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EFP 65.2 – Four sided SSG, optional with feature cover caps

Introduction EFP 65  Unitised Curtain Wall system.

EFP SSG 65.2, Four Sided Structural Glazed UNITISED CURTAIN WALL System enables  the construction of attractive curtain walling, with the benefits of slim sightlines.

This thermally insulated system consist of many standard profiles and several custom made profiles are available up on request.


Specification summary:

EFP SSG 65-2 is a fully drained & pressure equalised, thermally broken curtain wall system which consists of 65 mm wide frames. (mullions and transoms)

The external vertical and horizontal sightline (Recessed joint) is 15 mm only

The joint seals are made of extruded silicone gaskets, compatible with most silicone sealants.

Various external features as cover caps are available for this system. Applied horizontally and/or vertically.

Specification summary continued :


  • GlazingThe system is factory glazed (structurally bonded) Glass should conform the requirements of BS 6262 for thickness and type, in terms of wind resistance, safety and security.
  • Main frames and transoms are available with or without anodized bonding profile!
  • DrainageThe system is fully drained & pressure equalised, achieved by meeting the requirements of “Ventilated and drained glazing system” as specified in BS 6262
  • Thermal insulation–Class 2.1 in accordance with DIN 4108 (2.0-2.8 W m2 K) or EN ISO 10077-1
  • The thermal transmittance ( Uf ) W/m2 K, is depending on the insulator strip, calculated as per EN ISO 10077-1. Comparable with class 2.1 DIN 4108-4 Table 3
  • Sound insulation–Depending largely upon the glass specification, generally the curtain wall framing reduces the figure by 2db (A)
  • Materials–The system is constructed from extruded aluminium profiles, using alloy 6063 complying the requirements of BS 1474.
  • Construction–Any instructions regarding the manufacture and installation of the system must be strictly adhered to.
  • Weathering–Glazing vision strips are made of extruded Silicone profiles conforming to BS 4255 Part 1.
  • Performance / exposure category The system will achieve the following criteria when manufactured, installed and glazed to EFP recommended procedures.
  • Classifications
    • Air permeability: ASTM E 283
    • Water tightness: ASTM E 331
    • Water tightness cyclic pressure: As/NZS 4284 (150-300 / 300-600 / 600-1200 Pa)
    • Wind resistance: ASTM E 330 – 2400 Pa design – 3300 Pa safety
    • 2400 Pa (Pascal’s) is dependant upon correct mullion and transom selection to suit span and spacing by project.
  • Size limitations–The size limitation of the system depends mainly on the mullion/transom members used to suit the span, spacing and wind/dead loads, which are specific for each individual project
Typical Frame Typical Stack Joint

Typical Transom


Some options within EFP 65 Unitised CW
4 Sided structural Glazing With Horizontal feature cap Concealed Window