bigrbridge.

com

Super•Cor
®
The Right Bridge. Built Right.
The Right Solution for Any Job.
When it comes to infrastructure projects, Big R Bridge is the design specialist with a
proven reputation for consistently delivering the right solutions, the right quality and the
right support throughout America. We know that high-quality products, engineering
excellence and innovative, proprietary designs – not to mention exemplary customer service
– are key to a successful business relationship.

The Right Choice.

From our modern production facilities in Greeley, Colorado and Fort Worth, Texas, along
with those of our partners in the AIL Group of Companies around the world, we design
and manufacture attractive and economical infrastructure solutions in a variety of sizes and
types, ranging from culverts and tunnels to bridges, underpasses and stream enclosures.
Give us your application and Big R technical representatives will work hard with your team
to find the right solution that best suits your needs.

The Right Quality.

Although we make a wide variety of products, they all share common attributes. Better
looks. Better quality. Better performance. Period. Better still, we readily provide on-site
assistance when needed and your order will be delivered to the job site on time, and ready
to assemble. Simply put, you’re always going to get Big R’s best and that’s a promise.

2
 Super•Cor
®

As Big R's revolutionary alternative to conventional bridges,

Super•Cor represents our commitment to continued
development in the field of corrugated metal structures.
Combining the advantages of lightweight construction with the superior strength and durability of galvanized
steel, Super • Cor is the most internationally accepted, and widely used corrugation profile on the market.

The sensible, Superior Strength. Lightweight Construction.

economical choice for: Super • Cor’s larger annular corrugations (381mm [15"] pitch
and 140mm [5.5"] depth) provide nine times the stiffness of
• Vehicle underpasses conventional structural plate. The lightweight, modular panels
• Bridges can be shipped easily and economically making it even more
advantageous for remote locations.
• Railway underpasses
• Box culverts Easy Installation
• Underground storage Simply put, Super • Cor saves time and money in installation. The
panels require significantly fewer bolts than conventional structural
• Stream enclosures/crossings plates and can be assembled adjacent to the job site, then moved
into place using relatively light equipment. And, if the road needs
• Storage magazines to be widened later, Super • Cor allows for easy extension with
• Wildlife underpasses/overpasses additional panels.

• Mine portals

3 Strong • Durable • Versatile

Versatile Environmentally-Responsible
Super • Cor’s corrugation profile permits construction Most Super • Cor structures used for stream crossings
of the largest, longest and widest spans in a variety are bottomless. These structure types, combined with
of configurations. Spans can exceed 25m (82') with lower-impact installation methods, virtually eliminate
Big R’s proprietary features. Special shapes are also deliberate streambed interference.
available, including Super • Cor reinforced box culverts
in spans exceeding 15m (50') with cover as shallow as
450mm (18").
Maintenance-Free
Unlike conventional bridges, which frequently require
substantial retrofits, properly-installed Super • Cor
Durable structures are relatively maintenance-free.
Super • Cor’s heavy galvanized coating is
metallurgically-bonded to the steel surface, providing
extended service life. Super • Cor is supplied with
Aesthetically-Pleasing
a standard 910g/m2 (3oz/ft2) coating. A heavier Once installed, Super • Cor becomes a naturally-
1220g/m2 (4 oz/ft2) coating is also available. Properly appealing structure. The geometry of the corrugations
designed and installed, Super • Cor structures will last both softens and reduces the intrusiveness
over 100 years. traditionally associated with man-made structures in
natural environments.

IDEAL FOR Mining companies take advantage of our technology to build some
of the largest and most economical bridges in remote locations,
REMOTE LOCATIONS such as this one in Australia.

4
 Ideal for many

Applications

BIG ON MINING: The world’s EMERGENCY MEASURES: Super•Cor® SAFER FOR EVERYONE: Deer
largest engineered corrugated saved time and money when a stroll across a newly-installed
arch helps preserve Whitehorse bridge washed out under Toronto, animal crossing in Poland.
Creek, Alberta. Ontario's busy Finch Avenue.

Mine Site Affordable Animal-Friendly

Infrastructure Bridge Crossings
With achievable span widths of over Replacement On today’s high-speed highways,
25m (82'), many of the world’s largest motorists and wildlife can often
mine sites use innovative Super• Cor Replacing aging bridges presents find themselves on opposite sides of
for its light weight, superior strength, unique challenges to traffic manage- sudden and devastating encounters.
versatility, ease of installation and en- ment and infrastructure budgets alike. The one thing they agree on, how-
vironmental friendliness. Super• Cor is Progressive engineers and specifiers ever, is that safety crossings made
perfect for use in many types of large- are turning to Super • Cor for its ease from Super • Cor provide low-cost,
scale engineered structures, such as: of installation and sheer economics. aesthetically pleasing and effective
• Heavy haul road arches Super • Cor’s variety of shapes and solutions for increased highway safety.
profiles, along with its environmental Super • Cor is ideal for animal-friendly
• Rail underpasses friendliness, make it perfect for: crossings like:
• Portals • Short and Medium Span Bridges • Highway overpasses and underpasses
• Stockpile tunnels • Box Culverts • Railway overpasses and underpasses
• Escape tunnels • Vehicle and Railway Underpasses
• Stream Enclosures/Crossings
• Grade Separations
5
 Super•Cor®

Super•Cor is the logical choice.

Super•Cor structures are manufactured and designed in accordance with AASHTO requirements.

Durability
Properly designed structures
will last 100-plus years.
“S” 16"

Handling 16"
Lightweight sections are economical to ship,
and easily handled by light equipment.

5 1/2"
Cost
Low installation and maintenance over the life 15"
cycle of the structure makes Super • Cor the
economical choice.

SPECIFICATIONS
Wall Thickness Tangent
Specified Uncoated (T) Area Length (TL) Angle(∆) Moment of Inertia Section Modulas Radius of Gyration
(mm) (in.) (mm) (in.) (mm2/mm) (in2./ft) (mm) (in.) (degrees) (mm4 /mm) (in4./in.) (mm3/mm) (in3./in) (mm) (in.)
3.5 0.140 3.42 0.135 4.784 2.260 110.8 4.361 49.75 11710.7 0.714 152.72 0.2367 49.48 1.948
4.2 0.170 4.18 0.165 5.846 2.762 109.8 4.323 49.89 14332.5 0.875 186.05 0.2884 49.52 1.949
4.8 0.188 4.67 0.184 6.536 3.088 109.2 4.299 49.99 16037.0 0.979 207.54 0.3217 49.54 1.950
5.5 0.218 5.45 0.215 7.628 3.604 108.2 4.259 50.13 18740.1 1.144 241.38 0.3741 49.57 1.952
6.3 0.249 6.23 0.245 8.716 4.118 107.2 4.220 50.28 21441.2 1.308 274.87 0.4260 49.60 1.943
7.1 0.280 7.01 0.276 9.807 4.633 106.1 4.179 50.43 24124.5 1.472 308.24 0.4776 49.64 1.954
8.1 0.319 8.00 0.315 11.06 5.225 104.9 4.131 50.62 27259.0 1.663 347.00 0.5380 49.65 1.955

Corrugation Profile: 381 mm x 140 mm (15 in. x 5.5 in.)

Finished Grade
Structural Cross Section
Recommended Height of Cover
Limits: Minimum – 18"
Maximum – 5'

6
 Super•Cor®
FOOTER OPTIONS
Super • Cor packages come with a variety of footer options to suit various sites:

• Precast or cast-in-place concrete footings – the most 600mm (24") below flow line. Note: When footer pads are
common footer type, in which a receiving angle is buried, the published end area of Super• Cor will be reduced.
embedded in concrete. • Full steel invert – for applications in erodible stream beds
• Steel footer pads – used as a time-saving alternative to requiring a corrugated steel floor or invert. To prevent
concrete in sites with non-erodible stream beds. If the undermining of the invert, we recommend the use of an
site permits, footings should be buried a minimum of optional toewall for the upstream and downstream ends.

Concrete Footing Corrugated Steel Footing

Side Angle

Super•Cor®
Side/Haunch
Concrete Footing

Super•Cor®
Base Channel
Inside Span
Hook Bolt With
Varies

Double Nuts

Varies Corrugated Steel Footing

(Thickness Varies)
Vari
1" x 1.25" es
15" 15" 15"
Slotted Holes

Super·Cor®
Base Channel
*Gap

*Note: Space base channel so that 15" c/c spacing of slotted holes in long leg is maintained

HEADWALL OPTIONS Headwall options include:

• MSE wall systems with welded wire walls or concrete faces
In addition to enhancing their appearance, well-designed
end treatments are essential to the structural and hydraulic • Concrete, cast-in-place or precast
performance of Super • Cor. • Welded wire gabion baskets
• Bolt-A-Bin® retaining wall systems
• Sheet Pile walls

7
Super•Cor Box
®

Super•Cor Boxes offer the perfect solution for long-span,

low-rise situations with shallow cover.
Super • Cor Boxes combine the strength and cost advantages of Super • Cor corrugation profile
with a special, patented reinforcement along the length of the structure. The extra strength of
this reinforcement permits designs exceeding 15m (50').

Your complete solution.

From preliminary specifications and
drawings through to project completion,
Big R is your single source for a
comprehensive engineered package
including the structure, footings,
headwalls, wingwalls, fascia finishes and
guiderail systems.

LOOKING GOOD: As shown here and opposite,

Super•Cor can be customized with many types
of functional and attractive end treatments.

8
 Super•Cor® Box

RISE
SPAN

Box Culvert

Box Details
CLEARANCE BOX
No. Span Rise End Area No. Span Rise End Area

RISE
(mm) (ft.-in.) (mm) (ft.-in.) (m2) (ft.2) (mm) (ft.-in.) (mm) (ft.-in.) (m2) (ft.2)
SC-1B 3170 10-5 1180 3-10 3.12 33.57 SC-33B 7405 24-3 1680 5-6 10.21 109.86
SC-2B 3550 11-8 1420 4-8 4.33 46.59 SC-34B 7800 25-7 1965 6-5 12.71 136.76
SC-3B 3840 12-7 1465 4-10 4.94 53.15 SC-35B 7945 26-1 2370 7-9 15.87 170.76
SC-4B 3965 13-0 2210 7-3 7.35 79.09 SC-36B 8575 28-2 1920 6-4 13.90 149.56
SC-5B 3865 12-8 1260 4-2 4.18 44.98 SPAN
SC-37B 8605 28-3 2325 7-8 17.38 187.01
SC-6B 4105 13-6 1860 6-1 6.56 70.59 SC-38B 8635 28-4 2735 9-0 20.89 224.78
SC-7B 4210 13-10 1310 High Profile
4-4 4.76 Arch 51.22 SC-39B 9145 30-0 1940 6-4 14.64 157.53
SC-8B 4735 15-6 1960 6-5 8.16 87.80 SC-40B 9225 30-3 2345 7-8 18.35 197.45
SC-9B 4550 14-11 1360 4-5 5.36 57.67 SC-41B 9310 30-6 2750 9-0 22.10 237.80
SC-10B 4890 16-0 1610 5-3 6.97 75.00 SC-42B 9810 32-2 2105 6-11 16.92 182.06
SC-11B 4860 15-11 2365 7-8 10.09 108.57 SC-43B 9865 32-4 2510 8-3 20.90 224.88
SC-12B 5155 16-11 2420 7-11 11.06 119.01 SC-44B 9920 32-6 2920 9-7 24.92 268.14
SC-13B 5215 17-1 1670 5-6 7.72 83.07 SC-45B 10460 34-4 2285 7-6 19.43 209.07
SC-14B 5360 17-7 2075 6-10 9.89 106.42 SC-46B 10485 34-5 2690 8-10 23.68 254.80
RISE

SC-15B 5320 17-5 1440 4-9 6.62 71.23 SC-47B 10515 34-6 3100 10-2 27.95 300.74
SC-16B 5445 17-10 2480 8-2 12.07 129.87 SC-48B 10895 35-9 2355 7-9 20.59 221.55
SC-17B 5655 18-6 1505 4-11 7.33 78.87 SC-49B 10940 35-10 2760 9-1 25.02 269.22
SC-18B 5955 19-6 2645 8-8 14.23 153.11 SC-50B
SPAN 10990 36-1 3165 10-5 29.47 317.10
SC-19B 5895 19-4 1595 5-3 8.17 87.91 SC-51B 11645 38-2 2530 8-4 23.31 250.82
SC-20B 6165 20-3 1900 6-3 10.33 111.15
SC-21B 6235 20-6 2715
Medium15.36
8-11
Arch SC-52B
Profile165.27 SC-53B
11700
11750
38-5
38-6
2935
3345
9-8
11-0
28.04
32.81
301.71
353.04
SC-22B 6320 20-9 1645 5-5 8.91 95.87 SC-54B 12270 40-3 2745 9-0 26.46 284.71
SC-23B 6480 21-3 1975 6-6 11.25 121.05 SC-55B 12290 40-4 3150 10-4 31.45 338.40
SC-24B 6495 21-4 2380 7-10 13.89 149.46 SC-56B 12315 40-5 3555 11-8 36.45 392.20
SC-25B 6645 21-10 1720 5-8 9.77 105.13 SC-57B 13028 42-9 2830 9-3 30.72 330.55
SC-26B 6970 22-10 1795 5-11 10.67 114.81 SC-58B 13050 42-10 3236 10-7 36.02 387.58
SC-27B 7000 23-0 2200 7-2 13.50 145.26 SC-59B 14092 46-3 3071 10-0 35.61 383.16
SC-28B 7025 23-1 2610 8-7 16.35 175.93 SC-60B 14111 46-4 3477 11-5 41.34 444.82
RISE

SC-29B 7290 23-11 1875 6-2 11.62 125.03 SC-61B 15020 49-3 3168 10-5 38.38 412.97
SC-30B 7300 23-11 2285 7-6 14.58 156.88 SC-62B 15038 49-4 3574 11-9 44.48 478.60
SC-31B 7310 24-0 2690 8-10 17.56 188.95 SC-63B 15579 51-1 3845 12-7 49.46 532.19
SC-32B 7315 24-0 3095 10-2 20.52 220.80 SPAN
SC-64B 15748 51-8 3994 13-1 52.12 560.81

Low Profile Arch

Larger sizes and other shapes available upon request. Measurements are to inside crest of corrugation.
RISE

9
Super•Cor
® SAVE TIME AND MONEY: Super•Cor structures
erect quickly with less labour and
transportation costs. In some cases, vital

Arch
24-hour traffic is not even interrupted.

Super•Cor Arches surpass the range of

conventional plate arches with spans
exceeding 25m (82 ft). They can be installed
with minimal environmental impact.
High-profile Super • Cor arches are ideal for highway grade
separations or in applications requiring large end areas or
wider spans.

Your complete solution.

Big R is your single source for a comprehensive engineered
package including the structure, footings, headwalls,
wingwalls, fascia finishes and guiderail systems.

10
 Super•Cor® Arch
Typical Arch Profile

Rc
β

Arch Details
θ
R
s

CLEARANCE BOX
RISE

RISE
RISE

RISE
SPAN SPAN SPAN SPAN

High Profile Arch Medium Profile Arch Low Profile Arch Standard Arch

Arch Max. Span Bottom Span Total Rise End Area Total Arch Max. Span Bottom Span Total Rise End Area Total
No. (mm) (ft.-in.) (mm) (ft.-in.) (mm) (ft.-in.) (m2) (ft.2) S No. (mm) (ft.-in.) (mm) (ft.-in.) (mm) (ft.-in.) (m2) (ft.2) S
SCA1 6990 22-11 6990 22-11 3495 11-5 19.20 207 27 SCA40 13500 44-3 13479 44-3 4612 15-2 50.12 540 45
SCA2 7250 23-9 7250 23-9 3625 11-11 20.60 222 28 SCA41 13980 45-10 13980 45-10 6985 29-11 76.70 826 54
SCA3 7510 24-8 7510 24-8 3755 12-4 22.10 238 29 SCA42 14000 45-11 13958 45-10 4877 16-0 54.88 591 47
SCA4 7640 25-1 7640 25-1 3820 12-6 23.70 255 30 SCA43 14000 45-11 13872 45-6 6543 21-6 75.91 817 54
SCA5 8000 26-3 7994 26-3 3594 11-9 23.53 253 30 SCA44 14000 45-11 13641 44-9 7009 23-0 83.57 900 57
SCA6 8030 26-4 8030 26-4 4015 13-2 25.30 272 31 SCA45 14500 47-7 14433 47-4 5150 16-11 59.87 644 49
SCA7 8290 27-2 8290 27-2 4140 13-7 27.00 290 32 SCA46 15000 49-3 14960 49-1 5232 17-2 62.15 669 50
SCA8 8550 28-1 8550 28-1 4270 14-0 28.70 308 33 SCA47 15000 49-3 14780 48-6 7022 23-0 87.32 940 58
SCA9 8800 28-10 8800 28-10 4400 14-5 30.40 327 34 SCA48 15000 49-3 14663 48-1 7351 24-1 92.90 1000 60
SCA10 9000 29-6 8983 29-6 3760 12-4 28.15 303 33 SCA49 15010 49-3 15010 49-3 7505 24-11 88.50 952 58
SCA11 9000 29-6 8724 28-7 5168 16-11 40.67 438 40 SCA50 15500 50-10 15441 50-8 5520 18-1 67.55 727 52
SCA12 9060 29-9 9060 29-9 4530 14-10 32.20 347 35 SCA51 15530 50-11 15530 50-11 7765 25-6 94.70 1019 60
SCA13 9320 30-7 9320 30-7 4660 15-3 34.10 367 36 SCA52 16000 52-6 15942 52-4 4922 16-2 64.47 694 52
SCA14 9500 31-2 9456 31-0 3956 13-0 31.54 340 35 SCA53 16000 52-6 15870 52-1 6666 21-10 89.41 962 59
SCA15 9580 31-5 9580 31-5 4790 15-9 36.00 388 37 SCA54 16000 52-6 15543 51-0 7982 26-2 111.11 1196 66
SCA16 9840 32-3 9840 32-3 4920 16-2 38.00 409 38 SCA55 16050 52-8 16050 52-8 8025 26-4 101.10 1088 62
SCA17 10000 32-10 9967 32-8 3961 13-0 33.14 357 36 SCA56 16500 54-2 16406 53-10 5168 16-11 69.78 751 54
SCA18 10000 32-10 9740 31-11 4547 14-11 38.93 419 39 SCA57 16570 54-8 16570 54-8 8280 27-2 107.70 1160 64
SCA19 10000 32-10 9690 31-9 5371 17-7 47.06 507 43 SCA58 17000 55-9 16930 55-7 5224 17-2 72.02 775 55
SCA20 10100 33-2 10100 33-2 5045 16-6 40.00 431 39 SCA59 17000 55-9 16909 55-6 6720 22-1 94.96 1022 61
SCA21 10360 34-0 10360 34-0 5175 17-0 42.10 453 40 SCA60 17000 55-9 16478 54-0 8483 27-10 124.98 1345 70
SCA22 10500 34-5 10476 34-4 3974 13-9 34.75 374 37 SCA61 17220 56-6 17220 56-6 8610 28-4 114.60 1233 66
SCA23 10870 35-8 10870 35-8 5435 17-10 46.40 500 42 SCA62 17500 57-5 17451 57-3 5285 17-4 74.29 800 56
SCA24 11000 36-1 10947 35-11 4193 13-9 38.53 415 39 SCA63 17600 57-8 17600 57-8 8800 28-10 121.60 1309 68
SCA25 11000 36-1 10697 35-1 4776 15-8 44.86 483 42 SCA64 18000 59-1 17921 58-10 5547 18-2 80.14 863 58
SCA26 11000 36-1 10642 35-3 5864 19-3 56.27 606 47 SCA65 18000 59-1 17886 58-8 6999 23-0 104.17 1121 64
SCA27 11390 37-4 11390 37-4 5695 18-8 50.90 548 44 SCA66 18110 59-5 18110 59-5 9068 29-9 128.90 1387 70
SCA28 11500 37-9 11462 37-7 4221 13-10 40.26 433 40 SCA67 18500 60-8 18447 60-6 5617 18-5 82.59 889 59
SCA29 11910 39-1 11910 39-1 5955 19-6 55.70 599 46 SCA68 19000 62-4 18912 62-1 5889 19-4 88.82 956 61
SCA30 12000 39-4 11974 39-3 4259 14-0 42.02 452 41 SCA69 19000 62-4 18926 62-1 7099 23-3 110.10 1185 66
SCA31 12000 39-4 11781 38-8 5639 18-6 57.10 615 47 SCA70 19150 62-10 19150 62-10 9576 31-5 155.81 1550 74
SCA32 12000 39-4 11612 38-0 6113 20-0 63.68 685 50 SCA71 19500 64-0 19448 63-10 5968 19-7 91.46 984 62
SCA33 12430 40-9 12430 40-9 6210 20-4 60.60 652 48 SCA74 20190 66-3 20190 66-3 10083 33-1 160.00 1722 78
SCA34 12500 41-0 12447 40-10 4501 14-9 46.26 498 43 SCA76 20700 67-11 20700 67-11 10360 34-0 168.30 1812 80
SCA35 12940 42-6 12940 42-6 6470 21-3 65.80 708 50 SCA78 21210 69-7 21210 69-7 10620 34-10 176.80 1903 82
SCA36 13000 42-8 12964 42-6 4553 14-11 48.18 519 44 SCA82 22250 73-0 22250 73-0 11125 36-6 194.50 2094 86
SCA37 13000 42-8 12745 41-10 5890 19-4 64.39 693 50 SCA86 22760 74-8 22760 74-8 11380 37-4 203.60 2192 88
SCA38 13000 42-8 12662 41-6 6460 21-2 72.07 776 53 SCA90 24000 78-9 24000 78-9 12040 39-6 227.40 2448 93
SCA39 13460 44-2 13460 44-2 6730 22-1 71.10 765 52 SCA94 25000 82-0 25000 82-0 12500 41-0 245.40 2642 96

Note: All dimensions are to inside crest of steel. 114mm (4.5”) edge distance of steel is
included in side arc length and angle. Structure numbers in bold denotes single
radius arch. Other sizes and plate configurations are available upon request.

11
 Super•Cor Round
®

Super•Cor Round structures permit

construction of dramatically larger diameters
than was previously possible with conventional
structural plate pipe configurations.

Super • Cor is the obvious choice for remote

locations where concrete is more expensive
or just not accessible as well as areas with
poor foundations. This common and very
versatile shape is frequently chosen for
culverts, sewers and sub-drains, but it can
also be used for storage bins, access ways,
tunnels, bridges, and storm water retention/
detention systems.

THE STRONGEST: In mine sites around

the world, Super • Cor is used under
huge stock piles.

Round Details Pipe

No.
Diameter
(mm)
End Area
(ft.-in.)
Total
(mm2) (ft.2) S*
SC66R 8400 27-7 55.4 596 66
SC68R 8650 28-5 58.7 632 68
SC70R 8910 29-2 62.3 671 70
SC72R 9170 30-1 66.0 710 72
SC74R 9430 30-11 69.8 751 74
SC76R 9690 31-10 73.7 793 76
SC78R 9950 32-7 77.7 836 78
SC80R 10200 33-6 81.7 879 80
SC82R 10460 34-4 85.9 925 82
SC84R 10720 35-2 90.2 971 84
SC86R 10980 36-0 94.6 1018 86
SC88R 11240 36-11 99.2 1068 88
SC90R 11500 37-8 103.8 1117 90
SC94R 12020 39-5 113.4 1221 94
SC98R 12530 41-1 123.3 1327 98
SC102R 13050 42-10 133.7 1439 102
SC106R 13570 44-6 144.6 1556 106
SC110R 14080 46-2 155.7 1676 110
*S = 406mm (16") measured along the circumference. SC114R 14600 47-11 167.4 1802 114
**Other sizes available upon request. SC118R 15120 49-7 179.5 1932 118
Measurements are to inside crest of corrugation. SC122R 15640 51-4 192.1 2068 122
12
 We support all of our products
with professional engineering,
project consultation, innovative
solutions and installation
expertise. In short, we’re always
ready to provide assistance
and recommendations for any
project using Big R products.

Design and
Installation
Big R’s reputation for excellence extends
well beyond developing innovative,
superior steel products.

13
 Design and Installation

Installation Assembly End Finishes

Super • Cor® structures distribute A Super • Cor structure arrives at the Special attention must be paid to
superimposed loads to the surrounding job site in bundles curved to the proper beveled or skewed ends. Incomplete
‘engineered’ backfill, so it is essential radius. Included are bolts and any structural rings must be reinforced
to use care during installation other special hardware that may be with steel or concrete (or tied back) to
and backfilling to ensure proper required, instructions and a diagram maintain structural integrity. Exercise
performance. The following guidelines listing all components. Assembly is caution when placing backfill around
will help ensure a successful project. easy, requiring relatively simple tools. them to avoid distortion.
Correct lapping, bolt-tightening and Standard End Finishes are:
shape-monitoring are all important to
Excavation achieve the correct design dimensions. • Squared
Trench excavation will vary, depending Your Big R representative can provide • Beveled
on the nature of the in situ material. information and assistance to those
• Partially-beveled
It is necessary to provide an excavated unfamiliar with structural plate assembly.
area that ensures adequate distance • Skewed
from soils with questionable structural
integrity. If the native soil is stable, Backfill
excavate only that area required to Super • Cor structures require The NCSPA handbook provides a new,
provide minimum bedding and enough a stable, engineered backfill to detailed section on backfilling and the
room for compaction equipment retain their shape and structural hydraulics of various steel structures.
to manoeuvre. For stream crossing integrity. The quality of the backfill Your Big R representative can provide
applications, local authorities will envelope depends on the choice of you with a copy of the handbook.
impose guidelines for construction material, placement of backfill, and
activity. compaction of the envelope. Local
engineering departments normally
have specifications detailing suitable
Foundations backfill material for flexible structures.
Super • Cor structures are flexible and However, there is no substitute for
can accommodate some differential an examination by a geotechnical
settlement without distress. It is engineer. A well-graded, free-draining
important, nevertheless, to minimize granular backfill is preferred.
differential settlement by removing and
replacing poor foundation material, or
by using a pile foundation. Preparation Inspection
should be confined to minimum, but Inspection should be performed on a
practical, widths and should result in full-time basis by qualified personnel.
a uniform base for the structure. A Backfill is placed in a balanced manner
bedding of loose material will provide in 150mm (6") to 200mm (8") lifts
a slight cushion and the bedding for the entire backfill envelope.
may be flat or shaped, depending Compaction testing is required
on the structure configuration and to ensure that backfill material is
construction methods being used. It is compacted to a minimum of 95%
essential that all corrugations be filled. Standard Proctor Density. It is a
good idea to assess the compaction
equipment and have its use approved
by the geotechnical engineer or
qualified inspector.

14
 PRODUCTS AND SERVICES
• Corrugated Steel Pipe • Modular Vehicular Bridges • Bridge Deck

• Corrugated Steel Pipe Arch • Pedestrian Bridges • Sheet Piling

• Super•Cor® Plate Bridges • Sandia Bridges™ • Cattleguards

• Bolt-A-Plate™ Structural Plate • Detour Bridges • Water Control Gates

• Precast Panel Retaining Walls • Skyway Bridges • Guardrail Systems

• Welded Wire Retaining Walls • Bridge Abutments

• Dur-A-Span® Aluminum Structural Plate

• Bolt-A-Bin™ Bin Type Retaining Wall

bigrbridge.com
The Right Bridge. Built Right.

Greeley, Colorado Big R Bridge is a proud member of

Phone: (970) 356-9600 the AIL Group of Companies.
Fax: (970) 356-9621
Fort Worth, Texas
Phone: (817) 788-9118 FOR ASSISTANCE IN PRICING, ORDERING, OR UNUSUAL INSTALLATIONS,
Fax: (817) 507-0197 CALL TOLL FREE IN NORTH AMERICA: 1 800•234•0734
BIGRBRIDGE.COM
08/2008

THE INFORMATION, SUGGESTED APPLICATIONS AND TABLES IN THIS BROCHURE ARE ACCURATE AND CORRECT TO THE BEST OF OUR KNOWLEDGE, AND ARE INTENDED FOR GENERAL INFORMATION
PURPOSES ONLY. THESE GENERAL GUIDELINES ARE NOT INTENDED TO BE RELIED UPON AS FINAL SPECIFICATIONS, AND WE DO NOT GUARANTEE SPECIFIC RESULTS FOR ANY PARTICULAR PURPOSE.
WE STRONGLY RECOMMEND CONSULTATION WITH A BIG R BRIDGE TECHNICAL REPRESENTATIVE BEFORE MAKING ANY DESIGN AND PURCHASING DECISIONS.