Sentences with phrase «expensive supporting structures»
The reason is that their construction requires large, expensive supporting structures.
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The 5 - metre wide Hale Reflector, built in 1948, and Russia's 6 - metre BTA - 6, finished in 1965, were the last of their kind — the supporting structures needed to keep the mirrors rigid were too expensive to build and too massive to turn smoothly to follow the motion of the stars.
The 5 - meter wide Hale Reflector, built in 1948, and Russia's 6 - metre BTA - 6, finished in 1965, were the last of their kind — the supporting structures needed to keep the mirrors rigid were too expensive to build and too massive to turn smoothly to follow the motion of the stars.
It is clear for engineers that the physical vulnerability technical analyses (diagnose), the rehabilitation and reinforcement of structures or the relocation of buildings (implementation), due to the number of cases in most countries, are a huge and expensive enterprise that requires high level of technical knowledge, political feasibility / will and the prioritization of governmental financial support.