Introduction of Pre-engineered Building
PRE-ENGINEERED BUILDINGS (PEB)
Pre-engineered buildings are the building structures or components that are manufactured in the factory and assembled at the site. Usually, PEBs are steel structures because steel is the best choice for design because of its elasticity and flexibility. This type of structural concept is mostly used to build Industrial Buildings, Metro Stations, Warehouses, Canopies, bridges, etc. Economically, it is cheap, very fast to erect, and can also be dismantled and moved to another site.
The construction speed of PEB is the fastest as compared to other constructions. While the foundation and floor slab are being constructed, the structural system—rafters (beams) and columns—is being fabricated in the factory. Once the foundations and plinth beam are done, the columns are shipped to the site, lifted into place by crane, and bolted together.
PURPOSE OF PRE-ENGINEERED BUILDINGS (PEB)
Pre-engineered buildings are the first preference of almost every person due to many reasons. It provides all the advantages, from versatile features to long durability, with the lowest maintenance costs and a faster build-up process. It also provides a gigantic space that is up to 150’ wide. Their long span of time, durability, resistance to rust, fire, and bad weather conditions are the most common and impressive features of the steel building.
COMPONENTS OF PRE-ENGINEERED BUILDINGS (PEB)
a. Main framing or vertical columns
b. End wall framing
c. Purlins, girts, and eave struts
d. Sheeting, insulation and weldmesh
e. Crane system
f. Mezzanine system
g. Painting and finishing
STEPS FOLLOWED IN THE CONSTRUCTION OF PRE-ENGINEERED BUILDINGS (PEB)
1. Design of the Structure: Design forms a key aspect in the construction of PEB. The steel frames to be used in a particular structure is extensively designed and fabricated through software in a company. This design involves the use of meticulous design software, leaving no room for any error or change in the structural frames.
2. Construction of Foundations: It involves the conventional construction practice of site clearance and the building of concrete foundations.
Usually, shallow, isolated foundations are preferred for a PEB since the self-weight of the superstructure is very low. In areas like coastal zones, pile foundations are laid, but the depth of the pile is less when compared to conventional concrete structures. They often prefer to lay a flat slab base of PCC below the pedestal to prevent direct contact with the soil. The columns of the superstructure are bolted to the pedestal.
3. Erection of Steel Frames: In the next step, the steel columns and beams are bolted together. The grade of steel used varies based on the structural requirements. For instance, if it is a one-story building, then the thickness of the steel provided can be less, but for a warehouse, the thickness to be provided increases.
4. Construction of walls on all sides: Building the walls is the final step in the construction of a PEB. Usually, for a PEB, the walls are built with a different range of materials, like granite, fibre cement insulated panels, insulated steel or aluminium panels, conventional brickwork, stone cladding, etc., the choice depends on the user. Generally, an engineer prefers insulated steel panels because of their structural stability.