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Tunstall Engineering Group, 325 Thomson Park Drive, Cranberry Twp, PA 16066

© 2020 by Tunstall Engineering Group

Projects

Southern Beltway 
Services:
Steel Girder Erection Plan / Prestressed Beam Erection Plan / Longitudinal Jacking / Equipment Loading / Beam Bracing / Support Excavation / Lifting Beams / Rebar Lifting / Demolition / Drill Rig Ramps 
Client:
Golden Triangle / Abate Irwin / Trumbull Corporation / Walsh 
Owner:
The Pennsylvania Turnpike Commission 
Description:

TEG provided a variety of services for many different clients on the Southern Beltway project.  The U.S Route 22 to I-79 project consists of constructing 13 miles of new roadway under 9 construction sections.  A large portion of Section 55C1-1 was assisting Abate Irwin (AI) in developing the steel girder erection plan for 3 long multi-span steel girder bridges.  TEG worked with AI to integrate the use of a stiffening truss to eliminate the need for falsework towers during erection.  Another portion of that same section involved the erection of a 2-span prestressed concrete bridge.  TEG developed the erection plan for Golden Triangle to erect and brace the beams.  For Section 55A2, TEG assisted Trumbull Corporation in numerous support of excavation designs for the substructure construction among other engineering tasks. For Section 55C2-1, the I-79 over Southern Beltway section, TEG assisted Walsh Construction with a variety of tasks. Support of excavation designs included a Soil Nail wall supporting I-79, and a Soldier Pile and Lagging wall for new pier construction. TEG furnished a demolition plan for widening bridge SB289, and performed two analyses of existing bridges to carry articulated haulers. 

Koppel Bridge
Services:
Steel Girder Erection Plan / Barge Analysis / Longitudinal Jacking / Equipment Loading / Beam Bracing / Support Excavation / Lifting Beams / Truss Demolition 
Client:
Brayman Construction Corporation / Advantage Steel
Owner:
Pennsylvania Department of Transportation
Description:

TEG provided multiple services for the Koppel bridge replacement. The Koppel bridge is a 1200 ft long multiple span steel girder bridge crossing of the Beaver River. TEG provided the erection plan and calculations which included barge stability analysis for cranes lifting beams, falsework tower designs, and pier bracket falsework designs. For each of the approximately 300 ft spans, TEG analyzed the stability of the individual steel girders and the global system stability at all steps of the erection which prompted the use of a stiffening truss to prevent buckling. Additionally, TEG provided support of excavation and cofferdam design for substructure construction in the river. TEG also performed structural analysis of the existing truss for special construction loading conditions and for the truss demolition plan working around multiple railroads. 

The CSVT River Bridge near Harrisburg, Pennsylvania, was a complex civil engineering project where Pittsburghs Tunstall Engineering applied their expertise to steel erectiin, spreader beams, and more.
CSVT River Bridge
Services:
Steel Girder Erection Plan / Pier Form Falsework Temporary Towers / Slope Stability Analysis Support of Excavation / Work Platforms / Spreader Beams
Client:
Trumbull Corporation / Century Steel Erectors
Owner:
Pennsylvania Department of Transportation
Description:

TEG provided a wide variety of services for the CSVT project. Most our involvement was on the CSVT River Bridge, which is a 15 span 4545’ long steel multi-girder bridge over the Susquehanna River in Union/Northumberland Counties north of Harrisburg, PA. TEG provided Century Steel with the steel girder erection plans and calculations. With pier heights near 200’ and spans as long as 350’, the erection required multiple finite element models to verify stability, stresses, and to design temporary lateral bracing. Towers up to 85’ tall, Work Platforms, and Spreader Beams were also designed for the project.

Shaler Street Bridge Replacement
Services:
SPMT Move Engineer of Record 
Alternate Design for Abutment 1 and modifications to Pier, Abutment 2, and Soldier Pile Wingwall 
Client:
Swank Construction Company / Mammoet
Owner:
Pennsylvania Department of Transportation 
Description:

TEG provided Alternate Design services to Swank for the 2 span bridge replacement on Shaler Street in the West End of Pittsburgh, PA. The Alternate Design entailed re-designing Abutment 1 to a 20+ foot tall abutment, modifying the soldier pile and lagging wingwalls, and modifying the multi-column Pier & Abutment 2 to cast-in-place which eliminated precast elements while maintaining the ABC schedule. TEG also was the Engineer of Record for the SPMT move which required moving both spans hundreds of feet to their final position. The weight of each move was over 330 tons including the superstructure and grillage system. 

Louisville City Football Club 
(LCFC Stadium)
Services:
Steel Girder Erection Plan / Erection Analysis / Permanent Connection Design / Temporary Connection Design / Temporary Bracing Design  
Client:
Ben Hur Construction 
Owner:
Louisville City Stadium 
Description:

The new $65 Million soccer stadium in Louisville, Kentucky will have a seating capacity of 14,000 when it opens in 2020.  The structure is horseshoe shaped and is comprised of steel raker beams, steel columns, and a curved cantilever roof portion.  TEG provided multiple services for the new LCFC Soccer Stadium, including performing designs for both temporary and permanent connections of the light rod to cantilever roof beam.  TEG also performed stability analysis and temporary bracing designs to aid in the steel erection. 

Pennsylvania P3 Rapid Bridge Replacement Project
Services:
Bridge Demolition and Support of Excavation Design
Client:
Walsh Group
Owner:
Pennsylvania Department of Transportation​
Description:

TEG is providing bridge demolition plans and temporary support of excavation designs to Walsh Group on the PA Rapid Bridge Replacement Project. The bridges consist of single and multi-span structures located across Pennsylvania. Support of excavation included stage line shoring, support of utilities during construction, and cofferdams for in-stream construction.

Link to Videos:
PTC Mainline Bridge WB-224B Lateral Slide
Services:
Lateral Slide System Design, Bridge Demolition Plan, Girder Erection Plan, Temporary Falsework and Foundation Design
Client:
Brayman Construction Corporation and Advantage Steel
Owner:
The Pennsylvania Turnpike Commission
 
Description:

New Bridge WB-224B is a two span steel multi-girder structure that replaced an existing two span adjacent box beam bridge.  The bridge consists of two side-by-side structures.  Tunstall Engineering Group provided engineering support to the contractor and steel erector for the bridge replacement.  The new bridges were built adjacent to the existing bridges.  Over a weekend closure, the existing bridges were demolished and the new bridges slid into place.  The lateral jacking system was designed specifically for this project and allowed jacking the structure into position with minimal manual adjustments.

Andy Warhol (7th Street) Bridge Rehabilitation
Services:
Deck Demolition Procedure, Tie Girder Temporary Tiedown Design, Jacking Procedures
Client:
Brayman Construction Corporation and Advantage Steel
Owner:
The County of Allegheny
 
Description:

Tunstall Engineering Group provided engineering support to the contractor and steel erector for the rehabilitation of this suspension bridge over the Allegheny River in Pittsburgh, PA.  The main structure consists of three spans, a 442 foot main span and 221 foot side spans.  The deck was removed and replaced.  Temporary anchorages were provided at each end of the bridge to resist uplift forces during construction.  Jacking procedures were provided for the approach spans and main bridge floorbeams.

Liberty Bridge Rehabilitation
Services:
Stringer Erection Procedures, Jacking Procedures
Client:
Abate Irwin, Inc
Owner:
The Pennsylvania Department of Transportation
 
Description:

Tunstall Engineering Group provided engineering support to the steel erector for the rehabilitation of this deck truss bridge over the Monongahela River in Pittsburgh, PA.  The Liberty Bridge consists of sixteen spans, with a 470 foot main span.  The rehabilitation consisted of replacing the deck, performing steel repairs, and painting the structure.  TEG provided stringer erection procedures and various jacking procedures to the steel erector.

Bluestone Dam - Phase 5
Services:
Walkway Design / Barge Loading Analysis / Barge Access Design / Swinger Crane Base Design / Railings and Tie-Off Points / Lifting Lugs and Plans / Wall Analysis 
Client:
Brayman Construction Corporation 
Owner:
The US Army Corps of Engineers – Huntington District 
Description:

The Bluestone Dam Phase 5 Project consisted of installing 5-36’ diameter cofferdams with transition sections between each and at the ends where it tied into the dam and spillway.  The cofferdams were then filled with tremie concrete, stone, and topped with a concrete cap.  Anchors were installed through the cofferdams and spillway monolith into rock below.  TEG assisted Brayman throughout the construction with many designs for access of personnel, materials, and equipment.  Many different types of equipment were loaded onto work barges to move around the site.  Each barge configuration required an analysis to ensure stability and that draft limits were maintained.  Walkways, stairs, railings, tie-off points, and egress platforms were all designed specifically for the site to allow workers easy access and safe working conditions.  Other designs included a site specific swinger crane base mounted on work barges, analysis of the training wall for crane loading while moving materials and equipment onto the work barges, lifting lugs which were mounted to large sections of concrete being removed, and many other engineering requests from Brayman. 

Greenfield Bridge
Services:
Bridge Demolition Plan
Client:
Mosites Construction Company
Owner:
City of Pittsburgh
 
Description:

The project consisted of providing engineering support to the contractor for the demolition of the concrete arch bridge over the Parkway East.  A 3D model of the concrete arch, spandrel columns, and floor system was created to analyze the structure for each stage of removal.  Pre-cuts were examined to ensure the structure remained stable prior to blasting.

Jonathan Hulton Bridge
Services:
Bridge Demolition Plan
Client:
Brayman Construction Company and Advantage Steel and Construction
Owner:
Pennsylvania Department of Transportation
 
Description:

The project consisted of providing engineering support to the contractor for the demolition of the 5 span steel truss bridge over the Allegheny River.  The existing truss bridge was examined for construction loading during each stage of demolition.  Span 5 over the railroad was picked in pieces using cranes and falsework towers.  The Span 5 truss was examined for each stage as pieces were removed from the span.  Temporary strengthening members were added to the truss at the towers.

 
 
 
 
 
 
 
 
 
 
 
 
 
Norfolk Southern RR Bridge over Federal Street
Services:
Bridge Demolition Plan / Bridge Erection Plan / Support of Excavation Design
Client:
Trumbull Corporation and Century Steel Erectors
Owner:
Norfolk Southern Railroad
 
Description:

The project consisted of providing engineering support to the contractor and steel erector for the replacement of the railroad bridge over Federal Street on Pittsburgh’s North Shore.  A demolition plan was provided to the contractor for removal of the existing girders and floorsystem.  Temporary excavation support was required between each phase of construction.  TEG performed the temporary excavation support design for the contractor.  TEG also provided the steel girder and floor system erection procedure for the steel erector.

Parkway West Jacking
Services:
Bridge Jacking Plans
Client:
Century Steel Erectors
Owner:
Pennsylvania Department of Transportation
 
Description:

The project consisted of providing engineering support to the steel erector for the jacking of a dozen bridges on the Parkway West in Pittsburgh, PA.  The bridges ranged between single spans and nine spans in length.  The jacking methods consisted of jacking from the beam seats, jacking using temporary or existing diaphragms, and jacking using pier brackets.  In addition, several bridges were analyzed for crane loading when cranes were placed on existing bridges for girder removal and erection.