Answer / surya v kuchibhotla

The classification is made based on the longitudinal and
spiral reinforcement and based on the three edge bearing
test loads. Also it depends on the reinforcement provided in
socket of pipes for rubber ring joint.
NP-1 Class pipes are unreinforced concrete, non pressure
pipes. These are used for drainage and irrigation use above
Ground level or in shallow trenches.
NP-2 class are reinforced concrete pipes, light duty and non
pressure pipes.
NP-3 class are Medium duty non-pressure pipes used for
drainage and irrigation use, for culverts carrying medium
traffic.
NP-4 class are Heavy duty, reinforced concrete pipes.Used
for drainage, Irrigation, culverts with heavy traffic and
are suitable even for Railway loading.

Answer / sjtbehera

yes i agree with Mr. surya v Kuchibhota.

thia is as per IS:458-1988

Answer / deep kotadiya

Basically on field terms the difference to understand its usage is
NP stands for non pressure
And NP 2, NP 3, NP 4 are categories of pipe to be layed according to the demand, factors including depth, load and volume or flow in the pipe.
NP 2 for shallow depth and least flow
NP 3 has more steel than NP 2 and can be layed in more depth
NP 4 more steel than NP 3 in order to resist in deeper depth and max. Load
All pipes works economically under the gravitational force, still pump house are there in order to tackle difficulties.

what is the formula of calculating number of bars?

3 Answers   Ameyas,

---

how do we calculate quantity of cement , sand and aggregates in 1 m3 of M30 grade concrete ?

31 Answers   ABES Engineering College, Gammon, Jalanidhi, NCC,

---

which is the cheapest type of flooring (say for using for 6 months in a factory building & dismantling it)?

0 Answers  

---

In colomn reinforcement when dia of bar is going to change, than what should be the lap length of bars weather it should be of heigher dia bar lap length or it should the accordance with new dia bar. the grade of concrete is same.

11 Answers  

---

how sir calculate the slab steel and sir i want to know that how i calculate shutter works payments in cum and the rate is 120 per cum

1 Answers  

---

What is the cost of shuttering per Sqm.? How it is calculate by thumb rule...?

0 Answers  

---

What is the proportion in M-20, M-25, M-30 grade of concrete?

4 Answers   ACIL,

---

What is the actual consumption of bindingwire Per MT for multi-storied housing construction

5 Answers  

---

1cubic meter of bricks = ? kg

1 Answers  

---

Briks type

1 Answers  

---

Any bopdy tell me how to prepare rate analysis for Centering and shuttering for RAFT FOUNDATION, SUSPENDED FLOORS, STAIR CASES, RETAINING WALLS, SHEAR WALL and COLUMNS

1 Answers  

---

Clarify the out turn of steel fixer in construction field

2 Answers  

---