Serving NE, IA, MO including the Greater Omaha area
Our Nebraska, Iowa, and Missouri Service Area
Cities in Adams County, IA
Corning
Nodaway
Prescott

Cities in Audubon County, IA
Audubon
Brayton
Exira
Gray
Hamlin
Kimballton

Cities in Buena Vista County, IA
Albert City
Alta
Linn Grove
Marathon
Newell
Rembrandt
Sioux Rapids
Storm Lake
Truesdale

Cities in Calhoun County, IA
Farnhamville
Jolley
Knierim
Lake City
Lohrville
Lytton
Manson
Pomeroy
Rockwell City
Somers

Cities in Carroll County, IA
Arcadia
Breda
Carroll
Coon Rapids
Dedham
Glidden
Halbur
Lanesboro
Lidderdale
Manning
Templeton

Cities in Cass County, IA
Anita
Atlantic
Cumberland
Griswold
Lewis
Marne
Massena
Wiota

Cities in Cherokee County, IA
Aurelia
Cherokee
Cleghorn
Larrabee
Marcus
Meriden
Quimby
Washta

Cities in Clay County, IA
Dickens
Everly
Fostoria
Gillett Grove
Greenville
Peterson
Royal
Spencer
Webb

Cities in Crawford County, IA
Arion
Charter Oak
Deloit
Denison
Dow City
Kiron
Manilla
Ricketts
Schleswig
Vail
Westside

Cities in Dickinson County, IA
Arnolds Park
Lake Park
Milford
Okoboji
Spirit Lake
Superior
Terril

Cities in Emmet County, IA
Armstrong
Dolliver
Estherville
Ringsted
Wallingford

Cities in Fremont County, IA
Farragut
Hamburg
Imogene
Percival
Randolph
Riverton
Sidney
Tabor
Thurman

Cities in Harrison County, IA
Dunlap
Little Sioux
Logan
Magnolia
Missouri Valley
Modale
Mondamin
Persia
Pisgah
Woodbine

Cities in Ida County, IA
Arthur
Battle Creek
Galva
Holstein
Ida Grove

Cities in Lyon County, IA
Alvord
Doon
George
Inwood
Larchwood
Lester
Little Rock
Rock Rapids

Cities in Mills County, IA
Emerson
Glenwood
Hastings
Henderson
Malvern
Pacific Junction
Silver City

Cities in Monona County, IA
Blencoe
Castana
Mapleton
Moorhead
Onawa
Rodney
Soldier
Ute
Whiting

Cities in Montgomery County, IA
Elliott
Grant
Red Oak
Stanton
Villisca

Cities in Obrien County, IA
Archer
Calumet
Hartley
Paullina
Primghar
Sanborn
Sheldon
Sutherland

Cities in Osceola County, IA
Ashton
Harris
Melvin
Ocheyedan
Sibley

Cities in Page County, IA
Blanchard
Braddyville
Clarinda
Coin
College Springs
Essex
Northboro
Shambaugh
Shenandoah
Yorktown

Cities in Palo Alto County, IA
Ayrshire
Curlew
Cylinder
Emmetsburg
Graettinger
Mallard
Ruthven

Cities in Plymouth County, IA
Akron
Hinton
Kingsley
Le Mars
Merrill
Remsen
Westfield

Cities in Pocahontas County, IA
Fonda
Havelock
Laurens
Palmer
Plover
Pocahontas
Rolfe
Varina

Cities in Pottawattamie County, IA
Avoca
Carson
Carter Lake
Council Bluffs
Crescent
Hancock
Honey Creek
Macedonia
Mc Clelland
Minden
Neola
Oakland
Treynor
Underwood
Walnut

Cities in Sac County, IA
Auburn
Early
Lake View
Nemaha
Odebolt
Sac City
Schaller
Wall Lake

Cities in Shelby County, IA
Defiance
Earling
Elk Horn
Harlan
Irwin
Kirkman
Panama
Portsmouth
Shelby
Westphalia

Cities in Sioux County, IA
Alton
Boyden
Chatsworth
Granville
Hawarden
Hospers
Hull
Ireton
Maurice
Orange City
Rock Valley
Sioux Center

Cities in Taylor County, IA
Bedford
Blockton
Clearfield
Gravity
Lenox
New Market
Sharpsburg

Cities in Woodbury County, IA
Anthon
Bronson
Correctionville
Cushing
Danbury
Hornick
Lawton
Moville
Oto
Pierson
Salix
Sergeant Bluff
Sioux City
Sloan
Smithland

Cities in Atchison County, MO
Fairfax
Rock Port
Tarkio
Watson
Westboro

Cities in Holt County, MO
Craig
Forest City
Maitland
Mound City
Oregon

Cities in Nodaway County, MO
Barnard
Burlington Junction
Clearmont
Clyde
Conception
Conception Junction
Elmo
Graham
Guilford
Hopkins
Maryville
Parnell
Pickering
Ravenwood
Skidmore

Cities in Adams County, NE
Ayr
Hastings
Holstein
Juniata
Kenesaw
Roseland

Cities in Antelope County, NE
Brunswick
Clearwater
Elgin
Neligh
Oakdale
Orchard
Royal

Cities in Blaine County, NE
Brewster
Dunning
Purdum

Cities in Boone County, NE
Albion
Belgrade
Cedar Rapids
Petersburg
Primrose
Saint Edward

Cities in Boyd County, NE
Bristow
Butte
Lynch
Naper
Spencer

Cities in Brown County, NE
Ainsworth
Johnstown
Long Pine

Cities in Buffalo County, NE
Amherst
Elm Creek
Gibbon
Kearney
Miller
Odessa
Pleasanton
Ravenna
Riverdale
Shelton

Cities in Burt County, NE
Craig
Decatur
Lyons
Oakland
Tekamah

Cities in Butler County, NE
Abie
Bellwood
Brainard
Bruno
David City
Dwight
Linwood
Rising City
Surprise
Ulysses

Cities in Cass County, NE
Alvo
Avoca
Cedar Creek
Eagle
Elmwood
Greenwood
Louisville
Manley
Murdock
Murray
Nehawka
Plattsmouth
South Bend
Union
Weeping Water

Cities in Cedar County, NE
Belden
Coleridge
Fordyce
Hartington
Laurel
Magnet
Randolph
Saint Helena
Wynot

Cities in Clay County, NE
Clay Center
Deweese
Edgar
Fairfield
Glenvil
Harvard
Inland
Ong
Saronville
Sutton
Trumbull

Cities in Colfax County, NE
Clarkson
Howells
Leigh
Rogers
Schuyler

Cities in Cuming County, NE
Bancroft
Beemer
West Point
Wisner

Cities in Custer County, NE
Anselmo
Ansley
Arnold
Broken Bow
Callaway
Comstock
Mason City
Merna
Oconto
Sargent
Westerville

Cities in Dakota County, NE
Dakota City
Emerson
Homer
Hubbard
Jackson
South Sioux City

Cities in Dawson County, NE
Cozad
Eddyville
Farnam
Gothenburg
Lexington
Overton
Sumner
Willow Island

Cities in Dixon County, NE
Allen
Concord
Dixon
Maskell
Newcastle
Ponca
Wakefield
Waterbury

Cities in Dodge County, NE
Ames
Dodge
Fremont
Hooper
Nickerson
North Bend
Scribner
Snyder
Uehling
Winslow

Cities in Douglas County, NE
Bennington
Boys Town
Elkhorn
Omaha
Valley
Waterloo

Cities in Fillmore County, NE
Exeter
Fairmont
Geneva
Grafton
Milligan
Ohiowa
Shickley
Strang

Cities in Franklin County, NE
Bloomington
Campbell
Franklin
Hildreth
Naponee
Riverton
Upland

Cities in Frontier County, NE
Curtis
Eustis
Maywood
Moorefield
Stockville

Cities in Furnas County, NE
Arapahoe
Beaver City
Cambridge
Edison
Hendley
Holbrook
Oxford
Wilsonville

Cities in Gage County, NE
Adams
Barneston
Beatrice
Blue Springs
Clatonia
Cortland
Filley
Liberty
Odell
Pickrell
Virginia
Wymore

Cities in Garfield County, NE
Burwell

Cities in Gosper County, NE
Elwood
Smithfield

Cities in Greeley County, NE
Greeley
Scotia
Spalding
Wolbach

Cities in Hall County, NE
Alda
Cairo
Doniphan
Grand Island
Wood River

Cities in Hamilton County, NE
Aurora
Giltner
Hampton
Hordville
Marquette
Phillips

Cities in Harlan County, NE
Alma
Orleans
Ragan
Republican City
Stamford

Cities in Hayes County, NE
Hayes Center

Cities in Hitchcock County, NE
Culbertson
Palisade
Stratton
Trenton

Cities in Holt County, NE
Amelia
Atkinson
Chambers
Emmet
Ewing
Inman
Oneill
Page
Stuart

Cities in Howard County, NE
Boelus
Dannebrog
Elba
Farwell
Saint Libory
Saint Paul

Cities in Jefferson County, NE
Daykin
Diller
Endicott
Fairbury
Jansen
Plymouth
Steele City

Cities in Johnson County, NE
Cook
Crab Orchard
Elk Creek
Sterling
Tecumseh

Cities in Kearney County, NE
Axtell
Heartwell
Minden
Wilcox

Cities in Keya Paha County, NE
Mills
Newport
Springview

Cities in Knox County, NE
Bloomfield
Center
Creighton
Crofton
Niobrara
Verdigre
Wausa
Winnetoon

Cities in Lancaster County, NE
Bennet
Davey
Denton
Firth
Hallam
Hickman
Lincoln
Malcolm
Martell
Panama
Raymond
Roca
Sprague
Walton
Waverly

Cities in Lincoln County, NE
Brady
Dickens
Hershey
Maxwell
North Platte
Sutherland
Wallace
Wellfleet

Cities in Logan County, NE
Stapleton

Cities in Loup County, NE
Taylor

Cities in Madison County, NE
Battle Creek
Madison
Meadow Grove
Newman Grove
Norfolk
Tilden

Cities in Merrick County, NE
Archer
Central City
Chapman
Clarks
Palmer
Silver Creek

Cities in Nance County, NE
Fullerton
Genoa

Cities in Nemaha County, NE
Auburn
Brock
Brownville
Johnson
Julian
Nemaha
Peru

Cities in Nuckolls County, NE
Hardy
Lawrence
Nelson
Oak
Ruskin
Superior

Cities in Otoe County, NE
Burr
Douglas
Dunbar
Lorton
Nebraska City
Otoe
Palmyra
Syracuse
Talmage
Unadilla

Cities in Pawnee County, NE
Burchard
Du Bois
Lewiston
Pawnee City
Steinauer
Table Rock

Cities in Phelps County, NE
Atlanta
Bertrand
Funk
Holdrege
Loomis

Cities in Pierce County, NE
Hadar
Mclean
Osmond
Pierce
Plainview

Cities in Platte County, NE
Columbus
Creston
Duncan
Humphrey
Lindsay
Monroe
Platte Center

Cities in Polk County, NE
Osceola
Polk
Shelby
Stromsburg

Cities in Red Willow County, NE
Bartley
Danbury
Indianola
Lebanon
Mc Cook

Cities in Richardson County, NE
Dawson
Falls City
Humboldt
Rulo
Salem
Shubert
Stella
Verdon

Cities in Rock County, NE
Bassett

Cities in Saline County, NE
Crete
De Witt
Dorchester
Friend
Swanton
Tobias
Western
Wilber

Cities in Sarpy County, NE
Bellevue
Gretna
La Vista
Offutt Afb
Omaha
Papillion
Springfield
St Columbans

Cities in Saunders County, NE
Ashland
Cedar Bluffs
Ceresco
Colon
Ithaca
Malmo
Mead
Memphis
Morse Bluff
Prague
Valparaiso
Wahoo
Weston
Yutan

Cities in Seward County, NE
Beaver Crossing
Bee
Cordova
Garland
Goehner
Milford
Pleasant Dale
Seward
Staplehurst
Utica

Cities in Sherman County, NE
Ashton
Hazard
Litchfield
Loup City
Rockville

Cities in Stanton County, NE
Pilger
Stanton

Cities in Thayer County, NE
Alexandria
Belvidere
Bruning
Byron
Carleton
Chester
Davenport
Deshler
Gilead
Hebron
Hubbell
Reynolds

Cities in Thomas County, NE
Halsey
Seneca
Thedford

Cities in Thurston County, NE
Macy
Pender
Rosalie
Thurston
Walthill
Winnebago

Cities in Valley County, NE
Arcadia
Elyria
North Loup
Ord

Cities in Washington County, NE
Arlington
Blair
Fort Calhoun
Herman
Kennard
Washington

Cities in Wayne County, NE
Carroll
Hoskins
Wayne
Winside

Cities in Webster County, NE
Bladen
Blue Hill
Guide Rock
Inavale
Red Cloud

Cities in Wheeler County, NE
Bartlett
Ericson

Cities in York County, NE
Benedict
Bradshaw
Gresham
Henderson
Mc Cool Junction
Waco
York

Our Locations:

Thrasher Commercial
12330 Cary Circle
La Vista, NE 68128
1-402-685-2739

Commercial Push Pier Systems in Nebraska, Iowa, Missouri

Foundation Underpinning Services

The FSI Push Pier System utilizes high-strength round steel tubes and a load transfer bracket (retrofit foundation repair bracket) to stabilize and/or lift sinking or settling foundations. The foundation bracket is secured against the existing footing and pier sections are driven hydraulically through the foundation bracket and into the soil below using the combined structural weight and any contributory soil load as resistance. Pier sections are continuously driven until a suitable load-bearing stratum is encountered. At that point, the structure either begins to lift or the target pressure/load is achieved. The weight of the structure is then transferred from the unstable soil, to the foundation brackets, through the piers, and to firm load-bearing soil or bedrock.

The FSI Push Pier System develops a factor of safety against pier settlement by the pier installation methods used and the sequence with which multiple piers are driven and then re-loaded. Piers are first driven individually using the maximum weight of the structure and any contributory soil load. After all of the piers are driven, the piers are re-loaded simultaneously, and the total reaction load is distributed over the multiple pier locations. Since the average load on each pier during the load transfer operation is less than the load during pier installation/driving, a factor of safety against settlement is achieved. Typical factors of safety against pier settlement range from about 1.5 to 3.0, with higher values generally achieved for structures with greater rigidity. These factors of safety conservatively ignore any additional long-term frictional component to the pier's capacity (see below for more information).

Foundation Supportworks Model 288 Pier System Specifications

  • Bracket: Weldment manufactured from 0.25", 0.375", and 0.50"-thick steel plate. Yield strength = 36 ksi (min.), tensile strength = 58 ksi (min.).
  • External Sleeve: 3.50" OD x 0.216" wall x 30" or 48" long with sleeve collar welded to one end. Yield strength = 50 ksi (min.), tensile strength = 62 ksi (min.).
  • Pier Starter Tube: 2.875" OD x 0.165" wall x 50" long, triple-coated in-line galvanized. Yield strength = 50 ksi (min.), tensile strength = 55 ksi (min.). 3.375" OD x 0.188" wall x 1" long friction reducing collar welded to one end.
  • Pier Tube: 2.875" OD x 0.165" wall x 36" long, triple-coated in-line galvanized. Yield strength = 50 ksi (min.), tensile strength = 55 ksi (min.). 2.50" OD x 0.180" wall x 6" long internal coupler at one end with 3" extending out of pier tube.
  • Pier Cap: 5.0" wide x 9.0" long x 1" thick plate with confining ring welded to one side. Yield strength = 50 ksi (min.), tensile strength = 65 ksi (min.).
  • All-Thread Rod: 0.75" diameter x 16" long, zinc plated, Grade B7, tensile strength = 125 ksi [min.].

-- View Our Push Pier System Product Specifications document --

Foundation Supportworks Model 288 Capacity Summary

Soil Strength Parameters(2)

Allowable System Capacity(1,2,3,4,5) (kips)

Allowable System Capacity(1,2,3,4,5) (kips)

Soil Type

Consistency/
Relative Denisty

SPT, N-Value

Cohesion (psf)

Friction Angle (degrees)

48" Ext. Sleeve

30" Ext. Sleeve

Clay

Very Soft

< 2

< 250

-

23.5

19.2

Clay

Soft

2-3

250-500

- 27.0

21.5

Clay

Medium Stiff

4-7

501-1,000

-

32.0

23.9

Clay

Stiff

8-15

1,001-2,000

-

34.5

26.9

Clay

Very Stiff

16-31

2,001-4,000

-

34.5

30.8

Sand

Very Loose

< 3

-

26-30

33.0

24.2

Sand

Loose

4-9

-

28-34

33.0

24.2

Sand

Medium

10-29

-

30-36

34.0

26.3

Sand

Dense

30-39

-

34-40

34.5

27.2

(1) ‐ Retrofit brackets shall be used for support of structures that are considered to be fixed from translation. Structures that are not fixed from translation shall be braced in some other manner prior to installing retrofit bracket systems.

(2) ‐ Allowable capacities are based on continuous lateral soil confinement in soils with SPT blow counts as listed. Piles with exposed unbraced lengths or piles placed in fluid soils should be evaluated on a case by case basis by the project

(3) ‐ Allowable capacities consider a loss in steel thickness doe to corrosion. Scheduled thickness losses are for a period of 50 years and are in accordance with ICC‐ES AC358.

(4) ‐ Allowable capacities assume a concrete footing with a minimum compressive strength (f'c) = 2,500 psi.

(5) ‐ Allowable capacities with FS350BV retrofit bracket.

-- View Our Push Pier System Product Specifications document --

Foundation Supportworks Model 350 Pier System Specifications

  • Bracket: Weldment manufactured from 0.38”, 0.50”, and 0.63” thick steel plate, Yield strength = 36 ksi (min.), tensile strength = 58 ksi (min.).
  • External Sleeve: Ø4.000” x 0.226” wall x 48” long with sleeve collar welded to one end. Yield strength = 50 ksi (min.), tensile strength = 62 ksi (min.).
  • Pier Starter Tube:Ø3.500” x 0.165” wall x 50” long, triple-coated in-line galvanized. Yield strength = 50 ksi (min.), tensile strength = 55 ksi (min.). Ø4.000” x 0.226” wall x 1” long friction reducing collar welded to one end.
  • Pier Tube: Ø3.500” x 0.165” wall x 36” long, triple-coated in-line galvanized. Yield strength = 50 ksi (min.), tensile strength = 55 ksi (min.). Ø3.125” x 0.180” wall x 6” long internal coupler at one end with 3” extending out of pier tube.
  • Pier Cap: 4.00” wide x 8.50” long x 1.25” thick plate with pier locator plate welded to one side. Yield strength = 50 ksi (min.), tensile strength = 65 ksi (min.).
  • All-Thread Rod: Ø7/8” x 18” long, zinc plated. Grade B7, tensile strength = 125 ksi (min.).

-- View Our Push Pier System Product Specifications document --

Foundation Supportworks Model 350 Capacity Summary

Soil Strength Parameters(2)

Allowable System Capacity (1,2,3,4,5) (kips)

Soil Type

Consistency/Relative Density

SPT, N-value (blows/ft)

Cohesion (psf)

Friction Angle (degrees)

Clay

Very Soft

< 2

< 250

-

32.5

Clay

Soft

2-3

250-500

- 36.5

Clay

Medium Stiff

4-7

501-1,000

-

41.5

Clay

Stiff

8-15

1,001-2,000

-

43.5

Clay

Very Stiff

16-31

2,001-4,000

-

43.5

Sand

Very Loose

< 3

-

26-30

43.5

Sand

Loose

4-9

-

28-34

43.5

Sand

Medium

10-29

-

30-36

44.0

Sand

Dense

30-39

-

34-40

44.0

(1) ‐ Retrofit brackets shall be used for support of structures that are considered to be fixed from translation. Structures that are not fixed from translation shall be braced in some other manner prior to installing retrofit bracket systems.

(2) ‐ Allowable capacities are based on continuous lateral soil confinement in soils with SPT blow counts as listed. Piles with exposed unbraced lengths or piles placed in fluid soils should be evaluated on a case by case basis by the project

(3) ‐ Allowable capacities consider a loss in steel thickness doe to corrosion. Scheduled thickness losses are for a period of 50 years and are in accordance with ICC‐ES AC358.

(4) ‐ Allowable capacities assume a concrete footing with a minimum compressive strength (f'c) = 2,500 psi.

(5) ‐ Allowable capacities with FS350BV retrofit bracket.

-- View Our Push Pier System Product Specifications document --

Foundation Supportworks Model 400 Pier System Specifications

  • Bracket: Weldment manufactured from steel plates with integrated pipe sleeve. Steel plate: 0.38” and 0.50” thick steel plate, yield strength = 36 ksi (min.), tensile strength = 58 ksi (min.). Pipe sleeve: Ø4.50” x 0.237” wall x 14.50” long. ASTM A53 Grade B Type E & S, yield strength = 35 ksi (min.), tensile strength = 60 ksi (min.).
  • Pier Starter Tube:Ø4.00” x 0.226” wall x 36” long. ASTM A500 Grade B or C, yield strength = 50 ksi (min.), tensile strength = 62 ksi (min.). Ø4.50” x 0.237” wall x 1” long friction reducing collar welded to one end.
  • Pier Tube:Ø4.00” x 0.226” wall x 36” long. ASTM A500 Grade B or C, yield strength = 50 ksi (min.), tensile strength = 62 ksi (min.). Ø3.50” x 0.216” wall x 8” long internal coupler at one end with 4” extending out of pier tube.
  • Pier Cap: 4.00” wide x 8.50” long x 1.25” thick plate with pier locator plate welded to one side. ASTM A572 Grade 50, yield strength = 50 ksi (min.), tensile strength = 65 ksi (min.). All-Thread Rod: Ø0.875” x 18” long, zinc plated. ASTM A193 Grade B7, tensile strength = 125 ksi (min.).

-- View Our Push Pier System Product Specifications document --

Foundation Supportworks Model 400 Capacity Summary

Allowable System Capacity: 39,000 lbs. (with FS400BV Bracket)

Notes:

1.Retrofit brackets shall be used for support of structures that are considered to be fixed from translation. Structures that are not fixed from translation shall be braced in some other manner prior to installing retrofit bracket systems.

2.Concrete bearing assumes a minimum compressive strength (f’c) of 2,500 psi. Local concrete bending and other local design checks should be evaluated on a case by case basis by the project engineer.

3.Mechanical capacity is based on continuous lateral soil confinement in soils with SPT blow counts ≥ 4. Piles with exposed unbraced lengths or piles placed in weaker or fluid soils should be evaluated on a case by case basis by the project engineer.

-- View Our Push Pier System Product Specifications document --

Design Considerations

Push piers are installed directly adjacent to the existing structure utilizing side-load brackets. This introduces eccentricity into the system. The Model 288 Push Pier System incorporates an external sleeve at the top of the pier to aid in resisting the bending forces generated by this loading condition. This helps preserve the axial compressive capacity of the pier shaft. The external sleeve extends through and below the foundation bracket to essentially create a bracket that is 48 inches tall.

The moment or bending force is localized within a relatively short distance below the bracket. Although the bending force is dissipated quickly by the pier bearing against the confining soil, it is significant and cannot be ignored. The depth or length of sleeve and pier over which the bending force dissipates is a function of the soil stiffness near the surface. The depth is greater in soft clay and loose sand, and less in stiff clay and dense sand. In soft or loose soils, a small portion of the bending force may be transferred to the pier below the sleeve, thereby reducing the pier's allowable axial compressive capacity. A modified, lower capacity system is also available with a shorter, 30-inch long sleeve for low headroom applications.

Friction Reducing Collar

The first pier section advanced into the ground includes a larger-diameter "friction reducing collar" welded to the lead end. This collar, being larger in diameter than the pier tube, effectively creates annular space around the pier as it is advanced through most clayey soils. In soft clay or clean sand and gravel, an annular space may only temporarily be created. However, the larger diameter collar causes soil disturbance or remolding to occur, which also significantly reduces frictional resistance on the outside surface of the pier during driving. The result is a driven pier that generates most of its capacity in end bearing. Over time, the soils surrounding the pier relax back into the annular space and against the pier shaft. This provides an additional frictional component to the pier's capacity. Even though this frictional capacity may be significant, it is conservatively ignored in the determination of the pier's factor of safety against pier settlement.