Hello all, I'm a student at MTSU and was looking for help from industry professionals.  Any input would be grateful. Thank you in advance!

2016 Concrete Construction Competition Request for Proposals

Project Statement

This problem statement assumes you are one of the project engineers on a construction project during the bidding phase where 20,000 railroad crossties are to be installed on an elevated structure. The crossties are for refurbishing the roadbed and conversion of the mass transportation system to be fully automated, without locomotive or conductor service personnel on the train. Each crosstie has anchors to attach the tie to the supporting structure, rail-seat anchors, and service/utility anchors to support power and communications equipment. In total the following table shows the anchors that could be placed in each tie. However, special ties can be fabricated with reduced number of anchors if all ties are not identical.

Anchors to be embedded in each crosstie:

Anchor type

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Number required per tie

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Frequency of use

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Special requirements

Rail-seat anchors

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2 on each end

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Each tie

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Use standard rail seats

Attachment of tie to structure anchors

1 on each end

Each tie

Use through bolt with nut on top of tie

Power support anchors

4 on each end

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Every third tie

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Can be post- installed

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Third rail /communication anchors

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4 on each tie

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Every other tie

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Can be post- installed

The load on the anchors are as follows:

  1. Rail seat = 12,000 lbs tension & 3,000 lbs shear

  2. Through-bolt = 10,000 lbs

  3. Power support = 3,000 lbs tension each top anchor

  4. Communications = 900 lbs shear

  5. Third-rail = 1,500 lbs tension, 800 lbs shear

The National Transportation Safety Board (NTSB) and the Federal Railway Administration (FRA) have strict design requirements for unmanned transportation systems. They require that all attachments to the crosstie be considered critical and that the failure rate be less than 1 in 10 million. The service life of the crosstie is intended to be 50 years. In addition, the project is located in the state of Kentucky.

Version 1.3 of 2016 Concrete Construction Student Competition

As the project engineer in charge of providing cost feedback for the construction bid so that the probability of failure is less than 1 x 10-7, you must to determine:

  1. the tie manufacturer review requirements,

  2. the fabrication inspection requirements,

  3. the field inspection requirements, and

  4. the testing requirements for the anchors used with the tie system.

Additional Information

  1. Attached drawings of the cross-ties.

  2. You have access to the online Manual of Concrete Practice at www.concrete.org. Use the following log-in:

    Username: studentcomp

    Password: ConvStu16
    To get to the MCP Online, select the MCP Online under Publications. Be sure to download the Protected PDFs, and open in Adobe Reader or Adobe Acrobat. Use the license key M1378319.

  3. The most recent version of the 2013 Kentucky Building Code is the 4th Edition, dated June 22, 2016. Chapter 17 Special Inspections and Tests may be helpful. The code can be found at: http://dhbc.ky.gov/Documents/2013%20KBC%204th%20Edition%20(December%20201 5)%20-%206-22-2016.pdf

Format Requirements:

  1. Each submission shall include all four parts listed above.

  2. The analysis shall be clearly written with a maximum of 1000 words.

  3. Up to four (4) illustrations, graphs, charts, pictures, or spreadsheets may be included.

  4. Each submission, including any items from #3, must be in a single *.pdf file.

  5. No identifying information shall be included in the document, other than your assigned four

    digit team number.

  6. Submit the file as ####.pdf, where #### is your assigned four digit team number.

  7. The file should be submitted to Dr. Anthony J. Lamanna at anthony.lamanna@eku.edu by

    5:00 PM on November 18, 2016.

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Version 1.3 of 2016 Concrete Construction Student Competition

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1'

7'

4'-81" 2

3@6"

ANCHORS FOR THIRD RAIL COMMUNICATION

2"

8" 2"

ANCHOR TIE TO SUPPORT STRUCTURE

RAIL SEAT ANCHORS (INTERNALLY THREADED)

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11"

51" 61" 2 2

COMMUNICATION

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12"

POST-TENSIONING DUCT TO APPLY 1000PSI NOMINAL COMPRESSION ON CROSS-SECTION

ANCHORS TO SUPPORT POWER SUPPLY FOR TRAIN

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