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Structure Engineering 101 For Mechanical Engineers

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  1. Structure Engineering101For Mechanical Engineers

  2. Class outline • Structural systems • IBC 2006 Seismic provisions • Information your structural engineer needs • Coordination • Building Information Modeling

  3. Structural Systems • Foundations • Drilled piers and pier caps • Driven piles • Footings • Mat footings • Perimeter grade beams • Basement walls • Tie beams • Post-Tensioned slabs on grade

  4. Drilled pier video Yes I know the video is side ways….I am just a structural engineer…

  5. So what does a mechanical engineer need to know about a drilled pier? • Underground coordination • Top of pier elevation is critical • Trenches and excavations next to piers undermine piers capacity • Pier caps and tie beam coordination • Electrical grounding • Piers are bigger then shown on structural • Piers are not the ideal place to put the geo-exchange system….

  6. Driven piles

  7. Electrical Grounding Driven Pile

  8. Screw Piles

  9. Mat Foundations

  10. Foundation grade beam

  11. How do foundation problems effect the mechanical engineer? • Expansive soils • Soil settlement • Void forms • Crawl spaces and molds

  12. Void form

  13. Foundation heave/ settlements

  14. Structural Systems • Steel Frame • Beams and columns • Gussets • Acoustical • Vibration

  15. Slab thickness… see schedules and details Beam depth… see plan Camber… not to worry… Beam reactions… does not effect you Dimensions… not something a mechanical engineer uses…..

  16. Steel Beam Sizes • Link to steel section properties look up table: http://www.efunda.com/math/areas/RolledSteelBeamsW.cfm • Commonly used steel beam sizes: • Size Depth (d) Width (bf) • W10x19 10” 4” • W10x30 10” 6” • W12x22 12” 4” • W12x35 12” 7” • W14x26 14” 5” • W14x38 14” 7” • W14x53 14” 8” • W16x31 16” 6” • W16x57 16.5” 7” • W18x46 18” 6” • W18x70 18.5” 7 1/2” • W21x57 21” 6 1/2” • W21x68 21” 8 1/4” • W24x62 24” 7” • W24x84 24” 9” • W27x94 27” 10” • W30x99 30” 10 1/2” • W33x130 33” 11 ½” • W36x160 36” 12”

  17. Cutting the metal deck……

  18. Floor drains in the metal deck……

  19. Hydronic Heating

  20. Joists and joist Girders

  21. Structural Systems • Cast-in-place concrete frame • Wide beams center on columns Concrete slabs that generally can be readily sleeved for piping • Mechanical shafts and chases • Sleeves and floor sinks.. electrical conduits…

  22. Structural Systems • Cast-in-place concrete core walls • Avoid locating telecom and electrical rooms inside of closed in concrete core walls • Locate shafts at ends of cores • Coordination of openings • Mechanical ducts • Stair pressurization • Piping sleeves • Electrical conduits • Fire house cabinets • Recessed drinking fountains

  23. Do you make site visits duringstructural construction?Ask to go along with your structural engineer sometime… It is a lot of fun…check this video out

  24. Structural Systems • Post-tensioned Cast-in-place concrete • Most common on Residential and Hotels • Flat thin slab • Highly stressed cables embedded in slab • Sleeves around columns are critical to design • Drilled in hanger inserts limited to about 1 inch in depth. • Pipe sleeves by columns

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