement shall be hot-dip galvanized carbon steel deformed bar to BS 4449 Grade B500B or equivalent, with galvanizing per BS EN ISO 1461 minimum coating mass 600 g/m² (approximately 85 μm thickness). Sacrificial-thickness allowance per BS 8006 Annex B for the specified design life. Each batch supplied with mill test report including yield strength, ultimate tensile strength, and elongation, plus galvanizing certificate.

3.3 Deadman anchor blocks (for anchored MSE only)

Deadman anchor blocks shall be precast Grade 30 minimum concrete to BS 8500 exposure class XC1/XC2 as appropriate, dimensions per project drawings, reinforced for the design tendon load capacity with appropriate cover. Connection detailing per project drawings, with Grade 8.8 nut and washer for tendon-to-block connection.

3.4 Backfill

Backfill within the reinforced zone shall be granular material with friction angle phi prime not less than 34 degrees at 95 percent modified Proctor density, gradation envelope per BS 8006 Annex A:

• 100 percent passing 75 mm sieve
• 40 to 100 percent passing 20 mm sieve
• 15 to 75 percent passing 5 mm sieve
• 5 to 45 percent passing 0.6 mm sieve
• 0 to 15 percent passing 0.075 mm sieve (fines)
• Plasticity index of fines fraction: not greater than 6
• Aggressivity: non-aggressive per BS 8006 Annex B (chloride below threshold, resistivity above 3,000 ohm-cm)

Crusher run from approved Malaysian quarries meeting the above specification shall be acceptable.

3.5 Drainage materials

Drainage layer shall be geocomposite drainage panel comprising a cuspated or geonet polymer core not less than 6 mm thick, sandwiched between nonwoven geotextile filters of mass not less than 200 g/m² with characteristic opening size O90 between 100 and 200 micrometres. In-plane permeability not less than 1 litre per second per metre width under 100 kPa overburden. Collection pipe: 100 to 150 mm internal diameter perforated UPVC or HDPE pipe to MS 1233.

Section 4: Design requirements

The design section establishes loadings, factors of safety, and design checks the contractor's design must satisfy.

4.1 Design life

Design life: __ years (typical values: 75 for general infrastructure, 100 for highways, 120 for bridge abutments or heritage projects).

4.2 Design loadings

Design loadings shall include:

• Self-weight of reinforced backfill, unit weight 20 kN/m³ characteristic
• Self-weight of facing panels per supplier data sheet
• Live load surcharge on retained surface: __ kPa (typical values: 12 kPa for highway, 20 kPa for commercial, 50 kPa for industrial)
• Dead load surcharge: per project drawings
• Bridge bearing loads: per project drawings (for abutment walls)
• Seismic horizontal coefficient: __ (typical values: 0.05 peninsular, 0.10 Sabah)
• Cyclic rail loading: per project drawings (for rail-corridor walls)
• Hydrostatic loading: design groundwater table per project drawings, plus saturation case

4.3 Design checks

The Contractor's Design Engineer shall demonstrate compliance with the following limit states per BS 8006-1:2010:

• External stability: sliding, overturning, bearing, global slope stability, all with FoS not less than design targets (typically 1.5 sliding, 2.0 overturning, 3.0 bearing, 1.5 global)
• Internal stability: tensile rupture of reinforcement, pullout from resistant zone, connection capacity at facing, all with appropriate partial factors
• Settlement: total and differential settlement within tolerable budget
• Durability: reinforcement and concrete elements sized for the design life with sacrificial-thickness and cover allowances
• Drainage: design groundwater conditions handled without exceeding the design lateral pressure

4.4 Design deliverables

The Contractor shall submit for Engineer's approval before construction:

• Design calculations covering all the checks in 4.3, signed by the Design PE
• General arrangement drawings: plan, elevation, cross-sections
• Detailed drawings: panel schedule, reinforcement schedule, deadman positions, drainage layout
• Materials specifications: panel concrete mix, reinforcement bar spec, backfill spec
• Method statement: construction sequence, plant, equipment, programme
• Quality plan: inspection points, test frequencies, acceptance criteria, records
• Monitoring plan: instrumentation, readings schedule, trigger levels

Section 5: Workmanship and construction sequence

The workmanship section governs how the wall is built. Tightly tied to the construction sequence (see Construction sequence article).

5.1 Foundation preparation

Foundation level shall be excavated to design founding level, inspected for bearing capacity verification, and remedied as required. Levelling course of lean-mix concrete Grade 15 minimum or compacted granular fill, levelled to plus or minus 10 mm of design level over a 3 m chord.

5.2 Panel placement

Panels shall be set on neoprene bearing pads at the design positions, plumbed, aligned, and braced against tip-over. Tolerances: plumb plus or minus 5 mm over panel height; line plus or minus 10 mm over 10 m chord; cumulative wall plumb 1:200 maximum. Vertical joints between panels gasket-sealed with foam or rubber strip.

5.3 Reinforcement installation

Reinforcement bars shall be laid horizontally normal to the facing at the design depths and spacings. Tolerances: bar length plus or minus 100 mm; orientation plus or minus 5 degrees; vertical spacing plus or minus 25 mm. Connection to facing tightened to the design torque using calibrated torque wrench, with witness mark.

5.4 Backfill placement and compaction

Backfill shall be placed in lifts of 200 to 300 mm loose thickness. Compaction shall achieve 95 percent of modified Proctor maximum dry density at optimum moisture content plus or minus 2 percent. Within 1 m of the facing: hand-operated plate compactor or mini-vibratory plate only. Beyond 1 m: full-size vibratory roller permitted. No vehicles permitted on uncompacted lifts.

5.5 Drainage installation

Drainage layer panels shall be installed against the back of the facing in vertical strips with 150 mm vertical overlap and 50 mm horizontal overlap. Collection pipe at toe shall be laid at design gradient minimum 1:200, surrounded by free-draining stone 100 mm minimum thickness, wrapped in geotextile filter. Discharge outlets at design positions, with flow tested before backfill enclosure.

Section 6: Quality assurance and acceptance criteria

The QA section is what separates a credible specification from a wishful one. Each acceptance criterion must be measurable.

6.1 Materials acceptance

6.2 Workmanship acceptance

6.3 Final acceptance

Before practical completion, the following shall be demonstrated:

• All QA records compiled and certified by the Contractor's QA Engineer
• As-built drawings showing actual constructed positions, dimensions, materials used
• Drainage flow test at every outlet, with bucket-and-stopwatch verification
• Survey of facing geometry against design tolerances
• Installation of monitoring instrumentation per Section 8
• Baseline monitoring readings captured
• Maintenance manual delivered to the Asset Owner

Section 7: Drawings and deliverables

Drawings to be supplied (for design approval, construction, and as-built):

• General arrangement (plan, elevation, section)
• Foundation and ground improvement details
• Panel schedule and panel-by-panel layout
• Reinforcement layout (depth, spacing, length, deadman positions)
• Drainage layout (drainage layer, collection pipe, outlets)
• Coping and capping details
• Architectural finish detail (if applicable)
• Monitoring instrumentation layout
• Construction sequence drawings (per lift, showing temporary works)

Plus design calculations document, materials data sheets, manufacturer certificates, method statement, quality plan, and HSE plan.

Section 8: Inspection and maintenance handover

Monitoring instrumentation shall be installed per the approved Monitoring Plan, with baseline readings taken before site handover. Reading schedule:

• Construction phase: daily on settlement, weekly on inclinometers + survey
• 0 to 3 months post-completion: weekly all instruments
• 3 to 12 months: monthly
• Year 2 to 5: quarterly
• Beyond year 5: annually, plus event-triggered after major rainfall or seismic event

The Contractor shall deliver to the Asset Owner at completion: complete QA records, as-built drawings, monitoring instrumentation as-built, baseline readings, maintenance manual, recommended inspection schedule, and a 12-month defects liability commitment covering all delivered Works.

Common specification mistakes and how to avoid them

Mistake 1: Generic "industry standard" references

Pattern: "The Contractor shall design and construct the wall to industry standard." This means nothing legally. Always cite specific standards by name and version year.

Mistake 2: Performance-only specification

Pattern: "The wall shall achieve a factor of safety of 1.5 against sliding." Without prescriptive clauses on materials, workmanship, and acceptance, this is unverifiable until the wall fails. Mix performance and prescriptive clauses.

Mistake 3: Open-ended design life

Pattern: "Design life: long-term." Always specify a numeric value (typically 75, 100, or 120 years). The design life drives the sacrificial-thickness allowance and the materials grade.

Mistake 4: No QA acceptance criteria

Pattern: materials testing and workmanship checks listed without measurable acceptance values. Always include the specific values (95% MDD, ±2% OMC, ±5 mm plumb, etc.).

Mistake 5: Missing maintenance handover

Pattern: specification ends at practical completion. The wall enters service with no documentation, no maintenance schedule, no instrumentation handover. The asset owner is left to discover problems years later. Section 8 prevents this.

Mistake 6: Pre-qualification ignored

Pattern: Section 2 written but not enforced at tender evaluation. The lowest bid wins regardless of credentials. The cheapest contractor delivers the cheapest wall. Enforce pre-qualification rigorously.

Getting your project specification reviewed

For project teams writing or reviewing an MSE wall tender specification, AnchorSOL®'s engineering team offers complimentary specification review for projects in the planning phase. We comment on completeness, alignment with current Malaysian practice, and gaps that have caused problems on similar projects we've seen.

Contact us with your draft specification (or just the wall scope and your standard form) for review and comment. Send draft on WhatsApp →

Frequently asked questions

Can I just use the JKR standard specification as-is?

For JKR-tendered federal projects, the JKR Standard Specification is the controlling document and additional project-specific clauses supplement it. For private-sector projects, the JKR specification is a useful starting point but it's not project-specific and needs supplementation: design life, project-specific loadings, project-specific durability spec, and asset-owner monitoring requirements.

How long should an MSE wall specification be?

A complete project specification covering the eight sections above typically runs 25 to 50 pages, depending on project complexity. Generic boilerplate copy-paste specifications under 10 pages are usually insufficient. Long isn't necessarily better, but unmeasurable shortness is dangerous.

What about specifying anchored MSE specifically (vs friction-based)?

The materials clauses (Section 3) and design clauses (Section 4) can be written to require either friction-based MSE, anchored MSE, or to permit alternatives. If the project requires the anchored mechanism specifically (for cost reasons, backfill spec reasons, or schedule reasons), state "anchored MSE wall system" in Section 1 Scope. Otherwise, write the spec to accept compliant proposals from any MSE wall variant.

Can I get a downloadable spec template?

The clauses in this article are publicly available and free for use. For a Word-format project-specific template with all eight sections pre-populated and editable, request via WhatsApp → and we'll send the latest version.