Guide / National Annex

National Annex Load Inputs for Glass Design

Glass load checks often need more than a glass design standard. Load combinations and imposed loads may refer to Eurocode and project-specific National Annex sources.

National Annex European standards EN 1990

National design basis From national choices to project inputs NDP

01 · European basis EN 1990 / EN 1991 Common design framework

02 · National Annex National choices NDPs and country-specific data

03 · Project basis Applicable inputs Location, use and specification

04 · VitraLab review Load Output Actions and combination parameters

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Overview

Primary topic: National Annex
Engineering basis: European standards
Review status: Project-specific verification required

Standards Referenced

Relevant references include EN 1990:2002, EN 1991-1-1:2002, and applicable project or local National Annex values.

Why It Matters

National Annex values can affect imposed loads, barrier loads, and the assumptions used in project-specific calculations.

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Input Basis

Using VitraLab

VitraLab currently provides Irish National Annex barrier categories as default values, while allowing custom project values where another local National Annex or project brief applies.

Global Use

Users outside Ireland should review local National Annex requirements and enter custom values where the project basis is different.

Engineering content is prepared and maintained by VitraLab Engineering. Worked examples show how the current calculator treats a defined case; they do not replace project-specific verification.