combi-wall systems - cas – central authentication...

www.fosterpiling.com(800) 848-6249

L.B. Foster is dedicated to offering the most efficient combi-wall system for your needs through utilizing a variety of systems. Using domestic wide f lange beams, extruded connectors from Pile Pro, and PZC™ sheet pile from Gerdau, L.B. Foster is able to put together the right package. Systems using the Wide Flange Beams and PZC sheet pile are 100% melted and manufactured in U.S.A.

The systems shown represent only a portion of the variations possible. Intermediate sheet pile function as earth retention and for load transfer. The sheet pile is only required to resist active earth pressures down to the zero earth pressure level and may extend below this level as a safety measure. Shortening the lengths of the intermediate sheet pile will reduce the cost of the job and facilitate installation.

Combi-Wall Systems

Specifying systems can be done either with a beam-connection-sheet or PZC-B configuration. The connection would be either a C for extruded connector, or F for cut f lange (i.e. W36 x 135-C-PZC 18). The PZC-B method is outlined in the Gerdau Sheet Piling Handbook starting on page 10.


Combi-Walls are piling walls that are comprised of high modulus structural components interspaced by lighter sheet piles. The high modulus components - known as king piles - can be tubular, box, bearing or other types of fabricated piles.

It is essential that a stable, heavy, adequately rigid and straight pile-driving template frame, adapted to suit the length and weight of the pilings, be provided.

The king piles are fixed into position within the template using welded bracket guides which take into account width tolerances.

Driving of the king piles must be carried out with extreme care in order to ensure that they are embedded straight and vertical, or at a prescribed batter, thereby guaranteeing that they are parallel to each other and at the required spacing.

The driving sequence of the king piles must ensure that the pile toe encounters soil uniformly on its total circumference and not just on one side.

This is achieved by driving in the following sequence

At least, however, the following sequence should be observed:

In general, all of the king piles should be driven in sequence to full penetration without interruption. Following successful completion of this, the intermediate light piling sections can be set and driven. During the setting and driving operations of the king piles, a constant check (using theodolites) should be made of their alignment in relation to the wall.

When the guide frames have been removed, a final survey should be made to ensure that the deviations in the distance between the king piles are within the acceptable tolerances in order to allow the proper installation of the sheet pile. However, if the deviations are outside the specified or practical tolerances, then either the intermediate piles have to be adjusted or the king piles must be extracted and re-driven.

To overcome difficult driving conditions, it may be possible to use: jetting; excavating inside the king piles; or any other the ground pre-treatment methods normally adopted for sheet piling.

Above text taken from the “NASSPA Best Practices Sheet Piling Installation Guide”

(large driving step)

(small driving step)

Combi-Wall Systems


Width Range: 50” - 80”Section Modulus Range (in3 / ft): 40-320

Moment of Inertia Range (in4 / ft): 700-6800

Wide Flange with Z-Profile Flanges

Width Range: 48” - 74”Section Modulus Range (in3 / ft): 40-335

Moment of Inertia Range (in4 / ft): 700-7070

Wide Flange with Extruded Connectors

Combi-Wall Solution VariationsL.B. Foster is dedicated to offering the most efficient combi-wall system

for your needs through utilizing our vast array of systems

100% Domestic Solutions:

Pipe Pile with Extruded Connectors

The properties are only limited to jobsiteand manufacturing restrictions.


L.B. Foster Combi-Wall systems can be supplied with a range of connections. Each connector series offers distinct advantages to assure you have the best system for your project.

One Leg BBS Connectors:Universal & in stock - ready for quick orders

Field or shop weld full length to beam

BBS Connectors:Produced to your job requirements

Field or shop weld full length to beam

WOM / WOF Connectors:Used in weight efficient pipe combi-walls

Field or shop weld full length to pipe

Z-Profile FlangesExtra laying width

Use any Z-Profile SheetShop fab & weld


BeamSystem Width

Section Modulus

Moment of Inertia

Weight in Poundslb / ft2

in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 69.30 72.2 1315 40.4 36.4 32.4

W33 x 130 69.33 80.2 1458 42.5 38.5 34.5

W36 x 135 69.77 85.5 1665 43.1 39.1 35.1

W40 x 149 69.63 98.4 2043 45.6 41.6 37.6

W40 x 167 69.63 113.5 2362 48.7 44.7 40.7

W40 x 183 69.63 127.3 2659 51.4 47.5 43.5

W40 x 199 73.57 134.6 2777 51.3 47.5 43.0

W40 x 215 73.57 148.5 3074 53.9 50.1 46.4

W40 x 249 73.57 170.4 3535 59.4 55.7 51.9

W40 x 277 73.65 188.7 3925 63.9 60.2 56.4

W40 x 297 73.65 198.8 4139 67.2 63.4 59.7

W40 x 321 73.73 213.0 4446 71.0 67.3 63.5

W40 x 372 73.88 245.8 5173 79.2 75.4 71.7% of sheet pile length to beam length

PZC™ 13 Combi-Wall Solution

Dimensions and Properties


BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 74.30 68.3 1298 39.0 35.0 31.0

W33 x 130 74.33 75.8 1433 40.9 36.9 32.9

W36 x 135 74.77 80.9 1639 41.4 37.5 33.5

W40 x 149 74.63 93.2 2008 43.8 39.8 35.8

W40 x 167 74.63 107.3 2308 46.7 42.7 38.7

W40 x 183 74.63 120.1 2588 49.2 45.3 41.3

W40 x 199 78.57 127.3 2703 49.2 45.4 41.7

W40 x 215 78.57 140.3 2983 51.7 47.9 44.1

W40 x 249 78.57 160.8 3419 56.8 53.1 49.3

W40 x 277 78.65 178.0 3787 61.1 57.3 53.5

W40 x 297 78.65 187.6 3989 64.1 60.4 56.6

W40 x 321 78.73 200.9 4278 67.7 63.9 60.2







BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 63.54 82.5 1502 44.1 39.7 35.4

W33 x 130 63.57 91.2 1658 46.3 42.0 37.6

W36 x 135 64.01 96.6 1882 47.0 42.6 38.3

W40 x 149 63.87 110.5 2295 49.7 45.3 41.0

W40 x 167 63.87 127.0 2642 53.1 48.7 44.4

W40 x 183 63.87 142.0 2966 56.1 51.7 47.4

W40 x 199 67.81 149.1 3076 55.6 51.6 47.5

W40 x 215 67.81 164.2 3398 58.5 54.4 50.3

W40 x 249 67.81 187.9 3899 64.5 60.4 56.3

W40 x 277 67.89 207.7 4322 69.4 65.3 61.2

W40 x 297 67.89 218.8 4554 72.9 68.8 64.7

W40 x 321 67.97 234.0 4886 77.1 73.0 68.9



BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 68.54 77.4 1469 42.2 37.9 33.6

W33 x 130 68.57 85.5 1616 44.3 40.0 35.7

W36 x 135 69.01 90.8 1838 44.9 40.6 36.3

W40 x 149 68.87 103.9 2238 47.4 43.1 38.8

W40 x 167 68.87 119.1 2564 50.6 46.3 42.0

W40 x 183 68.87 133.0 2867 53.4 49.1 44.8

W40 x 199 72.81 140.1 2976 53.1 49.0 45.0

W40 x 215 72.81 154.1 3278 55.7 51.7 47.6

W40 x 249 72.81 176.3 3748 61.3 57.3 53.2

W40 x 277 72.89 194.8 4145 65.9 61.8 57.8

W40 x 297 72.89 205.2 4363 69.2 65.1 61.1

W40 x 321 72.97 219.5 4674 73.0 69.0 64.9





BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 69.30 84.4 1537 48.6 42.9 37.3

W33 x 130 69.33 92.4 1680 50.6 45.0 39.4

W36 x 135 69.77 96.8 1886 51.2 45.6 40.0

W40 x 149 69.63 109.0 2264 53.7 48.1 42.5

W40 x 167 69.63 124.1 2583 56.8 51.2 45.6

W40 x 183 69.63 137.8 2880 59.5 53.9 48.3

W40 x 199 73.57 144.8 2986 59.0 53.7 48.4

W40 x 215 73.57 158.6 3283 61.6 56.3 51.0

W40 x 249 73.57 180.5 3744 67.1 61.8 56.5

W40 x 277 73.65 198.7 4134 71.6 66.3 61.0

W40 x 297 73.65 208.9 4348 74.9 69.6 64.3

W40 x 321 73.73 222.9 4655 78.7 73.4 68.1





BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%W33 x 118 74.30 79.2 1505 46.5 41.0 35.6

W33 x 130 74.33 86.7 1640 48.5 43.0 37.5

W36 x 135 74.77 91.1 1845 49.0 43.5 38.1

W40 x 149 74.63 102.8 2214 51.3 45.9 40.4

W40 x 167 74.63 116.9 2515 54.2 48.7 43.3

W40 x 183 74.63 129.7 2795 56.8 51.3 45.8

W40 x 199 78.57 136.5 2899 56.4 51.2 46.0

W40 x 215 78.57 149.5 3179 58.8 53.6 48.4

W40 x 249 78.57 170.1 3615 64.0 58.8 53.6

W40 x 277 78.65 187.2 3983 68.2 63.0 57.8

W40 x 297 78.65 196.8 4184 71.3 66.1 60.9

W40 x 321 78.73 210.1 4473 74.9 69.7 64.5





BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%36 x .500 94.1 70.1 1325 38.4 35.5 32.7

42 x .500 100.1 87.4 1916 39.9 37.3 34.6

42 x .625 100.1 106.6 2318 46.5 43.8 41.1

48 x .500 107.1 106.1 2645 41.3 38.8 36.3

48 x .625 107.1 130.0 3217 48.4 45.9 43.3

54 x .500 112.1 125.9 3517 42.5 40.1 37.8

54 x .625 112.1 154.7 4294 50.1 47.7 45.3

60 x .625 118.1 180.6 5555 51.6 49.3 47.1

60 x .750 118.1 214.2 6559 59.6 57.3 55.0

66 x .625 124.1 207.5 7003 53.0 50.8 48.7

66 x .750 124.1 246.3 8283 61..3 59.2 57.0

72 x .625 130.1 235.1 8642 54.2 52.2 50.1

72 x .750 130.1 279.4 10236 62.9 60.9 58.8% of sheet pile length to pipe length



BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%36 x .500 88.3 77.2 1461 40.9 37.9 34.8

42 x .500 94.3 94.8 2079 42.4 39.5 36.7

42 x .625 94.3 115.2 2505 49.3 46.5 43.6

48 x .500 100.3 113.9 2840 43.7 41.0 38.3

48 x .625 100.3 139.2 3444 51.1 48.5 45.8

54 x .500 106.3 134.2 3748 44.8 42.3 39.8

54 x .625 106.3 164.6 4567 52.8 50.3 47.8

60 x .625 112.3 191.1 5878 54.2 51.9 49.5

60 x .750 112.3 226.4 6934 62.6 60.2 57.9

66 x .625 118.3 218.6 7380 55.6 53.3 51.1

66 x .750 118.3 259.4 8723 64.3 62.1 59.8

72 x .625 124.3 247.0 9077 56.7 54.6 52.5




BeamSystem Width

Section Modulus

Moment of Inertia


in. in3 / ft in4 / ft 100% 80% 60%36 x .500 94.1 78.7 1489 44.4 40.3 36.3

42 x .500 100.1 94.4 2070 45.5 41.8 38.0

42 x .625 100.1 113.7 2472 52.1 48.3 44.5

48 x .500 107.1 111.9 2790 46.6 43.0 39.4

48 x .625 107.1 135.9 3362 53.7 50.1 46.5

54 x .500 112.1 130.8 3654 47.5 44.2 40.8

54 x .625 112.1 159.7 4431 55.1 51.7 48.3

60 x .625 118.1 184.9 5685 56.4 53.2 50.0

60 x .750 118.1 218.4 6689 64.3 51.1 57.9

66 x .625 124.1 211.1 7127 57.5 54.5 51.4

66 x .750 124.1 250.0 8407 65.9 62.8 59.8

72 x .625 130.1 238.3 8760 58.6 55.7 52.7



combi-wall systems - cas – central authentication...

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