When it comes to designing and manufacturing steel structures, most people focus on the main frames, columns, and exterior panels.
Yet between these major components lies a hidden hero that holds everything together — the purlin.
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What Are Purlins?
Purlins are the intermediate structural elements that connect the main frame to the outer covering of the building — whether it’s sandwich panels or metal sheets.
Though simple in appearance, they play a crucial role in the strength, stability, and cost-efficiency of any metal building.
1️⃣ Supporting and Fixing Metal Panels
Purlins act as the support system for roof and wall sheets, keeping them firm and preventing vibration or sagging over time.
Without them, it would be impossible to properly attach or secure the cladding of a steel structure.
2️⃣ Distributing Loads Evenly
One of the most important functions of purlins is to transfer and distribute loads evenly across the main frame.
Whether it’s the weight of the roof, or external forces like wind, rain, or snow, purlins channel these loads safely to the columns — maintaining overall structural balance and stability.
3️⃣ Reducing Weight and Construction Cost
Using purlins allows for wider spacing between main frames, which means less steel is needed without compromising strength.
This makes the structure both lighter and more cost-efficient, while still ensuring durability and safety.
4️⃣ Easy Installation and Maintenance
Purlins are usually connected with bolts or metal joints, which makes installation fast and flexible.
They also provide an ideal surface for installing insulation, lighting, and piping systems, adding functional value to the structure beyond support.
A Small Element with a Big Impact
Though purlins may look like a small detail on technical drawings, they are actually one of the key elements behind the success of every well-designed steel structure.
They strike the perfect balance between strength, efficiency, and economy — a balance that defines high-quality engineering.
Hasanoglu: Building Strength from Every Detail
At Hasanoglu, we pay close attention to every component — from the main frame to the purlins — ensuring precision, quality, and long-lasting performance in every steel structure we manufacture.
Because true strength starts from the smallest details.