2. Pre-Engineered Building (PEB s)
• A Pre-Engineered Building is a metal building that consists of light gauge
metal standing seam roof panels on steel purlins spanning between rigid frames
with light gauge metal wall cladding. It is a relatively flexible structure vs.
a conventional steel framed building. In other words, it has a much greater
vertical and horizontal deflection. The intent for this publication is to
recognize the nature and limitations of pre-engineered. • Pre-engineered
building concept is widely used in many of the industrialized countries. It
consists of a complete steel-framed building system, with components pre-
designed to fit together in a vast variety of combinations to meet the unique
requirements of specific end uses.
3. Different members in the assembly of the preengineered buildings
1. 2. 3. 4. 5. 6. 7.
Eave strut Roof panel Roof purlin Rigid frame rafter Ridge line End wall Wall
panel
8. 9. 10. 11. 12. 13.
Side wall Rigid frame column Downspout Gutter Ridge panel Cable bracing or rod
bracing(at roof and wall)
4.
5. Terminologies in Pre-Engineered Buildings
• Base Plate A plate attached to the base of a column which rests on the
foundation or other support, usually secured by anchor bolts. Butt Plate The end
plate of a structural member usually used to rest against a like plate of
another member in forming a connection. Sometimes called a split plate or bolted
end plate. Bay The space between frame centre lines or primary supporting
members in the longitudinal direction of the building. Brace Rods Rods or cables
used in roof and walls to transfer loads such as wind loads, and seismic and
crane thrusts to the foundation. (Also often used to plumb buildings, but not
designed to replace erection cables.) Clear Height: This is the distance between
the Finished Floor Level to the bottom of knee joint. Roof Slope (x/10): This is
the angle of the roof with respect to the horizontal. The most common roof
slopes are 0.5/10 and 1/10. Any practical roof slope is possible.
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6.
7. Typical Pre-Engineered Building Assembly
• The  Rigid Frame  assembly is the most common frame used in
preengineered buildings. Basically, the rigid frame consists of a structural
steel (hot-rolled) moment-resisting column and beam assembly that carries the
coldformed roof purlins (usually  Z  shaped) and wall girts (usually  C 
shaped). In addition, diagonal rod bracing is required in the walls to resist
horizontal loading on the building (i.e., wind loads and/or seismic). Rod
bracing is also provided within the roof framing to resist "racking", or
twisting of the building.
•
•
9. DETAILS of FITTINGS
PARTITION
SIDEWALL ROOF EXTENSION
MEZZANINE AT ENDWALL
ENDWALL ROOF EXTENSION WITH SOFFIT
CURVED EAVE WITH PROJECTION
CURVED EAVE WITHOUT PROJECTION
12. ADVANTAGES
1. Fast Project Construction: - Buildings are fabricated and delivered within a
short period due to standardisation. - Fast erection because all members are
field bolted. 2. Functional Versatility: - Modular construction. - Large clear
Spans (up to 100m). - Long Bay Spacing (up to 13m). - Buildings are easily
expandable on all sides (allowing for future expansion). 3. Architectural
Flexibility: - Aesthetic features such as fascias, parapets and curved eaves
greatly improve the appearance of the building. - Readily available interface
details between steel and other materials (glazing, block wall, curtain wall,
etc.). 4. Low Maintenance and Operating Costs: - Virtually no maintenance
required for all panels. - Roof requires only periodic cleaning. - Annual
washing of Eave Gutters. - Watertight roofs.
13. Possible Disadvantages
1. Relatively short life-span 2. Sometimes has an  industrial  or
 warehouse  look to it 3. The foundation system is NOT designed by the
manufacturer 4. On-site alteration in design can t be done.
14. Application of Pre-Engineered Buildings
• • • Commercial buildings Auditoriums and Halls Administration buildings
Airport Factories
Mall
Processing mills
Warehouses
Stadiums
Animal feed sheds High rise buildings
Shipyards
16. Warehouse, Mandideep, Kirby Building Systems
I-Section Column C-Section Purlin Z-Section Purlin Diagonal bracing
Foundation
I-Section Column Base Plate
19. Some of the significant advantages of PEB buildings over conventional buildings
PEB Buildings
Aesthetically appealing appearance Reduced time because of international design
standards & codes using standard sections and connections
Conventional Building
Special aesthetic design required Increased design time due to scratch and
availability of less design aids
Higher resistance to seismic forces due to low weight Rigid heavy weight
structures not suitable for seismic flexible frames zones 30% less PEB steel
structures weight through efficient use of steel Factory controlled quality High
weight due to excessive safety factor and the usage of heavier steel sections
Every project to be fabricated at site
Lower initial cost of peb steel buildings(cost per Special design and features
developed for each square meter about 30% less than the conventional) project at
higher costs and faster delivery Simple Foundation, easy to construct and light
weight of PEB structures Average delivery time 6-8 weeks Extensive heavy
foundation Average delivery time 22-28 weeks
