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A cylindrical concrete tank, 30 m external diameter, is to be prestressed circumferentially by means of high-strength steel wire (E, = 2 x 105 N/mm2) jacked at 4 points, 900 apart. If the minimum stress in the wire immediately after tensioning is to be 450 N/mm2 and coefficient of friction is 0.5, calculate :
(a) The maximum stress to be applied to the wires at the jack, and
(b) The expected extension at the jack.
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These days in Portugal is really difficult to get a job. So my question, is there any company that have online jobs in designing and calculating structures?
A sand at a borrow pit is determined to have an in-situ dry unit weight of 18.4 kN/m 3 . Laboratory tests indicate the maximum and minimum unit weight values of 19.6 kN/m 3 and
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Facilities that discharge wastewater to a publicly owned treatment works? Facilities that discharge wastewater to a POTW (publicly owned treatment works) are known as subject t
how to do soling for road
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