9.1 CSI MasterFormat Divisions & SectionFormat Structure

Core Focus: Construction specifications establish the legal, qualitative, and administrative baseline for landscape construction. Mastery of the CSI MasterFormat 50-division system, CSI SectionFormat 3-part structure, specification writing methodologies, and the legal relationship between drawings and specifications is essential for passing the LARE Section 3 (Construction Documentation and Administration) examination.

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1. The CSI MasterFormat 50-Division System

The Construction Specifications Institute (CSI) and Construction Specifications Canada (CSC) publish MasterFormat, the universal standard for organizing construction specifications, project manuals, and cost data across North America. Prior to 2004, MasterFormat utilized a legacy 16-division system where all site work was compressed into a single division (Division 2: Site Work). The modernized 50-Division system organizes construction into five broad groups across 50 divisions (00 through 49), providing dedicated divisions for site work, civil infrastructure, and environmental systems.

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|                   CSI MASTERFORMAT ORGANIZATIONAL GROUPS                |
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| 1. Procurement and Contracting Requirements Group (Division 00)         |
| 2. Specifications Group:                                                |
|    - General Requirements Subgroup (Division 01)                        |
|    - Facility Construction Subgroup (Divisions 02 - 19)                 |
|    - Facility Services Subgroup (Divisions 20 - 29)                     |
|    - Site and Infrastructure Subgroup (Divisions 31 - 35)               |
|    - Process Equipment Subgroup (Divisions 40 - 49)                     |
+-------------------------------------------------------------------------+

Key Divisions in Landscape Architecture Practice

Landscape architects must demonstrate fluency with the specific divisions governing site documentation, procurement, and execution:

• Division 00 — Procurement and Contracting Requirements: Contains the bidding requirements, bid solicitation, instructions to bidders, bid forms, contract agreement forms, bond forms, and General and Supplementary Conditions of the Contract. Note: Division 00 covers procurement and contracting procedures, not technical building specifications.
• Division 01 — General Requirements: Establishes overarching administrative, procedural, and temporary requirements that apply universally across every technical section in Divisions 02 through 49. Topics include submittal procedures, quality control testing, temporary tree protection fencing, project meetings, substitution protocols, and closeout requirements.
• Division 31 — Earthwork: Covers all subsurface operations, site preparation, and earth moving. Key sections include:
  • 31 10 00 Site Clearing (clearing, grubbing, topsoil stripping)
  • 31 20 00 Earth Moving (rough grading, excavation, embankment fill)
  • 31 23 00 Excavation and Fill (trenching, backfill, compaction)
  • 31 25 00 Erosion and Sedimentation Controls (silt fence, sediment basins, SWPPP compliance)
  • 31 35 00 Slope Protection (riprap, slope revetments, gabions)
• Division 32 — Exterior Improvements: The primary technical division authored by landscape architects, encompassing all above-ground surface finishes, hardscapes, site amenities, and biological systems:
  • 32 01 00 Operation and Maintenance of Exterior Improvements
  • 32 10 00 Bases, Ballasts, and Paving
    • 32 12 16 Asphalt Paving
    • 32 13 13 Concrete Paving
    • 32 14 00 Unit Paving (concrete pavers, clay brick, stone setts, permeable unit pavers)
    • 32 15 00 Aggregate Paving (crushed stone, decomposed granite)
  • 32 30 00 Site Improvements
    • 32 31 00 Fences and Gates (ornamental steel, chain link, timber)
    • 32 32 00 Retaining Walls (segmental retaining walls [SRW], boulder walls, gabion walls)
    • 32 39 00 Manufacture Site Specialties / Site Furnishings (benches, litter receptacles, bicycle racks, tree grates, bollards)
  • 32 80 00 Irrigation
    • 32 84 00 Planting Irrigation (spray heads, drip irrigation, smart controllers, backflow preventers)
  • 32 90 00 Planting
    • 32 91 00 Planting Preparation (soil testing, soil amendments, engineered planting soils)
    • 32 92 00 Turf and Grasses (seeding, hydroseeding, sodding, native meadow establishment)
    • 32 93 00 Exterior Plants (trees, shrubs, groundcovers, perennial plugs, wetland emergent plants)
    • 32 96 00 Transplanting (relocation and preservation of existing specimen trees)
• Division 33 — Utilities: Covers civil site infrastructure outside the five-foot building line:
  • 33 40 00 Storm Drainage Utilities (area drains, catch basins, culverts, storm piping, underground detention)
  • 33 10 00 Water Utilities (site domestic water distribution, fire service mains)
  • 33 30 00 Sanitary Sewerage Utilities

MasterFormat 6-Digit Section Numbering Logic

MasterFormat employs a standardized 6-digit classification system organized into three pairs of two digits, representing increasing levels of specificity:

$\mathbf{32} \;\text{[Level 1: Division]} \quad \longrightarrow \quad \mathbf{93} \;\text{[Level 2: Broad Scope]} \quad \longrightarrow \quad \mathbf{13} \;\text{[Level 3: Medium Scope]}$

For example, in section number 32 93 13 Exterior Trees:

• 32 represents Division 32 (Exterior Improvements)
• 93 represents the Broad Scope category (Exterior Plants)
• 13 represents the Medium Scope topic (Exterior Trees)

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2. CSI SectionFormat: The Standardized 3-Part Specification Section

Every individual specification section within the project manual follows CSI SectionFormat, which mandates a three-part structure. This standardization ensures that contractors, estimators, and specifiers locate critical information consistently across all trades.

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|                    CSI SECTIONFORMAT: 3-PART STRUCTURE                 |
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| PART 1: GENERAL                                                         |
| Administrative, procedural, and quality requirements unique to section  |
+-------------------------------------------------------------------------+
| PART 2: PRODUCTS                                                        |
| Materials, manufactured items, mixes, fabrications, and approved brands |
+-------------------------------------------------------------------------+
| PART 3: EXECUTION                                                       |
| Substrate inspection, surface preparation, installation, and field QC   |
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Part 1 — General

Part 1 defines the administrative, legal, and operational parameters governing the work in that specific section:

• Section Includes / Summary: Brief summary of the specific work covered.
• Related Requirements: References to other related sections (e.g., cross-referencing Section 31 20 00 Earth Moving from Section 32 91 00 Planting Preparation).
• References: Consensus industry standards incorporated by reference (e.g., ASTM, ANSI, AASHTO, AmericanHort).
• Submittals: Detailed submittal requirements divided into:
  • Action Submittals: Require formal review and responsive action from the landscape architect before fabrication or procurement (shop drawings, manufacturer product cut sheets, physical material samples).
  • Informational Submittals: Verifications submitted for the record that do not require design approval (material test reports, certificates of compliance, installer qualification statements, nursery source declarations).
  • Closeout Submittals: Project record documents (as-builts), operation and maintenance (O&M) manuals, warranty documents.
• Quality Assurance: Minimum qualifications for installers (e.g., "Installer shall possess a minimum of 5 consecutive years of documented experience installing commercial segmental retaining walls and hold certification from the Concrete Masonry & Hardscapes Association [CMHA]"), mockups, pre-installation conferences, and regulatory approvals.
• Delivery, Storage, and Handling: Protection of materials prior to installation (e.g., protecting bare-root nursery stock from desiccation, storing bagged turf seed in a dry, ventilated enclosure).
• Field / Site Conditions: Environmental limitations (e.g., "Do not place asphalt paving when ambient air temperature is below 50°F (10°C) or when base course is wet or frozen").
• Warranty: Guarantee provisions extending beyond the standard one-year contract correction period (e.g., specifying a mandatory 1-year full-replacement plant establishment warranty for all trees and shrubs).

Part 2 — Products

Part 2 describes the physical materials, equipment, manufactured items, and assemblies to be incorporated into the work:

• Manufacturers / Acceptable Products: Lists acceptable manufacturers and model names (in proprietary specifications) or performance parameters.
• Materials: Physical, chemical, and biological properties (e.g., concrete paver compressive strength [minimum 8,000 psi per ASTM C936], aggregate base course gradation per AASHTO M147, organic compost pH range 6.0 to 7.5 and organic matter content > 50%).
• Mixes: Engineered formulations proportioned before or during installation (e.g., structural soil mixes [80% crushed angular stone, 20% clay loam by weight, with hydrogel bonding agent], concrete mix designs).
• Fabrication & Finishes: Factory fabrication tolerances, weld treatments, powder-coat paint standards, and galvanizing thicknesses (e.g., hot-dip galvanizing per ASTM A123).
• Source Quality Control: Quality verifications performed at the source before delivery to the job site (e.g., landscape architect plant tagging at the production nursery, quarry aggregate testing).

Part 3 — Execution

Part 3 establishes on-site installation standards, workmanship tolerances, and field operations:

• Examination: Inspection and acceptance of subgrade or substrate conditions before work begins (e.g., "Examine compacted aggregate base course; verify grades and elevations meet specified tolerances prior to installing bedding sand. Do not proceed until unsatisfactory conditions have been corrected").
• Preparation: Necessary preliminary work (e.g., scarifying subsoil to a depth of 6 inches, moistening planting beds, cleaning slab joints).
• Installation / Application / Erection: Detailed, chronological procedures for assembling or installing the work (e.g., paver laying patterns, joint sand sweeping and plate compaction, tree planting pit excavation to 2–3 times root ball width, setting root flare 1–2 inches above finished grade).
• Site Tolerances: Permissible physical variances from drawing dimensions (e.g., "Finished concrete pavement surface shall not vary more than 1/4 inch under a 10-foot straightedge").
• Field Quality Control: On-site inspection and testing protocols (e.g., field density testing of compacted fill per ASTM D1557 / D698, concrete slump and compressive strength cylinder breaks).
• Cleaning and Waste Management: Removal of surplus soil, excess materials, and job site debris.
• Demonstration and Training: Operational training provided to the owner's maintenance personnel (e.g., 4 hours of on-site instruction on programming the central irrigation satellite controller).
• Protection: Measures to protect installed work from damage by subsequent trades or weather prior to Substantial Completion.

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