The primary loads acting on DAWN are wind and snow loads. As a partially porous surface, the fiber optic fabric presents only a partial surface to wind and snow applied loads. The effects of wind induced oscillation is resisted using the mass and stiffness of the superstructure. The deflection of the superstructure will not be greater than +/-1.0m. This preliminary analysis has been based upon a 30 year return wind and snow loading.
DAWN will require only conventional erection techniques. The fabric will be delivered to site in a series of panels dimensionally coordinated to steel cables of the superstructure. When fully assembled the cantilever will appear as a single plane of fabric.
Electric supplying the lighting can be taken from the existing supply present in the area. No special transformers are required for DAWN.
DAWN is protected from lightning by copper tape running down the interior of each structural member anchored to the reinforcement of the concrete foundations.
The fiber optic fabric is an open weave and rainwater therefore flows through it rather than running down its surface. There will be little accumulated run off as a result of DAWN. The existing drainage provisions in the area are therefore judged to be sufficient.
DAWN can be washed with a water jet. Six monthly replacement of the bulbs in the lightsources and will guarantee continual illumination of DAWN. This maintenance period has been based on previous applications of the technology in very busy polluted urban locations. The light source is a LT100-MH-CW Metal Halide lamp enclosed in an IP65 housing