ASTM A913 Steel Structure | High-Strength H-Beam Steel for Industrial & Commercial Buildings
Steel Truss Frame Structure for Modular Building The steel truss frame is a kind of structural system in which the steel members are connected together in the form of triangular units in a particular sequence to make a rigid frame that can be used to support the applied loads. Triangular shape maximizes strength and stability with less material and is suitable for long span and open room.
Outstanding Features
High Strength-to-Weight Ratio -- Triangular truss geometry enables strong load carrying capacity with less steel.
Wide Clear Span - Covers a wide area without internal columns.
Multi-purpose design - Good for warehouses, workshops, manufacturing plants and for auditoriums & sports halls.
Prefabrication & Rapid Assembly - Steel parts are pre-cut and formed off-site and quickly bolted together on-site.
Longevity – With adequate application of corrosion protection (galvanizing, painting, or coating), a steel structure will have a service life many decades long.
Parts
Top Chord: Upper horizontal or sloped member of the truss
Bottom Chord: Bottom horizontal member in tension
Web Members: Diagonal and vertical elements that compose the triangular unit
Connections: Bolted or welded seams that joins the members
Bracing (Optional): Extra lateral stability for large spans
Core steel structure products for factory construction
1. Main load-bearing structure (adaptable to tropical seismic requirements)
| Item | ASTM A913 Steel Structure |
| Material | ASTM A913 Grade 50 / 60 / 65 (High-strength low-alloy structural steel) |
| Span Range | 15–60 m (49–197 ft), customizable |
| Eave Height | 4–15 m (13–49 ft), based on project needs |
| Roof Pitch | 5°–30°, adjustable for climate and drainage |
| Main Components | H-beam columns & beams (ASTM A913), secondary members (C/Z purlins), bracing system, bolted/welded connections |
| Core Functions | - Very high strength and load capacity |
| - Excellent toughness and weldability | |
| - Reduced steel weight and foundation cost | |
| - Fast fabrication and installation | |
| - Long service life and stability | |
| Structural Advantages | - High yield strength with low alloy content |
| - Good seismic and wind resistance | |
| - Suitable for large span and heavy load projects | |
| Common Applications | - Industrial: factories, workshops, power plants |
| - Logistics: warehouses, distribution centers | |
| - Commercial: malls, exhibition halls | |
| - Infrastructure: terminals, large public buildings | |
| Export Markets | North America, Central & South America, Middle East, Southeast Asia, Africa |
| Standards & Certification | ASTM A913, AWS welding standards, ISO quality system, third-party inspection available |
| Processing Method | Processing Machines | Processing |
| Cutting | CNC plasma/flame cutting machines, shearing machines | Plasma flame cutting for steel plates/sections, shearing for thin steel plates, with dimensional accuracy is controlled. |
| Forming | Cold bending machine, press brake, rolling machine | Cold bending (for c/z purlins), bending (for gutters/edge trimming), rolling (for round support bars) |
| Welding | Submerged arc welding machine, manual arc welder, CO₂ gas-shielded welder | Submerged arc welding (Dutch columns / H beams), stick weld (gusset plates), CO² gas shielded welding (thin walled items) |
| Holemaking | CNC drilling machine, punching machine | CNC Boring (bolt holes in connecting plates/components), Punching (batch small holes), With controlled holes diameter/position tolerances |
| Treatment | Shot blasting/sand blasting machine, grinder, hot-dip galvanizing line | Rust removal (shot blasting / sand blasting), weld grinding (deburr), hot-dip galvanizing (bolt/support) |
| Assembly | Assembly platform, measuring fixtures | The components of pre-assembled (column + beam + base) were disassembled for shipping after dimension verification. |
| 1. Salt spray test (core corrosion test) | 2. Adhesion test | 3. Humidity and heat resistance test |
| Standards ASTM B117 (neutral salt spray) / ISO 11997-1 (cyclic salt spray), suitable for the high-salt environment of the Central American coast. | Cross-hatch test using ASTM D3359 (cross-hatch/grid-grid, to determine peeling level); pull-off test using ASTM D4541 (to measure peel strength between coating and steel substrate). | Standards ASTM D2247 (40℃/95% humidity, to prevent blistering and cracking of the coating during rainy seasons). |
| 4. UV aging test | 5. Film thickness test | 6. Impact strength test |
| Standards ASTM G154 (to simulate strong UV exposure in rainforests, to prevent fading and chalking of the coating). | Dry film using ASTM D7091 (magnetic thickness gauge); wet film using ASTM D1212 (to ensure corrosion resistance meets specified thickness). | Standards ASTM D2794 (drop hammer impact, to prevent damage during transportation/installation). |
1. Overseas Branch & Spanish Language Support
We have foreign offices with Spanish-speaker personnel and we can speak 2 languages with our clients from Latin America and Europe.
Our team streamlines customs clearance, documentation, and export requirements to facilitate on-time delivery and expedite import processing.
2. Ready Stock For Fast Delivery
We keep sufficient standard hot rolled steel structure raw material stocks like H beam, I beam and steel structure components.
This means quicker lead times so customers can get a product they can count on, fast, for those emergency jobs.
3.Professional Packaging
All products are packed with standard seaworthy packaging(steel frame bundling,waterproof wrapping,edges protection).
This will guarantee and ensure safe loading, no movement during long distance transport and no damage when arrived at destination port.
4.Efficient Shipping & Delivery
We work with reliable national shippers and can provide flexible delivery terms:FOB, CIF, DDP.
by sea,rail,road,we promise you timely shipment and effective logistic tracking service.
Treatment on surface Display: Epoxy zinc-rich coating, Galvanized(hot dip galvanized layer thickness≥85μm service life can reach 15-20 years), black oiled, etc.
Black Oiled
Galvanized
Epoxy Zinc-rich Coating
Package：
The products are well protected in packaging to keep their surface and structure intact during handling. The parts are normally packaged with waterproof materials such as plastic film or rust proof paper and the small accessories are packed with wooden box. In addition, all the straps/parts are clearly marked to guarantee safe unloading and professional installation on site.
Transport:
Steel structures can be shipped by container or bulk carrier according to the size and destination. Large or heavy items are also firmly fastened by steel straps with wooden strips on both sides for double protection during transportation. All the processes in logistics are done according to the international transportation standard, even the long distance and overseas, to make sure the products delivery on time and safety.
1. What grades are available for ASTM A913?
Common grades include:
ASTM A913 Grade 50
ASTM A913 Grade 60
ASTM A913 Grade 65
Higher grades mean higher yield strength and better load-bearing capacity.
2. What are the main advantages of ASTM A913 steel structure?
High strength with reduced steel weight
Good ductility and seismic performance
Excellent weldability without preheating in most cases
Stable mechanical properties
Lower foundation and transportation cost due to lighter structure
3. Where is ASTM A913 steel structure commonly used?
Industrial buildings: factories, workshops, plants
Warehouses and logistics centers
Commercial buildings and exhibition halls
Infrastructure projects and public facilities
Large-span and high-rise steel structures
4. Is ASTM A913 suitable for seismic zones?
Yes. ASTM A913 has good toughness and ductility, making it suitable for earthquake-resistant steel structures, especially in seismic regions such as Central America, South America, and parts of Asia.
5. How does ASTM A913 compare with ASTM A992?
ASTM A913 generally has higher yield strength and better toughness than ASTM A992. It allows lighter sections for the same load, reducing steel consumption while maintaining structural safety.
6. Can ASTM A913 be welded easily?
Yes. ASTM A913 has low carbon equivalent, which gives it good weldability. In most cases, no preheating is required, and standard AWS welding procedures can be used.
7. What surface treatments are available?
Shop primer painting
Epoxy or PU coating system
Hot-dip galvanizing
Multi-layer anti-corrosion coating for marine or tropical areas
8. Can ASTM A913 steel structure be customized?
Yes. Span, height, layout, load design, coating, and connection methods can all be customized based on project drawings and local design codes.
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