Performance Overview
Weather Performance
This system has been designed as a front-sealed system. The system has been impact tested to BS EN 14019 and tested for weather tightness in accordance with the CWCT 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 |
| Wind Load (Safety) | 3600Pa | Pass |
These levels of performance should be sufficient for any location within the UK and Ireland. For further information on testing and performance contact Metal Technology’s Technical Department.
Where overall screen height exceeds 20 storeys or screen requirements differ from those stated in this literature refer to Metal Technology’s Technical Department.
Acoustic
The system has been successfully acoustically tested to BS EN ISO 10140-2.
Materials
Aluminium profiles are extruded from aluminium alloy 6060 T6 complying with the recommendations of BS EN 12020-2 / BS EN 755-Parts 1 to 9.
Construction
Mullions are square cut and jointed using specially designed jointing spigots. Transoms have notched ends to ensure an easily weather-proofed joint can be provided between mullion and transom. The system is mullion drained and provision is made to drain water out of the mullion at regular intervals.
The system offers the facility to produce screens facetted on plan. Gaskets provide the facility of facetting up to 10°.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS 3987 or BS EN ISO 7599.
- Powder organic coated to BS EN 12206-1.
Where required, a different colour / finish can be provided internally and externally.
Glazing
Glazed units up to 54mm can be achieved. High performance gaskets will ensure the long term weather-tightness of the system. Optional pre-formed vulcanised corner mouldings may be used internally.
Materials
Aluminium profiles are extruded from aluminium alloy 6060 T6 complying with the recommendations of BS EN 12020-2 / BS EN 755-Parts 1 to 9.
Construction
Mullions are square cut and jointed using specially designed jointing spigots. Transoms have notched ends to ensure an easily weather-proofed joint can be provided between mullion and transom. The system is mullion drained and provision is made to drain water out of the mullion at regular intervals.
The system offers the facility to produce screens facetted on plan. Gaskets provide the facility of facetting up to 10°.
Finishes
The range of sections can be provided in either of the following ranges of finishes:
- Anodised to BS 3987 or BS EN ISO 7599.
- Powder organic coated to BS EN 12206-1.
Where required, a different colour / finish can be provided internally and externally.
Glazing
Glazed units up to 54mm can be achieved. High performance gaskets will ensure the long term weather-tightness of the system. Optional pre-formed vulcanised corner mouldings may be used internally.
Thermal Performance
System 17-65 curtain walling, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations.
| System 17-65 | U-Frame Values System 17-65 (36mm) |
| Mullion | 2.96 w/m2k |
| Transom | 2.87 w/m2k |
The following U-values for System 17-65 are based on a 7m (w) x 8m(h) curtain walling screen.
| Achievable whole window U-value (36mm) | Centre pane U-value | |
| 1.0 W/m2K | 0.5 W/m2K | |
| System 17-65 | 1.36 W/m2K | 0.87 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.
