System 17 has been extended to provide the designer with a mono or dual pitch roof light system offering a complementary appearance to that of the vertical façade. All Metal Technology’s window and door systems are complementary to System 17 offering the designer complete versatility.
Performance Overview
Weather Performance
The Curtain Walling has been tested for weather tightness in accordance with the CWCT sequence B, including the dynamic test for curtain walling and achieved the following results:
| Air Permeability | 600Pa | Pass |
| Watertightness | 600Pa | Pass |
| Wind Resistance | 2400Pa | Pass |
| Dynamic Water Penetration (Aero Engine) | 600Pa | Pass |
| Dynamic Water Penetration European Standard (Fan) BS EN 13050 | 900Pa | Pass |
| Hose pipe test | 22l/min @ 220Pa | Pass |
Air Permeability
0.045m3/h m2 @ 50Pa
Impact Resistance
BS EN 12600 50Kg
Security
This system has passed BS 7950 incorporating Amendments 1, 2 and 3 "Specification for Enhanced Security Performance" as generally accepted on Secure by Design products.
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 9.
Construction
The system is fabricated in “stick” form, is pressure equalised, and self-draining by means of overlapping the transoms onto the mullion members. Water is then channelled to the exterior of the building via the integral drainage chambers within the mullions. Where the transoms connect to the mullions, the joint is sealed by means of a purpose designed transom end seal. The transom members are square cut and fixed securely to the mullions by means of spring cleats design to fit into integral ports within the cavity of the transom wall.
The system is dry glazed using proprietary, high performance captive gaskets internally. All internal gaskets are bonded and sealed during construction, using Metal Technology’s own waterproof adhesive to ensure that a watertight joint at all cruciform connections is maintained at all times.The system is thermally broken throughout by means of a continuous thermal isolator located between a choice of aluminium or thermally enhanced pressure plates and all structural members. The thermally enhanced pressure plate is held in place by aluminium stitch plates. The pressure plate is retained by using stainless steel self-tapping screws. Metal Technology recommends that only A2 or A4 austenitic stainless steel fixing screws are used in the assembly of their products.
Carefully designed fixing brackets have been developed for System 17 to allow a secure and simple fix so that all loads can be transferred back to the building’s main structural form with ease.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS1615 or BS3987 or BS EN 12373-1
- Powder organic coated to BS6496 or BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards. The System 17 curtain walling can accommodate a different colour/finish internally to that used externally.
Glazing
The system is externally glazed and can accommodate glazing units from 4mm to 54mm units.
Materials
Aluminium profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 9.
Construction
The system is fabricated in “stick” form, is pressure equalised, and self-draining by means of overlapping the transoms onto the mullion members. Water is then channelled to the exterior of the building via the integral drainage chambers within the mullions. Where the transoms connect to the mullions, the joint is sealed by means of a purpose designed transom end seal. The transom members are square cut and fixed securely to the mullions by means of spring cleats design to fit into integral ports within the cavity of the transom wall.
The system is dry glazed using proprietary, high performance captive gaskets internally. All internal gaskets are bonded and sealed during construction, using Metal Technology’s own waterproof adhesive to ensure that a watertight joint at all cruciform connections is maintained at all times.The system is thermally broken throughout by means of a continuous thermal isolator located between a choice of aluminium or thermally enhanced pressure plates and all structural members. The thermally enhanced pressure plate is held in place by aluminium stitch plates. The pressure plate is retained by using stainless steel self-tapping screws. Metal Technology recommends that only A2 or A4 austenitic stainless steel fixing screws are used in the assembly of their products.
Carefully designed fixing brackets have been developed for System 17 to allow a secure and simple fix so that all loads can be transferred back to the building’s main structural form with ease.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS1615 or BS3987 or BS EN 12373-1
- Powder organic coated to BS6496 or BS EN 12206-1
Metal Technology's powder coating is produced to Qualicoat standards. The System 17 curtain walling can accommodate a different colour/finish internally to that used externally.
Glazing
The system is externally glazed and can accommodate glazing units from 4mm to 54mm units.
Thermal Performance
Metal Technology’s Curtain Walling Range, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations. The thermal isolator profile has been specifically designed to minimise heat transfer across the mullion and transom profiles.
| System 17 High Rise | U-Frame Values System 17 High Rise (38mm) |
| Mullion | 2.01 w/m2k |
| Transom | 2.18 w/m2k |
The following U-values for System 17 HR are based on a 7m (w) x 8m(h) curtain walling screen.
| Achievable whole window U-value (38mm) | Centre pane U-value | |
| 1.0 W/m2K | 0.5 W/m2K | |
| System 17 | 1.25 W/m2K | 0.78 W/m2K |
Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average window U-values for their full range of systems.
