RCP Pipe Sizes
RCP Pipe Sizes
(OP)
I am just making sure that 21" and 27" diameter concrete pipes are manufactured.
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RE: RCP Pipe Sizes
Hope this helps!
Jim Lee, P.E.
City of Tallahassee
Stormwater Division
RE: RCP Pipe Sizes
RE: RCP Pipe Sizes
RE: RCP Pipe Sizes
In Harrisburg, PA typical cost differentials are as follow (I have done a simple ratio of Q to cost):
RCP Class 3 (typical, mid-weight stuff)
Dia Q,s=.005 $/lf delta Q delta $
15 3.7 11.4
18 4.2 12.0 0.1 0.1
21 4.6 15.6 0.1 0.3
24 5.1 17.7 0.1 0.1
27 5.5 22.0 0.1 0.2
30 5.9 24.0 0.1 0.1
36 6.7 34.5 0.1 0.4
42 7.4 47.0 0.1 0.4
48 8.1 58.5 0.1 0.2
60 9.4 93.5 0.2 0.6
It looks like the biggest rip-off would be increasing from 48" to 60". 21", 27" do not appear to be as inefficient as even 30" to 36", and 42" no more so. This has been an informative exercise for me, as I use 36" RCP quite often.
RE: RCP Pipe Sizes
RCP Class 3 (typical-midweight stuff)
Dia "Q,s=.005" $/lf delta Q/delta $
15 4.6 11.4
18 7.4 12.0 12
21 11.2 15.6 2
24 16.0 17.7 3
27 21.9 22.0 2
30 29.0 24.0 4
36 47.1 34.5 1
42 71.1 47.0 1
48 101.6 58.5 2
60 184.3 93.5 1
It appears that the biggest bargain is to increase from 15" to 18", 12:1 Q to cost ratio. Increasing to 21, 27 and 42 inch pipes do not add unacceptably to the cost, relative to their respective next lower size.
RE: RCP Pipe Sizes