Sir Leo Hielscher Bridges - Design


On completion of construction, the (260 m/853 ft) main span of the Gateway Bridge was a world record for a prestressed concrete free cantilever bridge. It held this record for over 15 years. The box girder is still the largest prestressed concrete, single box in the world, measuring 15 m (49 ft) deep at the pier, with a box width of 12 m (39 ft) and an overall deck width of the 6 lanes of 22 m (72 ft).

The bridge owes its distinctive shape to air traffic requirements restricting its height to under 80 metres (260 ft) above sea level (all features of the bridge including light poles) coupled with shipping needs requiring a navigational clearance of 55 metres (180 ft).

The bridge has six lanes (three in each direction). The bridge was financed by funds borrowed by the Queensland Government, and as a result, users of the bridge pay a toll on the southern side of the Brisbane River. The Bridge is operated and maintained by Queensland Motorways, which is a Queensland Government-owned enterprise.

The total length is 1,627 metres (5,337 ft). This is divided into a southern approach of 376 metres (1,234 ft), a northern approach of 731 metres (2,398 ft) and the three central spans of 520 metres (1,706 ft). The main span is 260 metres (853 ft) long by 64.5 metres (212 ft) high, which is equivalent to a 20-storey building. A total of 150,000 tonnes (165,000 short tons) of concrete was used to construct the bridge.

The original design did not include a safety fence to prevent suicide attempts and base jumping. Three-metre high safety fences attached to the top of the concrete traffic barrier were later installed to prevent these incidents occurring. Anti-climbing screens are part of the second bridge's security features.

Read more about this topic:  Sir Leo Hielscher Bridges

Other articles related to "design, designs":

Shea Stadium - Features - Design
... The design also allowed for Shea Stadium to be expandable to 90,000 seats (by completely enclosing the grandstand), or to be later enclosed by a dome if warranted ...
Very-large-scale Integration - Structured Design
... Structured VLSI design is a modular methodology originated by Carver Mead and Lynn Conway for saving microchip area by minimizing the interconnect ... In complex designs this structuring may be achieved by hierarchical nesting ... Structured VLSI design had been popular in the early 1980s, but lost its popularity later because of the advent of placement and routing tools wasting a lot of area by routing, which is tolerated because of the ...
Terminology - Process Design
... "Process design" (in contrast to "design process" mentioned above) refers to the planning of routine steps of a process aside from the expected result ... Processes (in general) are treated as a product of design, not the method of design ... and executives have found the term useful to describe the design of business processes as well as manufacturing processes ...
Boeing 747 - Design
... For more design details, see Boeing 747-400, 747-8, and 747SP ... The Boeing 747 is a large, wide-body (two-aisle) airliner with four wing-mounted engines ...
56th Tony Awards - The Ceremony
... of a Play, Direction of a Musical, Book of a Musical, Original Score, Choreography, Costume Design, Lighting Design and Scenic Design ...

Famous quotes containing the word design:

    A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
    Freeman Dyson (b. 1923)

    The reason American cars don’t sell anymore is that they have forgotten how to design the American Dream. What does it matter if you buy a car today or six months from now, because cars are not beautiful. That’s why the American auto industry is in trouble: no design, no desire.
    Karl Lagerfeld (b. 1938)

    I begin with a design for a hearse.
    For Christ’s sake not black—
    nor white either—and not polished!
    Let it be weathered—like a farm wagon—
    William Carlos Williams (1883–1963)