SIST EN 572-7:2012

Overview

EN 572-7:2012 - Glass in building - Basic soda lime silicate glass products - Part 7 covers wired or unwired channel shaped glass for use in buildings. Published by CEN, the standard specifies dimensional and minimum quality requirements (visual and wire faults) for channel shaped glass supplied in both stock sizes and final cut sizes. It is part of the EN 572 series and references EN 572-1 for definitions and general properties.

Key topics and technical requirements

• Scope: Applies to channel shaped glass (U‑channel) made from soda‑lime silicate glass, wired or unwired, for building use.
• Stock sizes:
  • Widths (B) commonly from 232 mm to 498 mm (nominal).
  • Flange heights (d) typically 41 mm or 60 mm.
  • Maximum available length up to 7 000 mm; stock lengths supplied in multiples of 250 mm.
• Dimensional measurement methods:
  • Width, flange height: vernier caliper (accuracy 0.1 mm).
  • Thickness: plate gauge (diameter 50 ± 5 mm), accuracy 0.1 mm.
  • Length measured at web centre; squareness and flange deviation measured relative to draw direction.
• Tolerances (selected):
  • Width B: ±2.0 mm (typical).
  • Flange height d: ±1.0 mm.
  • Thickness c: commonly 6 mm ±0.2 mm (for 41 mm flange) or 7 mm ±0.2 mm (for 60 mm flange).
  • Length H: ±3.0 mm.
  • Squareness of cut: ≤ 3 mm.
  • Flange deviation z: ≤ 1.0 mm.
• Wire inlay requirements (for wired glass):
  • Wire must cover at least 75% of web width.
  • Maximum spacing between adjacent wires: 35 mm; spacing tolerance ±6 mm.
  • Wire diameter: 0.3 mm to 0.7 mm.
  • Wire deviation y: ≤ 5 mm per metre; wire breaks or penetration of surface are not permitted.
• Quality/acceptance:
  • Visual faults (bubbles, ream, scratches, inclusions) visible under defined inspection conditions (diffuse daylight, 2 m viewing distance, white background) are not allowed.
  • Wire faults beyond allowed limits are not acceptable.

Applications and users

Who uses EN 572-7:2012:

• Glass manufacturers and fabricators for production and quality control.
• Architects, façade and structural engineers specifying channel shaped glass for building elements.
• Glazing contractors, procurement teams and testing laboratories for acceptance testing and conformity checks.

Typical applications:

• Channel/U‑profile glazing used in building envelopes, canopies, partitions and decorative or structural glass features where U‑shaped sections are required.

Related standards

• EN 572-1:2012 - Definitions and general physical/mechanical properties (normative reference).
• EN 572 series (Parts 1–9) and EN 572-9 for conformity/product evaluation.

Keywords: EN 572-7:2012, channel shaped glass, wired glass, soda lime silicate glass, dimensional requirements, tolerances, quality requirements, visual faults, wire faults, CEN.