PRE-
ENGINEERED
BUILDING
AR 411 A
GROUP 10:
CAGAS
EUSEBIO
MABANSAG
WHAT IS PRE-
ENGINEERED BUILDING?
A pre-engineered structure is a building
type that is planned and manufactured
off-site, usually in a factory, and later
transported to the construction site for
assembly. While these structures are often
crafted from steel, they can also be built
using materials such as aluminum. The
design of a pre-engineered structure
generally adheres to a standard
framework, but it can be tailored to suit
particular requirements.
Pre-engineered structures
are commonly used for
industrial buildings,
warehouses, commercial
spaces, agricultural
buildings, and even
residential homes in some
cases. Their adaptability
and efficiency make them
popular in projects where
APPLICATIONS
time and cost are critical
factors.
ADVANTAGES OF PRE-
ENGINEERED BUILDINGS
1. COST-EFFECTIVE
PEBs are designed using tapered sections and manufactured in highly controlled
environment of a factory, which means there is less wastage of material
compared to traditional construction. They are also faster to erect, which
reduces labour costs.
2. DURABLE
Steel is a highly ductile material that can
withstand reversible loads like wind, and
earthquakes. Hence, PEBs are designed
to withstand the most extreme weather
conditions.
3. FLEXIBLE
PEBs can be customised to meet
the specific requirements of the
client. They can be designed to
accommodate various building
types, including commercial,
industrial, and residential.
4. ENVIRONMENTALLY
FRIENDLY
Since steel is a recyclable material,
this makes PEBs an environmentally
friendly choice. They can also be
designed for energy efficiency by
maximising natural lighting and
providing effective insulation, which
reduces the energy requirements of
the building
5.BUILT QUICKLY
Pre-engineered buildings can
be built quickly because
building components are
made off-site, while the
foundations get ready on the
construction site.
6. LOW MAINTENANCE
Modular structures are easy to fix.
One just has to replace the panels or
structural elements like columns,
without making going for any major
renovation work.
DISADVANTAGES OF PRE-
ENGINEERED BUILDINGS
RUSTING/CORROSION
SENSITIVE
as if the quality of steel used or paint used for coating of steel is not good of
quality, than it can damage the structure and thus reduces the life of the
structure
INSULATION COST
as insulating the building to an agreeable
benchmark will furthermore add to the
construction cost.
APPEARANCE
steel sections can be unattractive
when left exposed
Marginal design, material and
construction
May not include all construction/fit
up needed for the building to serve
the intend purpose
No secondary roof membrane
Usually no internal finished walls
MAJOR
COMPONENTS OF
PRE-ENGINEERED
STEEL BUILDINGS
PEB is made up of several
structural and non-structural
elements that are connected by
bolted joints. Let’s take a closer
look at the components of pre-
engineered buildings, which
include primary components,
secondary components, sheeting
or cladding, and accessories.
1.PRIMARY COMPONENTS
The primary components of a pre-engineered building are columns and rafters
that constitute the mainframe.
A. MAINFRAME
The mainframe is the skeleton of the building and is made up of built-up steel
sections. It is designed to reflect the size and shape of the building. It comprises
Columns and Rafters.
B. COLUMNS
The columns are vertical members that
support the main frame. They help
transfer the load of the structure to the
foundation.
C. RAFTERS
The rafters are horizontal
structures that connect the
columns and support the roof.
2. SECONDARY
COMPONENTS
The secondary components of a pre-engineered building include purlins and
girts, eave struts, and bracings.
1. Purlins and girts run perpendicular to the rafters, providing support for roof
sheeting
2. Eave struts are located at the intersection of Roof Sheeting and Wall
Cladding.
3. Bracings are diagonal members that provide (lateral) stability to the
structure.
3. SHEETING OR
CLADDING
The sheeting or cladding is the outer skin of the building and
provides protection from the environment. It can be made from a
variety of materials, including metal. It is supported by the
secondary components and is available in a range of colours
and finishes.
4. ACCESSORIES
Accessories are the additional components provided as per
building needs. These can include doors, windows, vents, and
insulation, among others.
TYPICAL MODELS OF PRE-
ENGINEERED STEEL BUILDINGS
CLEAR-SPAN PRE-ENGINEERED STEEL
BUILDINGS
Clear-span buildings are characterized by their open, unobstructed interior
space. They have no interior columns or supports, allowing for maximum
usable floor area. Clear-span buildings are often used for applications that
require large, uninterrupted spaces, such as warehouses, manufacturing
facilities, sports arenas, and exhibition halls.
MULTI-SPAN PRE-ENGINEERED
STEEL BUILDINGS
Multi-span buildings feature multiple interior
columns or frames that divide the interior space
into smaller sections. Multi-span buildings are
commonly used for commercial buildings,
offices, retail spaces, and industrial facilities.
LEAN-TO PRE-ENGINEERED STEEL
BUILDINGS
Lean-to-buildings are extensions or additions to
existing structures. They are typically attached to the
sidewall of an existing building and slope downward
to provide additional covered space. Lean-to
buildings are commonly used for storage areas,
equipment shelters, or covered parking.
MULTI-GABLE PRE-ENGINEERED STEEL
BUILDINGS
Multi-gable buildings feature multiple gable ends or rooflines. In multi-gable
buildings, there are multiple gable ends, each with its own roofline, creating a
visually appealing and distinctive architectural design.
CURVED RAFTER PRE-ENGINEERED STEEL
BUILDINGS
Curved rafter buildings have a visually appealing curved roofline that
adds elegance and uniqueness to the structure. They provide increased
headroom, structural strength, natural lighting, and design flexibility. They
are commonly used in applications such as sports arenas, exhibition
centers, theaters, and commercial buildings.
PRE-ENGINEERED STEEL
BUILDINGS WITH MEZZANINE
A pre-engineered steel building with a
mezzanine is a steel structure that includes an
intermediate floor level, or mezzanine, within the
building's interior. This provides extra usable
space, versatility, and flexibility. It is a cost-
effective solution for buildings that require extra
space.
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