GOST 2.305-2008 PDF

Full title and description

GOST 2.305-2008 — "Drawings. Lines. Types, thicknesses and application" (original Russian title: "ЕСКД. Линии. Виды, основные толщины и применение"). This national standard specifies the types of lines, their principal thicknesses and rules for application on technical drawings within the system of design documentation for construction and engineering.

Abstract

This standard defines conventional line types, recommended basic line thicknesses for different drawing scales, and rules for how and where to apply these lines on technical and engineering drawings. It is intended to ensure consistency and clear graphical representation across technical documentation, facilitating unambiguous interpretation of drawings by designers, manufacturers, inspectors and maintainers.

General information

• Status: National standard (GOST) in force; adopted as part of the Unified System for Design Documentation (ESKD)
• Publication date: 2008
• Publisher: National standards body (GOST / Rosstandart)
• ICS / categories: 01.110.20 (Technical drawing) / Technical product documentation
• Edition / version: 2008 edition (GOST 2.305-2008)
• Number of pages: Typically a short standard — commonly around 3–6 pages (varies by publication format)

Scope

GOST 2.305-2008 applies to the graphical representation on technical drawings and design documentation produced under the ESKD. It sets out the prescribed line types (continuous, dashed, chain, etc.), their intended meaning (visible edges, hidden edges, center lines, cutting planes, break lines, etc.), and recommended basic thicknesses depending on drawing scale and purpose. The standard is intended for use in mechanical, civil, electrical and other engineering drawings where standardized line conventions are required.

Key topics and requirements

• Definition and graphical form of primary line types used in technical drawings (visible, hidden, center, section, dimension, leader, cutting plane, break, phantom, etc.).
• Recommended basic line thicknesses (main or basic thicknesses) for different drawing scales and drawing elements to ensure legibility and consistent appearance.
• Rules for selecting line thicknesses relative to the basic thickness (e.g., thicker for main outlines, thinner for dimension lines and hatching).
• Specifications for the application of line types to denote different features: visible outlines, hidden details, axes, centerlines, sectioning planes and boundaries of parts.
• Guidance on combining line types and on transitions between lines of different thicknesses to maintain clarity.

Typical use and users

Engineers, draftsmen, CAD operators, technical illustrators, document controllers and quality inspectors in manufacturing, construction, mechanical engineering, and other technical fields use this standard to produce consistent, unambiguous technical drawings. It is also used in technical education and training where ESKD conventions are taught.

Related standards

GOST 2.305-2008 is part of the GOST/ESKD suite of standards for technical drawing. Related documents include standards that cover general requirements for design documentation, lettering, dimensions and tolerances, projections, scales, and conventions for sections and cuts (for example, other GOST 2.x series standards on drafting rules, lettering, scales and graphical symbols).

Keywords

GOST 2.305-2008, ESKD, technical drawing, line types, line thickness, drawing conventions, drafting standard, visible lines, hidden lines, centerlines, section lines

FAQ

Q: What is this standard?

A: GOST 2.305-2008 is a Russian national standard that defines types of lines, recommended basic thicknesses and rules for their application on technical drawings under the ESKD (Unified System for Design Documentation).

Q: What does it cover?

A: It covers graphical line types (continuous, dashed, chain, etc.), their meanings, recommended thicknesses for different scales and elements, and rules for applying these lines to represent visible edges, hidden features, centers, sections, dimensioning and other drawing elements.

Q: Who typically uses it?

A: Mechanical and civil engineers, draftsmen, CAD operators, technical illustrators, document controllers and quality inspectors who prepare or interpret technical drawings according to ESKD conventions.

Q: Is it current or superseded?

A: The standard was issued in 2008 and is widely referenced as the applicable edition. Users should check with the relevant national standards authority or their organization to confirm whether a newer revision or replacement exists for their specific application.

Q: Is it part of a series?

A: Yes. GOST 2.305-2008 is part of the GOST 2.x series of standards that comprise the Unified System for Design Documentation (ESKD), which includes standards on drawing formats, line conventions, dimensions, lettering, scales, projection methods and related drafting rules.

Q: What are the key keywords?

A: Line types, line thickness, technical drawing, ESKD, GOST 2.305-2008, drafting conventions, visible line, hidden line, centerline, section line