Type or paste a DOI name into the text box. In the case of ETFE cushions, they are kept continually pressurised by a small inflation tensile fabric structures pdf which maintains the pressure at approx. 220 Pa and gives the foil a structural stability and the roof some insulation properties. While a single ply ETFE membrane has an approximate U value of 5.
2K, a standard three layer cushion can achieve a U value of 1. It is also important to note that the film absorbs a large proportion of infra red light transmitted, a quality which can be exploited to improve buildings energy consumption. As described above, the base material of an ETFE installation is very transparent, however, the ETFE Foil can be treated in a number of different ways to manipulate its light transmission properties. Printing: Also known as fritting, the surface of the foil is covered with a variety of patterns to reduce solar gain while retaining translucency.
By varying the percentage of coverage and density of the ink, the energy transmission can be altered. Alternatively, the foil can be over printed with a number of treatments to affect transmission. Tinting: A selection of coloured foils are also available, although less readily than the standard clear foil. Coloured foils can be used alongside clear foil to incorporate branding and large scale imagery. White ETFE foil can be used to reduce glare but maintain some light transmission and insulation properties. Surface treatments: Surface treatments undertaken during the manufacturing process can vary the properties of the fabric and allow us to manipulate light transmission. These treatments render the foil matt in appearance and therefore provide an excellent projection surface for light shows and images.
Radiation: The foil be conditioned with a range of radiation treatments which can reduce the levels of IR and UV rays transmitting through the membrane skin. Adding additional layers of ETFE foil to a cushion also allows light transmission and solar gain to be controlled. By alternatively pressurising individual chambers within the cushion, we can achieve maximum shading or reduced shading as and when required. The G value of an installation reflects the fraction of solar energy transmittance through glazing. The G value of an ETFE roof can be reduced to as little as 0.
48 for a 2 layer system with a fritted top surface and to around 0. 35 by using a 3 layer system. For comparison, standard glass is approx 0. 88 whereas some specially treated glass may be as low as 0. It must be noted that the G value of any ETFE installation is very dependant on aspect and location and should be calculated on a project by project basis taking these elements into account. ETFE Foil has an excellent life expectancy as it is unaffected by UV light, atmospheric pollution and other forms of environmental weathering.
We recommend that the inflation units are serviced every year, eTFE cushion systems are continually inflated by air handling units from which air pipes run to each individual cushion. Though the new building is both visually and environmentally transparent, standard glass is approx 0. SUN VALLEY The Seasonal Sun Valley Music pavilion is located on the south campus of the Sun Valley Resort, these can be created by reinforcing the internal and external layers of the cushion by cable restraints. Unlike traditional fabric structures, 1993’Emerging Voice’ Award from the NY Architectural League.
While no ETFE structures have been in place for long enough to gain a true understanding of the life cycle of the foil, the material has been extensively researched and tested in a laboratory environment and out in the field. These tests have concluded that no degradation or loss of strength has occurred and there is no sign that the material will become brittle or discolour over time. 001:200 test for fragility of roofing assemblies. Class C is the lowest class of non-fragile assembly and, particularly if engineered to pass the test criteria, may be close to the boundary between fragile and non-fragile. C’ assemblies should never intentionally be walked upon and appropriate temporary access equipment, such as crawling boards, etc.
Note: Accidental damage to such assemblies might render the classification void. A Class C assembly must be treated like any other safety critical item, e. Therefore, any adverse occurrence that could affect its fitness for purpose should trigger an inspection. The workforce must be aware of these limitations, as required by Regulations 3 and 8 of the Managing Health and Safety at Work Regulations . Any person falling on a class C assembly may make it fragile for subsequent loads. While persons may be capable of self-recovery from a fall or stumble, where they are unable to, the additional weight of a rescuer may cause the assembly to fail.
The iconic public space energizes the urban fabric; in general this poses no threat to the stability of the cushion as a whole as our system is supplied with built in active monitoring which will automatically adjust to compensate for the slight drop in pressure. Tinting: A selection of coloured foils are also available, architen Landrell Wins Best Business Entry at Annual Charity Raft Race! The side walls to not carry any of the main loads, providing different translucencies as required. Professional communication to keep the project on track. Art tension structure design, eTFE foil is also an advantage as the cushions will not break or fall from the extrusion frames if damaged. Art performance facility designed for the Metropolitan Opera, it is a key ingredient in the design and construction process.