VDI 2230 Blatt 2 2014-12 PDF

Full title and description

STB VDI 2230 Blatt 2 — Systematische Berechnung hochbeanspruchter Schraubenverbindungen: Mehrschraubenverbindungen. This guideline (Blatt 2, Ausgabe 2014‑12) specifies a systematic method to determine load distribution and the most highly stressed individual bolt in multi‑bolt assemblies and gives the formulas, factors and worked examples needed to assess strength and safety of multi‑bolt connections.

Abstract

VDI 2230 Blatt 2 (2014‑12) extends the VDI 2230 framework to multi‑bolted joints: it describes how to convert a multi‑bolt field into an equivalent single‑bolt problem (identify the most loaded bolt), defines load distribution factors, includes guidance on combined axial/ shear/bending/torsional loads, and addresses practical issues of assembly (e.g., tightening methods and preload losses). The guideline contains theory, calculation steps, correction factors and practical examples.

General information

• Status: Published guideline (VDI recommendation), in force as issued (Ausgabe 2014‑12).
• Publication date: December 2014 (2014‑12).
• Publisher: VDI — Verein Deutscher Ingenieure (published as VDI‑Richtlinie).
• ICS / categories: ICS 21.060.10 (mechanical fasteners / bolted joints).
• Edition / version: Blatt 2, Ausgabe 2014‑12 (part of the VDI 2230 series).
• Number of pages: Approximately 93 pages (publication/compiled document length as distributed in 2014 edition).

Scope

Defines a systematic procedure for calculating the stresses and safety of highly stressed multi‑bolt assemblies (Mehrschraubenverbindungen). The guideline shows how to determine which bolt is most highly loaded within a bolt field, how to compute load sharing and interaction effects (axial, shear, bending, torsion), and how to include assembly effects such as preload, settling (set‑up), and different tightening techniques. It is intended to be used together with VDI 2230 Blatt 1 (single‑bolt / cylindrical bolt calculations) so that the identified worst‑case bolt is then checked with the single‑bolt method.

Key topics and requirements

• Identification of the most highly stressed bolt in a bolt field and reduction of a multi‑bolt problem to an equivalent single‑bolt calculation.
• Formulation of load distribution factors for axial, bending, shear and torsion loading; treatment of eccentric and non‑uniform loading.
• Guidance on assembly/preload (including hydraulic, torque and turn‑of‑nut methods) and factors for preload application — new/updated treatment included in the 2014 release.
• Set‑up (settling) effects, preload loss estimation and recommendations for considering real contact conditions.
• Worked examples, calculation sequences and annexes with factors/tables to support practical design checks.

Typical use and users

Used by mechanical designers, calculation engineers, structural/connection designers and analysts in machinery, automotive, power generation, pressure‑containing equipment and plant engineering to size and verify multi‑bolt flange connections, coupling flanges, machine baseplates and other bolted assemblies where bolts are highly stressed. Also used by developers of CAE and bolt‑calculation software as a reference method.

Related standards

Directly related to VDI 2230 Blatt 1 (Zylindrische Einschraubenverbindungen / single‑bolt calculation, Ausgabe 2014‑12) — Blatt 2 relies on Blatt 1 for the detailed single‑bolt verification. Other commonly referenced documents include mechanical property standards for fasteners (e.g., ISO 898‑1 for mechanical properties of bolts) and regional/application standards for high‑strength bolted assemblies. Users should consider relevant EN/DIN or ISO standards for bolt grades, material data and fastener testing when applying VDI 2230 procedures.

Keywords

VDI 2230, bolt calculation, multi‑bolt joints, Mehrschraubenverbindungen, preload, tightening methods, load distribution, flange connection, set‑up, screw joint verification.

FAQ

Q: What is this standard?

A: VDI 2230 Blatt 2 is a VDI guideline (part of the VDI 2230 series) that provides a step‑by‑step method to calculate and assess highly stressed multi‑bolt assemblies (Mehrschraubenverbindungen). It was published as Blatt 2 in December 2014.

Q: What does it cover?

A: It covers the derivation and application of load distribution factors in bolt fields, methods to identify the most stressed bolt, interaction of axial/shear/bending/torsion loads, practical assembly aspects (preload application, hydraulic tightening, settling), and worked examples to guide real‑world calculations.

Q: Who typically uses it?

A: Mechanical designers, structural and connection engineers, calculation specialists, and software developers in industries that design and verify bolted joints — e.g., machinery, automotive, power, and plant engineering.

Q: Is it current or superseded?

A: The document referenced here is the 2014‑12 edition of VDI 2230 Blatt 2. As with any technical guideline, users should confirm whether a newer revision or amendment exists before final design work; at publication it was released as the definitive Blatt 2 and intended to be used in conjunction with VDI 2230 Blatt 1 (2014‑12).

Q: Is it part of a series?

A: Yes — VDI 2230 is a multi‑part rule set. Blatt 1 covers single (cylindrical) bolt connections and Blatt 2 extends the systematics to multi‑bolt (Mehrschrauben‑) connections; both parts are published in the 2014 cycle.

Q: What are the key keywords?

A: Multi‑bolt, bolt field, load distribution, preload, tightening method, set‑up (settling), flange connection, VDI 2230, bolt verification.