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Pre-Engineered Steel Building Trusses
Main load-bearing structure for factories, industrial warehouses, and large-span structures
Large span / Long span
Without intermediate columns, the portal frame can achieve clear spans from 20m to over 60m, optimizing production and storage space.
Thi công nhanh
Toàn bộ cấu kiện được gia công sẵn tại nhà máy, lắp dựng tại công trường bằng bulong nên tiến độ thi công nhanh hơn nhiều so với kết cấu bê tông.
Fast construction
All structural members are prefabricated at the factory and assembled on site using high-strength bolts, resulting in significantly faster construction progress compared to reinforced concrete structures.
Cost-efficiency
Compared to traditional concrete buildings, steel frames help reduce foundation loads, material costs, and construction time.
Pre-Engineered Steel Building Trusses
Pre-engineered steel building frames allow for easy expansion of factory floor area, roof heightening, and integration of overhead cranes or additional equipment.
A properly engineered frame system enables the building to:
- Optimize steel weight and capital investment costs
- Ensure structural safety against wind loads and roof live/dead loads
- Allow large clear spans without interior columns
- Facilitate future expansion or structural modifications
HLM provides comprehensive design, manufacturing, and erection solutions for pre-engineered steel building frames, tailored to a wide range of industrial and commercial projects.
Quick consultationWhat is a Pre-Engineered Steel Building Frame / Truss?
The portal frame is the primary load-bearing steel structural system of a pre-engineered steel building, consisting of the following main components:
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Steel column
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Rafter Beam
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Gusset plate / Connection plate
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High-strength bolt
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Structural bracing system
This frame system distributes loads from the roof and walls down to the foundation, ensuring long-term structural stability and safety for the entire building.
About HLM
Structure of pre-engineered steel building frames
Steel column
The steel column is the primary vertical load-bearing member, directly connected to the foundation.
Features:
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Built-up I-sections are commonly used
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Engineered according to structural loads
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Connected to the foundation via anchor bolts
Steel Rafter
The rafter is an inclined beam supporting the entire roofing system.
Functions:
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Resist roof loads and wind loads
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Connect to roof purlins
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Distribute loads to the columns
Rafters can be designed as:
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Built-up steel rafters
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Hot-rolled steel section rafters
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Large-span steel rafters
High-strength bolted connection
Bolted connections enable fast and precise erection of frame components.
Advantage:
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High durability
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Fast erection
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Demountable or replaceable when needed
Structural bracing system
The bracing system includes:
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Roof bracing
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Column bracing
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Purlin bracing / Purlin sag rods
Enhances structural stability under wind loads or vibrations.
Classification of Pre-Engineered Steel Buildings
Pre-engineered steel buildings are typically categorized into 3 types:
Built-up steel portal frame
This is the most common frame type used in industrial factories and warehouses.
Advantage:
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Optimization of cross-sections based on internal force distributions
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Reduction in total steel weight
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Suitable for large clear spans
Hot-rolled steel section frames
Typically applied to:
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Small-scale structures
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Light-duty warehouses
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Residential buildings
Advantages:
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Fast erection and low cost
Crane runway frames
Dành cho nhà xưởng sản xuất có thiết bị nâng hạ.
Design requirements:
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Analysis of dynamic loads
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Structural reinforcement for columns and beams
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Crane runway beam and rail arrangement
Factors affecting frame cost
The cost of structural frames depends on:
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Building clear span
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Column height
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Roof loads
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Presence of overhead cranes
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Grade and type of steel used
Typically, costs are calculated based on:
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Unit price per kg of steel
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Or unit price per square meter (m²) of construction
Frame Design and Manufacturing Process
Step 1: Project Requirement Analysis
Includes:
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Building area
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Building height
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Roof load
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Overhead crane requirements
Structural Design
Structural engineers use specialized software to:
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Analyze internal forces
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Check deflection
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Optimize steel cross-sections
Step 3: Component Fabrication
Structural members are fabricated in the factory using: CNC cutting machines, automatic welding, and anti-rust painting or galvanizing.
Step 4: On-Site Erection
The erection process includes:
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Steel column erection
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Rafter assembly & installation
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Tightening bolts according to applicable standards
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Plumbness and elevation check
Frequently Asked Questions about Pre-Engineered Steel Building Frames
What is the lifespan of a pre-engineered steel building frame?
The service life can reach 30 to 50 years if properly designed and maintained according to technical standards.
Is it possible to expand the building after initial construction?
Yes. Pre-engineered steel buildings allow for seamless extension or expansion whenever required.
Are pre-engineered frames suitable for cold storage facilities?
Yes. Portal frames are custom-designed to withstand specific load conditions and cold storage environment requirements. A pre-engineered steel cold storage building integrated with cold storage racking systems serves as the optimal solution
