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Design and Implementation of a Cable Storage Rack at Norfolk Naval Shipyard

This project aims to design a storage rack for various-sized spools of expensive power cables at Norfolk Naval Shipyard. Currently, cable spools are stored on the ground, leading to damage from environmental factors and creating safety hazards. Our solution involves a rack system that ensures organized, safe storage while being forklift-accessible. The design specifications include a stable structure capable of withstanding harsh weather conditions, maximizing space utilization with a two-level system, and facilitating easy loading and unloading.

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Design and Implementation of a Cable Storage Rack at Norfolk Naval Shipyard

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  1. Norfolk Naval ShipyardCable Storage Rack Faculty Advisor: Dr. Han P. Bao Group Leader: Parker Harding Group Members: Christina Toroc Hunter Hughes Deborah C. McHugh

  2. Introduction “The goal of this project is to design a rack to store various sized spools that contain expensive power cables.” • Cables supply power to the ships • Cable spools are currently stored on the ground • They are getting damaged due to the sun, weather, & waterfront activity • Safety hazard • Disorganized • Spools in front are being used more than those in the back

  3. Design Parameters • Area 120’ x 84’ • Ground is relatively flat; an exception is where the drain is located • Maximum height forklift can handle 10-14 ft • Blades 8’x 8” wide x 3” thick, 25K Forklift 15’ long x 8’ wide

  4. Problem Definition • Racks need to be adaptable to different sized spools • Cables must be stored in the allotted area • Forklift will be used to load & unload the rack http://www.google.com/imgres?imgurl=http://chinadigitaltimes.net

  5. Cable & Spool Properties

  6. Grey & Yellow Spools

  7. Design Details • Constructed of structural steel I-beams & square tubing • Welded connections • 2 levels of storage available • Forklift accessible from both sides • First in-last out or first in first out spools picking, ensures all spools are utilized

  8. Forklift Attachment

  9. Single Unit Cell

  10. 2x2 Structure

  11. Side View of 2x2

  12. Environmental Protection • Warehouse Storage • Likely means of storage • Portable Building • Alternative means of storage • Polyolefin Covered Shelters • 5-8 yr lifetime expectancy • Bolted construction, to withstand up to 70 mph winds • Can be manufactured to withstand up to 110 mph winds • Flame retardant, UV, & mildew treated • 5 year pro-rated warranty http://1southerncomfortshelters.com/services.nxg

  13. Materials Required Cable Storage Rack:

  14. Forklift Blades Accessory:

  15. FEA – Bending Stress – Max: 6,720 psiFactor of Safety: (P) 5.36 (H) 5.80

  16. Connections

  17. FEA - Plate Stress - Max: 14,200 psiFactor of Safety: (P) 2.54

  18. FEA - Displacement - Max: .0695 in

  19. Material Analysis

  20. Labor Analysis

  21. Grand Total

  22. Gantt Chart

  23. References • "A992 Hot Rolled Wide Flange I-beam." OnlineMetalStore.com. N.p., 2011. Web. 23 Mar 2011. <http://www.onlinemetalstore.com/items/A992_Hot_Rolled_Steel_Wide_Flange_I_Beam.cfm?item_id=194&size_no=1>. • "American Standard Steel Channels." The Engineering Toolbox. The Engineering Toolbox, n.d. Web. 21 Mar 2011. <http://www.engineeringtoolbox.com/american-standard-steel-channels-d_1321.html>. • Budynas, Richard G., and J. Keith Nisbett. Shigley's Mechanical Engineering Design. 9th ed. New York, NY: McGraw-Hill, 2011. Print. • "Galvanized Steel Channel." OnlineMetalStore.com. N.p., 2011. Web. 23 Mar 2011. <http://www.onlinemetalstore.com/items/Galvanized_Steel_Channel.cfm?item_id=168&size_no=4>. • "Mechanical/Structural Steel Tubing." OnlineMetalStore.com. N.p., 2011. Web. 23 Mar 2011. <http://www.onlinemetalstore.com/items/Structural_Mechanical_Steel_Square_Tube.cfm?item_id=206&size_no=78>. • "Services." Southern Comfort Shelters. Southern Comfort Shelters, n.d. Web. 21 Mar 2011. <http://1southerncomfortshelters.com/services.nxg>. • "Structural Steel Tubing." Saginaw Pipe. Saginaw Pipe, n.d. Web. 21 Mar 2011. <http://www.saginawpipe.com/square_rectangular_tube.htm>. • "Wide Flange Steel Beams." Saginaw Pipe. Saginaw Pipe, n.d. Web. 21 Mar 2011. <http://www.saginawpipe.com/steel_i_beams.htm>.

  24. Questions?

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