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LARRY G. MRAZEK, P.E., S.E.
LGM Engineers, LLC
260 Heather Crest Drive
Chesterfield, MO 63017
314-469-4565 phone •
314-469-3331 fax
[email protected]


REGISTRATIONS

* Registered Professional Engineer, Missouri.
* Registered Professional Engineer, Wisconsin.
* Registered Civil Engineer, California.
* Registered Structural Engineer, Illinois.

EDUCATION

* M.S., Civil Engineering, 1957, University of Missouri – Columbia
* B.S., Civil Engineering, 1955, Washington University - St. Louis

WORK EXPERIENCE

LGM ENGINEERS, LLC, St. Louis, MO
1998 - present
Owner

Provide structural engineering support and services. Projects completed are listed below.

Condition Survey and Structural Investigation

This investigation was limited to warehouse areas where heavy coils of aluminum foil were stored and where fork-lift trucks operated. Plant personnel had noticed floor cracks and actual floor deflections during the operation of fork-lift trucks. Plant personnel also noticed concrete spalling from the ceiling.

Ceilings were sounded and floors chain-dragged. Both floor and ceiling cracks were mapped. ANCO Testing Laboratory extracted several cores for petrographic examination, and also assisted LGM Engineers to determine the spacing and sizes of reinforcement.

The Owner did not have original structural drawings. However, base type drawings were available for endorsing bay sizes, slab thicknesses, etc.

A letter report with recommendations for strengthening and repairing the subject floor was prepared and issued to the Owner. The report included selected photographs and test data.

Repair Documents and Construction Surveillance for Expansion Joint Deterioration at Parking Structure
The expansion joint in the exposed deck of the parking structure was seen to be spalling and cracking, with some visual deflection. Provision for structure movement was questionable. LGM Engineers completed field measurements and computed the capacity of the slab for code specified loadings. Repair sketches and specifications were developed and implemented in the field. LGM Engineers furnished field supervision during repairs.

Condition Survey, Report and Repair Documents - Parking Structure: (Included Two Field Surveys)
This project included the field surveying and sounding of concrete surfaces. Repair drawings were prepared. Information from an earlier survey was updated and additional testing was accomplished. A structural analysis was completed to verify the capability of the structure to support code specified loadings with one slab tendon broken. A final report was completed which included photographs, test data, a budget cost estimate and recommendations.

Completed repair documents and assisted client in selection of a contractor after bidding. Provided on-site surveillance of repairs, developed a "punch list" for repairs, and assisted in completing "Record Repair Documents.

Repairs of Level 1 (Northwest Area) Subsurface Garage
Sounded ceiling and floor areas and determined repair quantities. Using unit prices furnished by the Contractor, LGM Engineers determined a budget cost estimate for repairs. The reason for selection of LGM Engineers for completion of this work was that there were no repair documents and the original bid price had almost doubled. Provided construction surveillance during repairs, including the evaluation of the condition of unbonded tendons. Completed structural calculations to determine the extent of necessary tendon replacement & repairs.

Condition Survey, Report and Repair Drawings - Subsurface Garage
In addition to the condition survey report, services included the preparation of repair documents and field surveillance.

Condition Survey and Testing of Parking Structure
This one-way pan joist structural system was found to be in poor condition, requiring considerable repairs. For safety concerns, during the field survey, LGM Engineers advised the Owner to shore specific joists and to prohibit parking in certain areas. Provided the Owner with a report, including drawings and a budget cost estimate for recommended repairs.

Repairs to Parking Structure
Updated repair quantities from earlier condition survey. Completed repair drawings. Completed technical and front-end specifications, including "Bid Form" with unit price and lump sum items. Organized pre-bid meeting and walk-thru with bidders. Evaluated bids. Provided periodic site visits and inspections, including considerable time during concrete pours. Completed and issued field changes, sketches and field reports. Attended meetings during repairs, as well as the final "punch list" check and walk-thru with owner's representatives.

Condition Survey, Report - Parking Structure
Completed Condition Survey Drawings, sounded concrete surfaces, mapped cracks and supervised the extraction of test samples. LGM Engineers investigated unbonded slab tendons at selected locations. Photographs were taken and a budget cost estimate completed. A structural analysis was completed to determine the capability of the structure to support code specified loadings.

A report was issued to the Owner. The report included drawings, photographs, a budget cost estimate and recommendations for repairs.

SVERDRUP, INC., St. Louis, MO

Updated Condition Survey, Report - The Miller Brewing Company Corporate Parking Structure - Sverdrup Facilities
Using copies of record repair documents, engineers spot-sounded ceiling areas and noted the condition of the traffic membrane. Photographs were taken and a report provided to the Owner. Prior to leaving the site, LGM Engineers and Sverdup engineers conducted a brief walk-thru of the garage with Miller personnel, noting deficiencies found in the survey.

JACOBS ENGINEERING, St. Louis, MO

Condition Survey, Report - Cement Mill Foundation Cracking
Made trip to Kansas City with Jacobs project structural engineer. Accessed cracks from a lift vehicle, operated by the contractor's personnel. Mapped and measured crack widths. Evaluated the mass foundation for restraint cracking, using guidelines described in ACI 224 and ACI 207. Provided Jacobs with a report and a specification for repairing cracks.

METROPOLITAN SEWER DISTRICT, St. Louis, MO

Investigation of Cracking and Leakage of Digester Tanks at Missouri River Wastewater Treatment Plant
LGM Engineers provided consulting services to Jacobs Engineering. A field survey was conducted as was specific testing. A condition survey report and repair documents were completed.

Investigation of Slab-On-Grade Cracking for New Prison Addition.
This project was completed for the State of Missouri. Services included plan & field report reviews, as well as crack measuring and sounding of slab surfaces. The investigation involved two trips, the latter during concrete placement. Meetings were held with state engineers, the contractor and the design engineer. A report with photographs, results of testing and recommendations was presented to the owner.

North Terminal
This project included the design of a hazardous waste containment area around existing storage tanks. Drawings and specifications were completed and LGM Engineers directed land surveying of the site.

RELATED WORK EXPERIENCE

ENVIRONMENTAL

CITY OF SPRINGFIELD, Springfield, MO
Southwest Wastewater Treatment Plant Additions
Structural Engineer-Of-Record

This project was most unique in that it provided tertiary treatment to wastewater from the Southwest plant, incorporating oxygenation tanks in the process and ozonation tanks for disinfection. This project led to the testing and research contained in the paper referenced under “Publications and Presentations.” Non-liquid containing structures housing electrical and process equipment incorporated precast, prestressed concrete double tee roof units. Hollow core precast concrete roof units were specified for the office and maintenance buildings. Rock excavation and perched water tables added to the difficulty of both design and construction.

Northwest Wastewater Treatment Plant Additions

Structural Engineer-Of-Record

This project involved a large holding basin founded directly on rock; resistance to uplift/floatation was accomplished using rock anchors.

METROPOLITAN SEWER DISTRICT, St. Louis, MO

Bissell Point Wastewater Treatment Plant Additions

Structural Engineer-Of-Record

This $250 million project included the design and construction of several large contracts.

* A new effluent pump station with conduits and junction structures, all of reinforced concrete construction and supported on pile foundations.
* Trickling Filter Towers were designed using a sitecast/tiltup concept. There were many innovations involved in both the preliminary and final design. The structures were designed to resist earthquake forces as well as the capability to accept a dome cover; this addition was implemented early in the life of the facility, in order to reduce the odor problems experienced with the initial open top filters. A unique precast concrete filter media support system was developed this concept improved the early completion of the project and afforded added stability. (See “Publications and Presentations”)
* Modifications were made to the existing effluent pump station to accommodate a turbine generator. This pump became the backup for the new effluent pump station.
* Condition survey and repairs of the primary and preparatory structures of the existing plant. Services included assistance to the resident engineer during repairs.

Missouri River Wastewater Treatment Plant

Structural Engineer-Of-Record

This project was completed for MSD and included a new 28 mgd. plant, designed and constructed in three phases. The process included both primary and secondary treatment structures. Provision was made to dewater the tanks with protection from floatation during high groundwater levels. Construction was of reinforced concrete. Trickling Filter Towers were constructed using precast, prestressed concrete double tee units for the walls. A reinforced concrete ring beam at the top of the panels tied the precast elements together to help ensure structure stability and to resist specified seismic forces. This project consisted of various type tank structures, including both primary and secondary clarifier(circular) tanks, tunnels, an employee-maintenance building and both aerobic and anaerobic digesters. Special shaped digester tank bottoms required careful planning from both a design and construction standpoint.

These structures survived the 1993 flood. Membrane waterproofing in basements and tunnels was effective in preventing leakage into dry, work areas.

CITY OF COLUMBIA, Columbia, MO

Columbia, Missouri

Water Treatment Plant Expansion

Structural Engineer-Of-Record

This was an 8 mgd plant expansion with a two million gallon rectangular storage tank, partially above ground. The storage tank and connecting effluent pipes were designed for seismic forces and related displacements.

CITY OF GRANITE CITY, Granite City, IL

Wastewater Treatment Plant Upgrade

Structural Engineer-Of-Record

This project included $4 million in modifications to the 23 mgd wastewater treatment plant. Included was a new grit chamber with parshall flume, modifications to existing secondary tanks to accommodate a new sludge collection system, new filter press foundations, a new laboratory and a new grit building.

SVERDRUP CORPORATION, St. Louis, MO

$500,000 Stormwater Pump Station, St. Louis, MO

Structural Engineer-Of-Record

Riverport Industrial/Commercial Development in St. Louis County. This facility survived the 1993 flood and earned the "MASTER BUILDER'S AWARD", by Sverdrup Corp.

CONDITION SURVEYS - REPAIRS

BOATMEN’S BANK, St. Louis, MO

Boatmen's 4625 Lindell Parking Garage Repairs

Structural Engineer-Of-Record

This project included several condition surveys over a period of four years. Repairs were specified and construction surveillance was included in the services. The structure had both bonded and unbonded post-tensioned construction.

STATE OF MISSOURI, Jefferson City, MO

Circular Parking Structure Renovation, Jefferson City, MO

Structural Engineer-Of-Record

Capitol Complex, State of Missouri, Jefferson City. The project consisted of several condition surveys and repair documents for this five level circular garage of reinforced concrete construction.

JACOBS ENGINEERING, St. Louis, MO

Corporate Parking Structure - Miller Brewing Corp.

Structural Engineer-Of-Record

This project included a condition survey, repair documents and periodic site visits during construction. The garage included both bonded and unbonded post-tensioned construction. LGM Engineers continues to provide services to Jacobs Engineering (Sverdrup) regarding updated repairs to the structure.

CITY OF ST. CHARLES, St. Charles, MO

City Of St. Charles Water Treatment Plant Condition Survey

Worked with environmental engineers on a study of the City of St. Charles Water Treatment Plant, which involved completing an abbreviated condition survey of owner selected structures. Sounded concrete surfaces with a light hammer and completed several non- destructive tests(NDT) which included concrete pH, rebound hammer readings for compressive strength and crack width measurements. Summarized results of survey and completed recommendations for repairs. These conclusions and recommendations were included with the environmental assessments of the facility.

U. S. ARMY

Maintenance Facility at Fort Leonard Wood, MO

Structural Group Leader/Designer

Buildings were of structural steel framing with steel bar joists and tubular steel bracing. Roofs were metal deck, which acted as flexible diaphragms. HVAC was housed in structures within the steel building; these structures were of load-bearing, partially reinforced masonry with hollow core precast concrete roof units. Large bridge cranes and jib cranes were required. The slab-on-grade was designed for heavy military vehicles, including military tanks.

KEYSTONE PORTLAND CEMENT, Lehigh, PA

Keystone Portland Cement Plant Additions

Structural Group Leader/Designer

This project included the addition of a new kiln, burner building and modifications to an existing mill building. The new burner building was designed for a very heavy loading(500 psf); precast, pretensioned beams and girders with a cast-in-place concrete slab, composite with the precast members were specified. The owner required all concrete structures to be designed using the STRENGTH DESIGN METHOD(Ultimate Strength Design). At that time, ultimate strength design was included only in the appendix to ACI 318; i.e., working stress design(WSD) was the design method of choice. My graduate work at Missouri U. helped greatly during this change in design methods. I also served as resident engineer on site with another engineer from Bendy Engineering Co.

JEFFERSON COUNTY, MISSOURI

Investigation of Jefferson County High School

Structural Group Leader/Designer

This project involved a field visit to the construction site and review of PLANS. The reason for the initial inquiry by a law firm was the tilting of a relatively high basement wall. Our review led to many other questionable details and lack of defined load paths. The review resulted in a letter to the Owner with recommendations.

CITY OF GRAND RAPIDS, Grand Rapids, MI

Lake Michigan Filtration Plant
Expert Witness Testimony

Initially the design services were limited to providing a condition survey of the 1992 additions. Later, Sverdrup was engaged to provide expert witness testimony for litigation involving nonĀ­-performance of the newer addition. This required another condition survey with independent testing. The case was settled out of court for the City.

We also provided limited repair details for the older Accelator tanks and newer conduits. Repairs included soil stabilization using cement and chemical grouting and polyurethane grout injection of cracks and joints, as well as the installation of new internal expansion joints. Field supervision was provided during this work.

PUBLICATIONS AND PRESENTATIONS

o Resistance of Concrete Structures to Ozone", Concrete International, April 1981.
o Coauthor, Chapter 2-3 - CONCRETE, "Standard Handbook of PLANT ENGINEERING.”
o Coauthor, "Perspectives on Environmental Engineering Structures", under REPAIR PERSPECTIVES, CONCRETE REPAIR DIGEST, February/March 1997.
o "What is the Maximum Crack Width to Prevent Leakage,” presented at the Technical Session / ACI 224 at the ACI convention, March 2000, San Diego, California. Published in "ACI SP 204.”
o "The Innovative Design and Construction of Trickling Filter Towers", presented in Dundee, Scotland, June 1996, International Conference on "Concrete In The Service of Mankind", published in one of four texts from the conference.

AFFILIATIONS

o Fellow, American Society of Civil Engineers(ASCE), LIfe Member, 1998.
o Member - American Concrete Institute(ACI).
o Voting Member, ACI Committee 350, "Environmental Engineering Concrete Structures."
o Voting Member, ACI Committee 121, "Quality Assurance in Concrete Construction."
o Associate Member, ACI Committee 546, "Concrete Repairs.”
o Member, Precast, Prestressed Concrete Institute(PCI).
o Member, International Concrete Repair Institute (ICRI).
o Member, Concrete Reinforcing Steel Institute(CRSI).
o Member, Engineers Club of St. Louis
o Elected to "Civil Engineering Academy of Distinguished Alumni,” University of Missouri - Columbia

ADDITIONAL TRAINING

Seminars and short courses on structural steel design, concrete design, masonry design, prestressed concrete design, value engineering, seismic design and the design of environmental engineering structures.