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State the term - constant eccentricity
A pre-stressed concrete beam has a width of 300 mm and an overall depth of 450 mm. The permissible stresses in tension and compression due to pre-stressing alone are 5 N/mm2 and 30 N/mm2, respectively. Find the required pre-stressing force in the tendon and the eccentricity of the tendon, if a straight tendon with a constant eccentricity is to be provided in the beam.
A concrete contractor historical records show that the construction duration for a cast-in-place foundation formwork is 1,000-SF/crew-day. Determine the number of days a 200,000-SF
Q. Necessity of air voids in bituminous pavement? If the presence of air voids is too high, it results in an increase of permeability of bituminous pavement. This enables the f
Tensile stresses It has been possible to introduce tensile stresses of upto 850 N/mm 2 in tendons with the use of this method. But the method is not suited in situations where
Total loss of prestress The total amount of losses of prestresses may be accounted for in a prestressed concrete member by adding different losses which may take place for tha
A moist soil sample compacted into a mould of 1000 cm 3 capacity and weight 35 N, weighs 53.5 N with the mould. A representative sample of soil taken from it has an initial weight
Question What is device of cavitations in pipes and drains ? Answer Cavitations refer to arrangement of air foam in fluid in low-pressure condition that is lower than satura
Details of a simply-supported beam are given in Figures (a) and (b). Note that the dead load, g includes the self weight. Design the transverse shear reinforcement in ter
Q. Evaluate dimensions of apron according to Spring and Gales? Dimensions of apron according to Spring and Gales. Gales and Sethi favoured uniform thickness of laid apron while
A footing foundation for a water tower carries a load of 9000 kN and is 3.6 metres square. It rests on dense sand of 9 m thickness overlying a clay layer of 3 metres depth. The cla
Reason of loading on alternative spans to obtain maximum positive moment in a span of a continuous beam To attain a maximum sagging moment in a span of a continuous beam, gene
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