Peb

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  • 1. PRE ENGINEERED BUILDINGS
    • Tailor made building based on client’s requirement & actual design calculations using tapered sections.
    • A combination of built up section, hot rolled section, cold formed elements and profiled sheets
    • Designing and casting is done in factory
    • Building components are brought to site
    • Then fixed/jointed at the site
    • All connections are bolted.
  • 2.
    • Steel was very expensive item in USA
    • The concept of PEB originate from here.
    • The idea was that section should be provided as per B.M.D.This lead to the saving in steel and development of PEB concept.
    BRIEF HISTORY
  • 3. CONT….
    • Industrial Building
    Parking lots Indoor Stadiums Railway Station
  • 4.
    • Aircraft Hangars
    Metro Station Wear house High rise Building
  • 5.
    • Self weight
    • 30% lighter
    • Primary Member is tapered section
    • Secondary members are light weight rolled framed “Z” and “C” section
    • Self weight
    • More heavy
    • Primary members are Hot rolled “I” section
    • Secondary members are “I” or “C” section which are heavy in weight.
  • 6.
    • Delivery – average 6 to 8 weeks
    • Foundation-simple design, easy to construct & light wt.
    • Erection cost and time- accurately known
    • Erection process is easy, fast, step by step
    • Delivery- average 20 to 26 weeks
    • Foundation- expensive, heavy foundation required.
    • Erection cost and time- 20% more than PEB
    • Erection process is slow and extensive field labor is required.
  • 7.
    • Seismic Resistance- low weight flexible frames offer higher resistance to seismic forces
    • Overall price -30%lower
    • architecture-achieved at low cast
    • Seismic Resistance- rigid heavy weight structures do not perform well in seismic zones
    • Overall price - Higher Price per square meter.
    • Architecture- achieved at higher cost
  • 8. COMPONENTS
    • Main Frame
      • Primary Members
        • Columns
        • Rafters
      • Secondary Members
        • Purlins
        • Girts
    • Sheeting
      • Roof
      • Wall
      • Fascias etc
    • Accessories
      • Ventilators
      • Sky Lights
      • Misc.
  • 9.  
  • 10. OTHER MAJOR COMPONENTS OF PEB CRANE BRACKETS & BEAMS MEZZANINE FLOORS STRUCTURAL PARTIONS FASCIAS CANOPIES
  • 11. DESIGN ISSUES
    • STRUCTURAL PLANNING
    • FRAME CONFIGURATIONS
    • TYPES OF LOADS & ASSESSMENT
    • END CONDITIONS
    • CRANES
    • MEZANINES
    • LOAD COMBINATIONS
  • 12. PRE-ENGINEERED BUILDINGS NOMENCLATURE – STANDARD FRAMING SYSTEMS TCCS = TAPERED COLUMN CLEAR SPAN TCMS-1 TAPERED COLUMN MULTI-SPAN WITH 1 INTERMEDIATE COLUMN .
  • 13. SSCS = SINGLE SLOPE CLEAR SPAN . SSMS-1= SINGLE SLOPE MULTI-SPAN WITH 1 INTERMEDIATE COLUMN
  • 14. GUIDELINES FOR PEB DESIGN AT PROPOSAL STAGE
    • ALL DESIGNS SHALL BE AS PER MBMA AMERICAN STANDARDS UNLESS CLIENT SPECIFIES AS PER IS CODE
    • LIVE LOAD AS PER AMERICAN CODE = 0.57 KN/M^2  AND AS PER IS CODE = 0.75 KN/M^2. (REDUCTION IN LIVE LOAD TO BE INCORPORATED FOR BUILDINGS HAVING HIGHER SLOPES)
    • AS PER AMERICAN CODE :HORIZONTAL DEFLECTION = L/180 & VERTICAL DEFLECTION=Eh/100 FOR MAIN FRAMES.
    • WIND TERRAIN CATEGORY 3 IS TO BE SELECTED UNLESS MORE DATA IS AVAILABLE.
  • 15. CONTD……
    • IN AMERICAN DESIGN , WIND COEFFICIENTS TO BE FOLLOWED AS GIVEN IN MBMA.
    • IN IS DESIGN, INTERNAL & EXTERNAL BUILDING WIND COEFFICIENTS AS PER IS -875 (PART-3).
    • GENERALLY BUILDINGS ARE TO BE DESIGNED AS PINNED EXCEPT FOR BUILDING SPAN >30M OR CRANE CAPACITY OF MORE THAN 5 TONS OR HEIGHT GREATER THAN 9 M
    • STANDARD PURLIN LAPS SHOULD BE 385 mm
  • 16. Optimisation of frame
    • Basic Frame
    • Width of the frame = 38 m
    • Height of the frame = 18m
    • Length of the frame = 45 m
    • Bay spacing l = 7 m
    • Slop of roof i= 1:10
    • Wind speed v = 43 m/s
    • Seismic zone = 4
  • 17. Varying of Width of Frame Only Primary Frame Design Purline 250 X 2.5 mm 2 Spacing-1.5 7.67 kg/m Design Girt 200X1.75 mm 2 Spacing-1.5 6.09 kg/m
  • 18. Varying Height and width Only Primary Frame Design Purline 250 X 2.5 mm 2 Spacing-1.5 7.67 kg/m Spacing-1.5 Design Girt 250X2.0 mm 2 Spacing-1.5 6.09 kg/m Spacing-1.5
  • 19. Varying Bay length with Height Total weight of Frame, Purline and Girt Heigth-6 Heigth-8 Heigth-9 Purline Girt Purline Girt Pur line Girt 6 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 7 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 8 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 9 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 10 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0
  • 20. Varying bay length with width Total weight of Frame, Purline and Girt Heigth-6 Heigth-8 Heigth-9 Purline Girt Purline Girt Purline Girt 6 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 7 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 Z 250X 2.0 Spacing-1.5 Z 250X1.75 Spacing-1.35 8 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 9 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 C250 X 2.5 Spacing-1.4 C 250 X 2.5 Spacing-1.35 10 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0 C 250 X 2.5 Spacing-1.0
  • 21. Varying wind speed with width Total weight of Frame, Purline and Girt wind Width-20m Width-35 speed Purline Girt Purline Girt 33 Z 200 X 1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 Z 200 X 1.75 Spacing-1.5 Z 200X1.75 Spacing-1.5 39 Z 200 X 2.0 Spacing-1.5 Z 200X2.0 Spacing-1.5 Z 200 X 2.0 Spacing-1.5 Z 200X2.0 Spacing-1.5 43 Z 250 X 2 Spacing-1.5 Z 250X2.0 Spacing-1.4 Z 250 X 2 Spacing-1.5 Z 250X2.0 Spacing-1.4 47 Z 250 X 2.5 Spacing-1.5 Z 250X2.0 Spacing-1.45 Z 250 X 2.5 Spacing-1.5 Z 250X2.0 Spacing-1.45 50 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 Z 250 X 2.5 Spacing-1.5 55 C 250 X 2.5 Spacing-1.35 C 250 X 2.5 Spacing-1.5 C 250 X 2.5 Spacing-1.35 C 250 X 2.5 Spacing-1.5
  • 22. Steps of Design
    • Wind load calculation
    • Purline Design
    • Girt Design
    • Design of Main Frame
    • Base Plate
    • Anchor Bolt design for Moment Condition
    • Anchor Bolt design for Shear Condition
    • Gable column design
    • Design of connection plate
    • Cranes Design
  • 23. Wind load calculation
  • 24. PURLIN
  • 25. Base plate
  • 26. PROCESSES PEB BUILT UP LINE COLD FORM LINE SHEETING PRIMARY MEMBERS CKD C & Z PURLINS LINE HR SECTIONS & MISCELLANEOUS PARTS ROOF & WALL SHEETING GUTTER, FLASHINGS, TRIMS, ETC CKD CKD CKD ACCESSORIES SHIPMENT
  • 27. ERECTION SYSTEM
    • UNDERSTANDING THE ENGINEERING DOCUMENTS.
    • Anchor Bolt Setting Plan
    • Cross section
    • Roof framing plan
    • Roof sheeting & framing
    • Sidewall sheeting & framing
    • Other drawings
    • Bill of materials
  • 28. CONTD…
    • Preparation for Erection
    • Pre Erection checks
    • Receiving Materials at site
    • Unloading Containers
    • Erection of the Framing
    • Preparation of the First Bay
    • Main frames
    • Mezzanine floors
    • Crane Beams
  • 29. CONTD….
    • Sheeting & Trimming
    • Sheeting preparation
    • Sheeting the walls
    • Sheeting the roofs
    • Miscellaneous trimmings
    • Fascia