What is the difference between NP2 and NP3 Class RCC Hume
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Answer Posted / s k
NP-2 is collar joint & NP-3 is Rcc Ring with wicer joint
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manhole chamber having height of 2300 mm and thickness of brickwork is 230 mm and dia of opening covering is 560 mm and bottom length vertical is 1500 mm (1:4) brick masonry and plaster 12 mm on both sides..how to estimate the no bricks used with mortar cement bags and sand for total chamber including plaster.
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