PEB (Pre-Engineered Building) structures have become the need of the day. Almost every industry tends to build a PEB structure instead of traditional buildings. These pre-engineered steel buildings are made using several components. These components are designed in a factory and then transported to the construction site for assembly. These components work together as a complete system. This ensures a durable, strong, fast and cost-effective building solution.
If you want to learn about these components, read this blog. As one of the best pre-engineered steel suppliers, we are going to list all the main components in the PEB structure.
Main Components in the PEB Structure

Column
A column is one of the elements of PEBs. Columns stand vertically and support the entire load from the roof, transferring it down to the foundation. Their role is akin to the spine of the structure, resisting both vertical loads and some lateral loads.
Mid Span
This is the middle portion of the horizontal beam or rafter that distributes the load between two supports. They are important because they make sure the roof does not sag.
Wind Brace
Being the best pre engineered steel suppliers, we know that the wind brace helps buildings by preventing them from swaying during wind or seismic forces. These diagonal members on the roof or wall ensure stability by transferring lateral loads to the ground.
Wall Girt
Wall Girts are horizontal members that are set on columns, running along the wall. Their are important because they support wall cladding (sheet panels) and transfer wind loads right from walls to columns.
Mullion
Mullion is the vertical intermediate member between two large wall panels or frames. This helps support wall panels, adding stiffness to prevent the building from bending.
Fascia Purlin
It is located at the fascia (edge) of the PEB structure. Its role includes supporting cladding and giving a finished look to the edge. It also carries loads of edge.
Gutter
A gutter is a channel that is installed at the eaves of the roof. It can collect and divert rainwater away. So, the role of the gutter includes preventing leakage or foundation damage by diverting rainwater from the structure.
Roof Purlin
Roof Purlins are horizontal members that span between the rafters or trusses. They can support the roof sheets and transfer their loads to the main trusses or rafters.
OWJ Truss (Open Web Joist Truss)
OWJ Truss is a lightweight steel truss that comes with an open web design. They provide a large span capability with less steel. Best Pre Engineered Steel Suppliers use them to support the roof purlins and carry roof loads efficiently.
Ridge Cap
Ridge cap is another important component of PEB structures. They are installed at the peak of the roof where two sheets come to meet. They are used to prevent water leakage and seal the roof at the top.
Pitch
Pitch is the angle or slope of the roof. They ensure fast drainage of rainwater and maintain the appearance of the building.
Length
As the name suggests, length is the longitudinal dimension of the building. If you hire the best pre engineered steel suppliers, you will see that they will measure length from one end wall to the other. The accurate length of the building determines how long the structure is.
Bay Spacing
Bay Spacing in a PEB building covers the distance between two adjacent frames (columns/trusses) along the length. They are optimized for cost efficiency and structural stability.
Bottom Line
The bottom line is that columns and Trusses support the loads from the roof and transfer them down to the foundation. purlins, girts, and mullions provide intermediate support for sheets. Bracing ensures stability. and pitch, ridge cap, and gutter deal with roof shape and water drainage. Length and Bay Spacing define building size and layout.
There are many other components in a PEB structure. If you are looking for the best pre-engineered steel suppliers, then make sure they use the above components to make your PEB stronger, more durable, and long-lasting. At Primex, we are committed to making the structures that are best in every aspect of functionality.