As a safety precaution the Sky Tower's lifts have special technology installed to detect movement (such as swaying due to high wind) and will automatically slow down. The tower is designed to withstand wind in excess of 200 km/h (120 mph) and designed to sway up to 1 metre (39 in) in excessively high winds. To then remove the crane, another crane had to be constructed attached to the upper part of the Sky Tower structure, which dismantled the big crane, and was in turn dismantled into pieces small enough to fit into the elevator. It had to be lifted into place using a crane attached to the structure, as it would have been too heavy for a helicopter to lift. The mast weighs over 170 tonnes (190 short tons).
During construction 15,000 cubic metres (20,000 cu yd) of concrete, 2,000 tonnes (2,200 short tons) of reinforcing steel, and 660 tonnes (730 short tons) of structural steel were used. A structural steel framework supports the upper mast structure. The upper levels were constructed from composite materials, structural steel, precast concrete and reinforced concrete, and the observation decks clad in aluminium with blue/green reflective glass. The main shaft was built using climbing formwork. Its 12-metre (39 ft) diameter shaft (containing four lifts and an emergency stairwell) is supported on eight "legs" based on 16 foundation piles drilled over 12 m (39 ft) deep into the local sandstone. The tower is constructed of high-performance reinforced concrete. Glass flooring seen inside one of the observation decks Climbs into the antenna mast portion (300 m or 980 ft heights) are also possible for tour groups, as is a walk around the exterior. The jump is guide-cable-controlled to prevent jumpers from colliding with the tower in case of wind gusts. The tower also features the "SkyJump", a 192-metre (630 ft) jump from the observation deck, during which a jumper can reach up to 85 km/h (53 mph). The top observation deck labeled "Skydeck" sits just below the main antenna at 220 m (720 ft) and gives views of up to 82 km (51 mi) in the distance. The main observation level at 186 m (610 ft) has 38 mm (1.5 in) thick glass sections of flooring giving a view straight to the ground.
It has three observation decks at different heights, each providing 360-degree views of the city. There is also a brasserie-style buffet located one floor above the main observatory level. The upper portion of the tower contains two restaurants and a cafe-including New Zealand's only revolving restaurant, located 190 m (620 ft) from the ground, which turns 360 degrees every hour.
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