Division 31: Earthwork for Specifiers

For a broad, role-neutral explanation of the scope and its coordination boundaries, start with [CSI MasterFormat Division 31: Earthwork](/MasterFormat-division-31-earthwork). This page focuses on how specifiers apply that division in practice.

How Specifiers Use Division 31 – Earthwork

Core numbering system for project manuals, outline specs, and section schedules—every deliverable references MasterFormat divisions and titles. Division 31 is one of the divisions that specifiers encounter most frequently in practice. The sections within Division 31 define the products, execution methods, and quality standards that specifiers must reference, review, or author.

Key sections within Division 31 include: - 31 10 00 – Site Clearing - 31 20 00 – Earth Moving - 31 23 00 – Excavation and Fill - 31 25 00 – Erosion and Sedimentation Controls - 31 30 00 – Earthwork Methods

These sections shape how specifiers write project manuals or outline specs using MasterFormat numbers and titles. When section numbers are outdated or inconsistent, the downstream impact on specifiers is immediate: inconsistent spec numbering.

Division 31 in the Specifiers Workflow

Specification writers and in-house specifiers at AECO firms who author, maintain, or use specifications, templates, models, or schedules that include CSI numbers, titles, or classifications. Within this scope, Division 31 plays a specific role:

1. Documentation — Specifiers write project manuals or outline specs using MasterFormat numbers and titles. Division 31 sections must be correctly numbered and titled in every document that references them.
2. Coordination — Division 31 scope intersects with other divisions on every project. Specifiers need consistent classification to coordinate earthwork work with adjacent trades and disciplines.
3. Quality — maintain and issue office master sections/templates that embed MasterFormat numbers and titles on client work.

Pain Points Specifiers Face with Division 31

• Inconsistent spec numbering — When Division 31 section references are affected by inconsistent spec numbering, the result is rework, RFIs, or coordination failures that specifiers must resolve.
• Edition confusion across project phases — When Division 31 section references are affected by edition confusion across project phases, the result is rework, RFIs, or coordination failures that specifiers must resolve.

These issues compound across projects. A single incorrect Division 31 section number in a team's template can propagate across every project that uses that template.

Division 31 Cross-References for Specifiers

UniFormat: Division 31 maps to UniFormat G (Sitework)—the site preparation work that precedes building construction.

OmniClass: OmniClass Table 22 (Work Results) includes earthwork results; Table 13 (Spaces by Function) covers site spaces.

Understanding these connections helps specifiers maintain consistency when Division 31 work touches UniFormat elements or OmniClass classifications in their deliverables.

Why Specifiers Need Current Division 31 Data

CSI Dynamic Standards includes Division 31 as part of a connected, edition-aware system—licensed through The Construction Standard. For specifiers, this means always-current section numbers and titles for Division 31, governed cross-references to UniFormat and OmniClass, and edition tracking that prevents referencing obsolete classifications in specifiers deliverables.