It was the world's tallest light weight concrete building at the time it was built.
2.
At the time, the Australia Square tower was the world's tallest light weight concrete building.
3.
The entire roof used 2, 880 cubic yards of light weight concrete that weighed only 105 pounds per cubic feet ."
4.
The 1940s 75 lb flatbottom rail placed on light weight concrete sleepers would be taken out and replaced with 1st generation steel sleepers bedded in ash ballast.
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