Standard Pipe Arch Sizes

pipe arch

Are there standard sizes of pipe arch, and if so, what are they?

By the way, a pipe arch is a culvert with a flattened (but not completely flat) bottom.  The culvert has three radii, a large one on the bottom, a small one in the bottom corners, and a normal one in the upper half.

ASTM A760 is the standard that governs the manufacture of corrugated steel pipe, and the pipe arch sizes are defined as follows:

 

Pipe Arch Size (in.) Cross-sectional Area (ft2) Springline Rise, B (ft) Top Radius (ft) Bottom Corner Radius (ft) Bottom Radius (ft)
17 x 13 1.1 4 1/8 8 5/8 3 1/2 25 5/8
21 x 15 1.6 4 7/8 10 3/4 4 1/8 33 1/8
20 x 16 1.7 5 1/8 10 1/4 5 27 1/2
23 x 19 2.3 5 7/8 11 5/8 5 3/8 34 1/4
24 x 18 2.2 5 5/8 11 7/8 4 7/8 34 5/8
27 x 21 3.0 6 3/4 13 1/2 5 3/4 40 7/8
28 x 20 2.9 6 1/2 14 5 1/2 42 1/4
33 x 26 4.7 8 3/4 16 5/8 7 1/8 51 3/8
35 x 24 4.5 8 1/8 17 7/8 6 7/8 55 1/8
40 x 31 6.7 10 3/8 20 1/4 8 3/8 62 1/2
42 x 29 6.5 9 3/4 21 1/2 8 1/4 66 1/8
46 x 36 9.2 12 3/8 23 1/4 9 3/4 73
49 x 33 8.9 11 3/8 25 1/8 9 5/8 77 1/4
53 x 41 11.7 15 1/4 28 1/16 10 3/16 73 7/16
57 x 38 11.6 13 28 5/8 11 88 1/4
60 x 46 15.6 20 1/2 29 3/8 18 3/4 51 1/8
64 x 43 14.7 14 5/8 32 1/4 12 3/8 99 1/4
66 x 51 19.3 22 3/4 32 5/8 20 3/4 56 1/4
71 x 47 18.1 16 1/4 35 3/4 13 3/4 110 1/4
73 x 55 23.2 25 1/8 36 3/4 22 7/8 63 3/4
77 x 52 21.9 17 7/8 39 3/8 15 1/8 121 1/4
81 x 59 27.4 23 3/4 39 1/2 20 7/8 82 5/8
83 x 57 26.0 19 1/2 43 16 1/2 132 1/4
87 x 63 32.1 25 3/4 43 3/8 22 5/8 92 1/4
95 x 67 37.0 27 3/4 47 24 3/8 100 1/4
103 x 71 42.4 29 3/4 51 1/4 26 1/8 111 5/8
112 x 75 48.0 31 5/8 54 7/8 27 3/4 120 1/4
117 x 79 54.2 33 5/8 59 3/8 29 1/2 131 3/4
128 x 83 60.5 35 5/8 63 1/4 31 1/4 139 3/4
137 x 87 67.4 37 5/8 67 3/8 33 149 1/2
142 x 91 74.5 39 1/2 71 5/8 34 3/4 162 3/8

Although not included in the ASTM standard, the industry felt the need for a few larger sizes, and as a result the following are widely available:

Pipe Arch Size (in.) Cross-sectional Area (ft2) Largest Horizontal Dimension, B (ft) Top Radius (ft) Bottom Corner Radius (ft) Bottom Radius (ft)
150 x 96 81 41 76 36 172
157 x 101 89 43 80 38 180
164 x 105 98 45 82 40 184
171 x 110 107 47 85 41 190

 

About Bernie Roseke

Bernie Roseke, P.Eng., PMP, is the president of Roseke Engineering. As a bridge engineer and project manager, he manages projects ranging from small, local bridges to multi-million dollar projects. He is also the technical brains behind ProjectEngineer, the online project management software for engineers. He is a licensed professional engineer, certified project manager, and six sigma black belt. He lives in Lethbridge, Alberta, Canada, with his wife and two kids.

Comments

  1. Amanda Jimenez says:

    Hello I am a student working on a senior design project and I was wondering if I could get cost estimates for the following sized pipe archs: 142 x 91 and 171 x 110. Each 20 ft lengths.

    Thank you

    • Bernie Roseke says:

      You’re probably looking at $200 – $250 per foot for 142″ x 91″ pipe arch and $250 – $300 per foot for 171 x 110 pipe arch.

      If you want it straight from the source, call up your local Contech (or any supplier listed in NCSPA member list) and ask them for a “budget” number. Engineers do that all the time when they need a general idea of prices.

  2. Ignacio Estipona says:

    Cost for 3 pcs- 21″x15″x 14′ pipe arch, ga.16, corrugated galvanized ,delivered San Diego project site.

    • Bernie Roseke says:

      Hi Ignacio,

      You’re dealing with some pretty small ditch culvert material, only 14 feet worth. The shipping will probably be more than the pipe. Why wouldn’t you use regular round CSP for that? I didn’t know they make pipe arches that small but in any case, I don’t manufacturer culverts so you need to just talk to a supplier and get a quote. All of the suppliers in your area should be found on the NCSPA member list.

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