3. PRE ENGINEERED BUILDINGSPRE ENGINEERED BUILDINGS
The buildings are design as per
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.
4. 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 HISTORYBRIEF HISTORY
5. APPLICATIONS
Industrial Buildings
Warehouses
Commercial Complexes
Showrooms
Offices
Schools
Indoor Stadiums
Outdoor Stadiums with canopies
Gas Stations
Metro Stations, Bus Terminals, Parking Lots
Primary Health Centers, Angan wadi’s
And many more…
9. 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.
10. 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.
11. 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
14. OTHER MAJOR COMPONENTS OF
PEB
CRANE BRACKETS &
BEAMS
MEZZANINE FLOORS
STRUCTURAL
PARTIONS
FASCIAS CANOPIES
15. Load 1
X
Y
Z
PRE-ENGINEERED BUILDINGS NOMENCLATURE –
STANDARD FRAMING SYSTEMS
TCCS = TAPERED COLUMN CLEAR SPAN
Load 1
X
Y
Z
TCMS-1 TAPERED COLUMN MULTI-SPAN WITH 1 INTERMEDIATE COLUMN.
16. Load 1
SSCS = SINGLE SLOPE CLEAR SPAN.
Load 1
X
Y
Z
SSMS-1= SINGLE SLOPE MULTI-SPAN WITH 1 INTERMEDIATE COLUMN
17. GUIDELINES FOR PEB DESIGN AT
PROPOSAL STAGE
All Designs Shall Be As Per MBMA [Metal Building
Manufacturer Association] &Client Specifies As Per Is
Code.
Live load as Per American Code = 0.57 KN/M2
and as
Per IS Code = 0.75 KN/M2
. (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.
18. 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
19. design codes generally used:
AISC : American institute of steel construction manual
AISI : American iron and steel institute specifications
MBMA : Metal building manufacturer’s code
ANSI : American national standards institute
specifications
ASCE : American society of civil engineers
UBC : Uniform building code
IS: Indian standards
20. Equivalent to Indian standard
IS 800: For design of structural steel
IS 800-2007: For design of structural steel by LSM
IS 801: For design of cold formed section
IS 875: For calculation of load
23. ANALYSIS :-
1.Dead load calculations
2.Live load calculations
3.Wind load calculations
LOAD COMBINATIONS :-
A. 1.5(DL + LL)
B. 1.5(DL + WL)
PLOT THE MAXIMUM SFD AND BMD OF THE MEMBERS :-
DESIGNING :-
1.Design of the primary members
2.Design of connection plate
3.Purline Design
4.Girt Design
5.Base Plate
6.Anchor Bolt design for Moment Condition
7.Anchor Bolt design for Shear Condition
8.Cranes Design
DESIGN STEPS
24. Optimisation of frame
Basic Frame
• Width of the frame = 16 M
• Height of the frame = 8 M
• Length of the frame = 35 M
• Wind speed V = 43 M/S
• Bay spacing L = 7 M
• Slop of roof I= 1:10
• Seismic zone = 4
32. ERECTION SYSTEM
Understanding The Engineering Documents.
1. Anchor Bolt Setting Plan
2. Cross section
3. Roof framing plan
4. Roof sheeting & framing
5. Sidewall sheeting & framing
6. Other drawings
7. Bill of materials
33. Preparation for Erection
1. Pre Erection checks
2. Receiving Materials at site
3. Unloading Containers
Erection of the Framing
1. Preparation of the First Bay
2. Main frames
3. Mezzanine floors
4. Crane Beams
34. Sheeting & Trimming
Sheeting preparation
Sheeting the walls
Sheeting the roofs
Miscellaneous trimmings
Fascia