What does “Open Mechanical Structure” refer to for I H-beam Welding Machine?

1) This means: Workpieces (BOX I H Beams) are put onto external open section of mechanical main body of machine, thus “no restriction” on size (height) of workpieces, especially height; 2) In LHC model, H Beam is laid on hydraulic drive 60° Overturning Racks alongside the LHC moving trolley. This motorized moving trolley moves along the H Beam during SAW welding; 3) In LHT model, the 2 pieces of H Beams are laid on the 2 arrays of supporting racks, which are at external both lateral sides of machine; 4) Customer determine and select on which type of I H-beam Welding Machine is better for operation, depending on H Beam specifications / process technology design/ workshop layout plan/ budget level of customer facility.

What are Advantages of Open Frame I H-beam Gantry SAW Welding Machine?

1) One Size fits for All: Because there is no confinement on placement of workpiece (BOX I H Beams) in open structure, so, size range of applicable workpieces has great extensive range than enclosed gantry frame types machines. In other words, when customer plan to produce new batch of H Beam, they do not need to fret over whether the current open structure I H-beam Welding Machine is applicable or not; 2) So, any sizes of H Beam, from the smallest web height 200mm, to the max. web height 2000mm, can be placed into LHC or LHT open frame machines; 3) Besides, other common seen steel structure workpieces, especially BOX Beam, can also be welded in open structure machines; 4) When customer plan to introduce new types of workpieces, say, long pipe/ post... the existing open structure machine can also be used without or with very few modifications on the existing machine.

What are Welding Mode and Operation in Open Structure H-beam Gantry SAW Welding Machine?

1) Major Welding Mode: 45° fillet SAW welding is the No.1 choice to be implemented in all models of machine. And, among this, majority is with single arc SAW welding; When customer need higher welding velocity, or thickness of H Beam flange and web are larger than 60mm, tandem arc SAW should be used; 2) Promise Heavy Welding: The strongest point of sole purpose I H-beam Welding Machine is to get solid welding seam formation in fabricated BOX T I H Beams, which guarantees sufficient penetration depth/ broad cover face of formed welding seam on finished workpieces; 3) Mature Welding Technique: SAW and other types of welding is managed by means of professional welding power supply (Single/ twin/ tandem arc welding machines), together with system of assistant welding operation, including welding torch position detect and control, welding wire feeding and straining unit, etc.; 4) Welding velocity is managed with A.C. inverter, and displayed real time intuitively in digital meter of machine operating panel.

What are Supply Range of Various types of I H-beam Welding Machine, including LHA series Gantry Frame, LHC model Trolley Column, and LHT model Open Structure?

1. This is a good question, that often neglect by customer and supplier company, and sometimes cause controversy. For example, in end of December 2025, when a Vietnam customer communicated with Wuxi JACK on LHA model H-beam Gantry SAW Welding Machine, we forgot to remind customer that, the 18m long parallel rails for gantry movement is not included supply range, because unlike rails of CNC Flame Plasma Cutting Machine, which need to be machined, for rails of I H-beam Welding Machine, the parallel rails do not need to be machined, do, it is not in scope of supply. This is common practice, but need to confirm with customer when making quotation; 2. Basically, supply scope of all types of I H-beam Welding Machine: 1) Mechanical main frame, including motor drive moving trolley for LHC, gantry frame for LHA, and T frame open structure for LHT; 2) SAW welding system, including different types of welding machines, welding torch mechanism, supplementary welding units, flux conveying and reuse machines; 3) Drive and transmission system on mechanical main frame; 4) Electric control system of machine; 3. Unless specifically designated by customer and negotiated accordingly, supply range of I H-beam Welding Machine do not include : 1) 2 arrays of triangular H Beam support rack; 2) Parallel rails for frame movement; 3) Cable overhang racks; But we provide drawing of these items for customer producing these items. The reason we do not provide these items is, it is easy to produce, but have large size and heavy weight, which will greatly increase logistic cost of I H-beam Welding Machine. To save freight charge on the machine for customers, we exclude these items from supply range of the machine.

How Many Operators are Necessary for Running on I H-beam Gantry Welding Machine?

This is another important question customer concerns during machine purchase analysis, and actually differs based on practical condition at customer site. the major factors affecting number of operators include: 1) Model and design of machine. For example, for LHA series H-beam Gantry SAW Welding Machine, there are 2 branches of: LHAC lateral operating type, which usually need 2 operators work on one machine; While one operator is sufficient for working on LHAZ middle operating type; 2) Quantity of machines on site: Especially for I H-beam Welding Machine, very often customer purchase more than one set of machine: For LHC model at automatic H-beam production line, usually 4 sets in a line; For LHA series gantry frame moving and LHT model open structure T frame I H-beam Gantry Welding Machine, one or two sets are installed in H Beam production workshop. Under ideal condition , one operator can take care on operation of 2 machines simultaneously, which can raise productivity; 3) Operator Proficiency: This is another controversy sometimes happened during business exploration. For example, also in end of December 2025, the Vietnam customer discussed with Wuxi JACK engineer on how many operator is necessary for operating on PHJ and ZHJ series 3 in 1 I H-beam Welding Machine. The Vietnam customer questioned on whether only one operator is capable of working on one set of the 3 in 1 machine, he told us that, in Vietnam factories, customer manager arrange on 2 operators to work on the machine: One as lead and one as main; On the other hand, from Wuxi JACK perspective, if operator is proficient, only one people is sufficient for managing on the 3 in 1 I H-beam Welding Machine.

Wuxi JACK Open Structure I H-beam Welding Machine,

Fabricating Big Size BOX H Beam with High Efficiency

Complete Line of Wuxi JACK I H-beam Gantry Welding Machine

1. 3 Major Types: LHT is machine model bridging the gap between LHC column trolley and LHA series H-beam Gantry SAW Welding Machine:
2. Welding Mode: The three kinds of I H-beam Welding Machine all adopt with SAW submerged arc welding, with H Beam in position of 45° for deep penetration fillet welding, or BOX Beam in position of 0° flat for finished SAW welding. The corresponding welding system also include same SAW welding power source and auxiliary welding units;
3. The applicable workpieces are the most common seen type in Steel Structure industry: H Beam (Or called I Beam) and BOX Beam. As sole purpose I H-beam Welding Machine, the 3 types of welding equipment is especially strong at welding on large and heavy H Beam: With web height up to 2000mm, and flange thickness up to 100mm;
4. Mechanical Structure: LHT model T frame open structure is the intermediate product connecting LHC (Also open structure) and LHA models enclosed frame H-beam Gantry SAW Welding Machine:
1) With open structure like LHC, so as to capable of accommodating on “infinite” size of H Beam, and one model fits for all;
2) With double sides drive and acting structure like LHA series, capable of welding on 2 pieces of H Beam simultaneously, and movement is more stable;
3) In addition to H Beam, LHT model I H-beam Gantry Welding Machine can also be applied for welding on BOX Beam, with BOX being placed at its internal middle moving table;
As professional supplier in the industry of Welding and Cutting Machinery, Wuxi JACK produces all the above I H-beam Welding Machine for customers:

Models of Wuxi JACK H-beam Gantry SAW Welding Machine:

1, LHT model open structure I H-beam Gantry Welding Machine works at customer facility:

2 sets of LHT work at Chinese customer workshop

2 sets of LHT trial run at newly started steel structure workshop

LHT being installed at East European customer factory

2 sets of LHT operate at Chinese busy running facility

2, LHC model Column Trolley type I H-beam Welding Machine:

Batch production on 3 sets of LHC at Wuxi JACK workshop

Operate at Chinese steel structure customer company

Batch production on 8 sets of LHC in year 2025 at Wuxi JACK

Work at heavy duty automatic H Beam Production Line

PHJ and ZHJ Models 3 in 1 I H-beam Welding Machine:

This is BOX product of Wuxi JACK. It is used for assembly, welding and straightening small to medium size H Beam (Flange thickness ≦40mm), with single set of machine. Wuxi JACK took the lead to develop and push into market three in one I H-beam Welding Machine since the year 2009. It is the best selling product over the past 2 decades:

PHJ15 produces variable height H Beam (Web height changes along length)

ZHJ15 operates at Argentina customer facility in November 2025

2 sets of ZHJ18 operates at Chinese steel structure workshop

Wuxi JACK engineer had trial run on PHJ20 at Chinese customer facility

Newly Produced H-beam Gantry SAW Welding Machine in Year 2025 by Wuxi JACK

1. 4 Sets of LHT model I H-beam Welding Machine:

In October and November 2025, Wuxi JACK delivered 4 sets of LHT model machine in total to 2 East European customers respectively. The 2 times delivery on LHT machines:
1) Welding Mode: Single arc SAW, max. 1000A;
2) SAW Welding Machines: Were equipped with American Lincoln brand DC1000 and Chinese HUAYUAN ZD7-1000 SAW welding power supply, designated by customers;
3) The size of H Beam that can be welded is conventional type: Flange thickness up to 40mm, Web height up to 1500mm:

Final assembly at workshop

Assemble on Welding Torch Arc Tracker Unit

Ready for SAW welding performance test

Stuffed into Container for Machine Shipment

2. 12 Sets of LHC model I H-beam Welding Machine:

In July and August 2025, Wuxi JACK delivered totally 12 sets of LHC heavy model I H-beam Welding Machine to an East European dealer, for 2 and half automatic H Beam Production Line:
1) Welding Mode: Tandem arc SAW;
2) SAW Welding Machines: Each set of the LHC is equipped with 2 sets of Chinese HUAYUAN D.C. 1600A and A.C. 1200A SAW welding power supplies respectively;
3) The size of H Beam is large: Web height can be up to 2000mm, and flange thickness 100mm:

8 groups of HUAYUAN Tandem Arc SAW welding machines in wooden case and 8 sets of LHC at behind

Batch assembly and cable wiring on 8 sets of LHC at workshop

Integrated control console of tandem arc SAW welding machines: D.C.1600A and A.C.1200A

Batch delivery on 4 sets of LHC machine

Working Videos of Wuxi JACK Different Types I H-beam Welding Machine

Related Page:
1) H Beam Production Line;
2) I H-beam Gantry Welding Machine

Major Technical Parameters of Wuxi JACK LHT Model Open Structure I H-beam Gantry Welding Machine

Below are technical specifications of LHT model I H-beam Welding Machine for your quick review. For more detailed introduction on LHC and LHT models open structure machine, please check ending section of this page:

Parameter	Specification	Note
Operator Work Position	Beneath T frame, between 2 supporting racks, stand on the floor
H Beam Flange Width	200-800mm
H Beam Flange Thickness	6-40/ 50/ 60/ 80/ 100mm, can be special made
H Beam Web Height	200-1,500/ 1,800/ 2,000mm
H Beam Web Thickness	6-32/60mm, can be special made
H Beam Length	4,000-15,000mm, can be special made
BOX Beam Max. Side Width and Thickness/ Length	Width 1200mm/ Thickness 20mm/ Length 15,000mm
Gantry Movement Rail Length	18,000mm
Gas Pressure	0.4-0.6Mpa, for drive on welding arc tracing unit
T Frame Drive mode	Double drive, with 2 motors at both ends

Value of Open Structure I H-beam Welding Machine for Customer

A. Operation Mode of H-beam Gantry SAW Welding Machine:

1. Applicable Workpieces and Welding Technique in I H-beam Gantry Welding Machine:

1) BOX T I H Beams, the large size heavy weight steel structure workpieces, which are usually made of carbon steel:
a) The common weight is in the range of 5 to 10 Ton, max. 20 Ton;
b) Heavy duty: H Beam flange and web in the thickness range 6mm to 40/ 60/ 80/ 100mm;
c) Medium large size H Beam welded from Wuxi JACK LHT model open structure I H-beam Gantry Welding Machine: (Fig.1)

Fig1 I H-beam Welding Machine 1 IMG_20161207_092956

2. Welding Technique Adopted in I H-beam Gantry Welding Machine:

1) H Beam: To firmly weld the steel structure workpiece with sufficient welding seam integrity and strength, 45° fillet position large current SAW submerged arc welding technique is carried out, of single arc/ twin arc/ tandem arc options:
At Bangladesh customer facility, operator checks on the 45° fillet SAW submerged arc welding in Wuxi JACK H-beam Gantry SAW Welding Machines: (Fig.2)

2) In the case of welding on BOX Beam, the workpiece is laid in 0° flat position, at middle of bottom position of machine gantry frame. For this reason, the max. thickness of BOX Beam for welding is usually 20mm:
BOX Beam welding in Wuxi JACK LHT and LHA models H-beam Gantry SAW Welding Machines: (Fig.3)

Fig3 H-beam Gantry SAW Welding Machine 108

B. Advantages and Operation Way of I H-beam Gantry Welding Machine:

1. Multiple Passes Welding: Different from 3 in 1 I H-beam Welding Machine, which usually entails one time welding only on workpiece, here in sole purpose machine on BOX and H Beam welding, two or more passes welding can be implemented along the entire length of workpiece, by driving machine gantry frame back and forth several times along workpiece;
2. Accordingly, deep penetration and broad cover face welding seam can be acquired, meeting customer requirement on building heavy duty steel structure constructions. This is especially useful for building H Beam with flange and web thickness thicker than 40mm:
3. Wuxi JACK LHT model I H-beam Gantry Welding Machine mechanical main frame moves along 2 pieces of H Beam for carrying out SAW welding: (Fig.4)

4. Operation Manner of Gantry Moving I H-beam Welding Machine:

1) H Beam Position: As shown in the above photo, during operation, the 2 pieces of H Beams are laid in stationary onto on its support rack;
2) Welding Operation: Mechanical gantry frame and its installed 2 pieces of welding torches move along H Beams, and perform SAW welding at the same time;
3) Welding Velocity Management: The gantry moving speed is welding speed, which is adjusted with A.C. inverter, and shown in real time on digital meter of operating panel;
4) Operating panel of Wuxi JACK LHT and LHA model I H-beam Gantry Welding Machine, with welding speed regulation and display: (Fig.5)

C. Model Variation on I H-beam Gantry SAW Welding Machine:

1. Mechanical Body of I H-beam Welding Machine:

Is originated and differed from application conditions of:
1) Application Site: Will the machine be applied in automatic or semi-automatic H Beam Production Line?
2) Max. size of workpiece: H Beam web height, flange and web thickness;
3) Labor Task: Planned arrangement of operator during welding operation;
4) Type of Workpieces: Will BOX Beam be welded also or not in this machine?
5) Quantity of welding torches and supplementary units;

2. Three Types of Mechanical Structure I H-beam Gantry Welding Machine:

1) LHC model column trolley structure, with one group of welding unit in one set of machine, being applied in automatic line for H Beam production:
Design sketch on LHC model I H-beam Welding Machines, 2 sets facing each other in installation: (Fig.6)

2) LHT model T frame, with two groups of welding torches in one machine, for being used in semi-automatic H Beam production line:
Design sketch on Wuxi JACK LHT model open structure I H-beam Gantry Welding Machine, with 2 sets of welding torches: (Fig.7)

3) LHA series gantry moving structure. It is similar to LHT, exception is with multiple selections of model, in terms of subdivision on structure for operator work duty arrangement, and H Beam specification:
a) Design sketch on LHAC model side management, 2 operators work at both sides of machine main frame: (Fig.8)

Fig8 H-beam Gantry SAW Welding Machine 1

b) Design sketch on LHAZ model center management, 1 operator monitor on 2 pieces of H Beam welding simultaneously: (Fig.9)

Value Chain of Wuxi JACK I H-beam Gantry Welding Machine

2 I H-beam Gantry Welding Machine 45 IMG_4306

4 H-beam Gantry SAW Welding Machine 79 IMG_20240725_112224

5 I H-beam Gantry Welding Machine 90 IMG_20240725_112048

6 I H-beam Welding Machine 99 IMG_20211118_111731

Producing on I H-beam Welding Machine

The Lefthand Scrolling Photos: Process step, WIP (Work in process) for Order to Delivery manufacturing cycle of Wuxi JACK H-beam Gantry SAW Welding Machine

As a technology based company, Wuxi JACK concentrates on exploring technical knowhow in our product, to get the best performance of our machines, machineries, equipment. Every component/ assembly of I H-beam Welding Machine, including:
1) Mechanical main frame, of T frame open structure, or gantry enclosed frame, or column trolley open structure;
2) Drive and transmission: Motor and reducers, chains, sprockets;
3) Mechanical and pneumatic mixed type welding arc tracker units, managing on proper position of welding torch;
4) Outsourced and self-produced welding unit: SAW welding machines, SAW welding flux conveying and reuse machines, welding torch drive and control mechanism, welding wire feeding unit;
5) Electric control board and operation panel of the entire machine

Technical Superiority of Wuxi JACK I H-beam Gantry SAW Welding Machine

1. Welding Seam Tracer of I H-beam Welding Machine:

This unit plays key role in confirming on superior and stable welding quality on BOX H Beam. It is specifically reflected in formation of welding seam on workpieces:
1) What if Welding Quality without Seam Tracker? During submerged arc welding, suppose welding torch deflects away from its proper target position, and could not keep its correct position in stable way, then, the completed welding seam will grow crooked with inconsistent welding seam height and cover face;
2) This not only deteriorates on appearance of finished welding seam, but also more seriously is, inferior welding quality on workpieces I H-beam;

2. Ingenious Design and Delicate Workmanship of Welding Seam Tracker of Wuxi JACK I H-beam Gantry Welding Machine:

1) As you can check from the above photos, Wuxi JACK has ingenious design, real talent and material on welding seam tracing unit equipped in our machines;
2) Capability: The welding seam tracker has spatial three dimensional tracing ability in precise manner, during welding operation: Along horizontal direction, it is managed with gas cylinder, floating type; Along vertical direction, it is managed with gravity;
3) Tracking Elements: There are leaning rollers for both horizontal and vertical direction track, which touch with surface of horizontal welding seam and vertical mounting carriage tightly in dynamic way, in the process of SAW welding;
4) Working Principle: During SAW welding in the I H-beam Welding Machine, the up and down movement of welding seam tracer works in floating style, while horizontal movement is driven with pneumatic valves. This gives flexible and most fitting control on welding seam tracer in all directions;

3. Operation Manner of Welding Seam Tracker in Wuxi JACK I H-beam Welding Machine:

1) Fully Automatic: Welding seam tracing unit operates in the machine automatically;
2) Compact Design: Shown in the above photos, SAW welding flux feeding tubes are integrated into the welding seam tracing unit, making compact design and dimension of the entire welding group, in Wuxi JACK I H-beam Welding Machines, with the supplementary unit of welding seam tracer.

Application of Open Structure Gantry Frame I H-beam Welding Machine

1. Mechanical Structure and Workpieces of T Frame I H-beam Gantry Welding Machine:

a) Assembly on 4 sets of LHC model machines at Wuxi JACK Workshop: (Fig.1)

Fig1 I H-beam Welding Machine 25A IMG_20250313_135733

b) Performance test on LHT model machine: (Fig.2)

Fig2 I H-beam Gantry Welding Machine 92A IMG_20240726_070543

1) Common Point: Open Frame: Shown from the above photos, these two models of I H-beam Welding Machine all have open mechanical structure main frame;
2) Single Model Suitable for All Sizes H Beam: For this reason, any one size of T I H Beam, from minimum 200mm web height, to the maximum 2000mm web height, can be SAW welded on the same one model of LHC or LHT models H-beam Gantry SAW Welding Machine;
3) Available for BOX Beam Welding Also: Remove platform at bottom of the T frame, as shown in below photo, the LHT model can also be used for welding BOX Beam. For this purpose, BOX Beam should be placed at bottom middle inside the moving T frame;
BOX Beam welding in Wuxi JACK LHT and LHA models machines: (Fig.3)

Fig3 I H-beam Welding Machine 110_20211230141412

2. Application of Open Structure I H-beam Gantry SAW Welding Machine:

1) LHC column trolley machine is mainly used in automatic heavy duty H Beam Production Line. One set of LHC completes on one SAW welding seam on H Beam, 4 sets installed in total;
2) LHT T frame machine is applied in semi-automatic H Beam Production Line, implementing on SAW welding on two pieces of H Beam simultaneously, within one time of its operation; So, this machine is also applied in BOX Beam Production Line.

Technical View on LHC and LHT Open Structure I H-beam Gantry SAW Welding Machine

2 I H-beam Welding Machine 63 IMG_20211028_103954

1. LHC Column Trolley I H-beam Welding Machine

1. Application of LHC Model I H-beam Welding Machine

1) Operation Way and Site: LHC is usually 4 sets in a row, being installed at SAW welding zone of fully automatic H Beam Production Line. In this way, one piece of H Beam goes through the 4 sets of LHC, and with help from hydraulic drive 90° Overturning Machine, finished SAW welding on all of its 4 pieces of seam welding on H Beam. The entire process is implemented in automatic, operator just need to manage on operating panel of LHC, as shown in the left photo;
2) One Model Fitting for All: Same as LHT, there is only one model LHC: In theory, all web heights of T I H Beams can be welded in this open mechanical structure, from 200mm to 2000mm.

2. 4 Special Points of LHC Column Trolley Open Structure I H-beam Welding Machine:

Compared with LHA closed frame and LHT T frame machine:
1) No workpiece racks necessary for LHC model. Instead, T I H Beams are put onto group of hydraulic drive 60° Overturning Rack, as you check from the left hand photos;
2) Only 1 piece of SAW welding torch installed in one set of LHC machine. So, only piece of H Beam can be welded in LHC at any moment. This model is designed for automatic line use;
3) 4 Sets as a Group: The on site application of LHC I H-beam Welding Machine in automatic H Beam Production Line involves 4 sets of LHC working as a group. This is for completing H Beam 4 welding seams fabrication, with its one time flow through the line, without turning around;
4) Material handling in LHC model machine is safe and labor saving: Flipping and conveying workpiece is realized with 60° Overturning Rack and Steel Conveyor;
5) Balance is Important: The “downside” of LHC I H-beam Welding Machine is also obvious: It has single side inversed L shape, which is not as stable as LHT and LHA double sides acting structure I H-beam Gantry Welding Machine. So, during machine assembly at producer workshop, and official operation at customer site, be sure to always take care on balance of column trolley. This can be acquired by means of putting counterweight onto moving trolley during assembly at Wuxi JACK workshop, as shown in the left photo, and putting SAW welding machine onto moving trolley when the LHC machines are at customer workshop use.

3. Technical Parameters of LHC Column Open Structure I H-beam Welding Machine:

Operator Work Position	Stand on Motorized Moving Trolley
H Beam Web Height Range	200-2000mm
H Beam Web Thickness Range	6-60mm
H Beam Flange Width Range	200-800mm
H Beam Flange Thickness Range	6-100mm
H Beam Length	4000-15000mm
H Beam Max. Weight	20 Ton
H Beam Welding Position	45° fillet SAW Welding
H Beam SAW Welding Speed	240-2400mm/min., inverter control
Quantity of LHC in Automatic H Beam Production Line	4 sets / Line
SAW Welding Torch Quantity in one set of LHC	1 group / Set
H Beam Overturning Equipment	60° Overturning Rack, 3 pieces/ group

2. LHT T Frame I H-beam Gantry Welding Machine:

1. Technical Features of LHT Open T Structure I H-beam Gantry SAW Welding Machine:

Characteristic: LHT is the intermediate model between LHC column boom and LHA gantry moving models, common points with LHC and LHA both:
1) Mechanical main body of LHT has T shape structure. The 2 pieces of H Beams are laid at external sides of T frame during SAW welding. So, it has open structure;
2) Welding torch quantity: In one set of LHT, there are 2 pieces of welding torch. So, 2 pieces of T I H Beams can be welded simultaneously in the LHT machine;
3) Application Site: Same as LHA series, LHT model H-beam Gantry SAW Welding Machine works in semi-automatic H Beam Production Line, more flexible for on site layout;
4) Manual work on workpiece handling in LHT, including overturning and transportation of BOX H Beams are also toilful, which needs special attention for making sure operator safety and workpiece protection;
5) One Model for All Sizes Workpieces: LHT has T shape open style mechanical main body, no restriction on H Beam web height.

2. Uniqueness of LHT I H-beam Gantry SAW Welding Machine:

1) One machine with triple use: Benefitting from its mechanical T frame structure, applicable workpieces is not confined to T I H Beam, BOX Cross Beams are also available for being fabricated in the LHT;
2) Besides, other long length and relatively small cross section size steel workpieces, such as long pipe/ pole/ lamp post, can also be welded with this LHT models open structure H-beam Gantry SAW Welding Machine;
3) Welding mode is not confined to SAW welding also. Other common seen welding technique, for example, CO2 GMAW/ Strap cladding (Built up welding), can also be applied in the machine.

3. Technical Parameters of LHT T Frame I H-beam Gantry SAW Welding Machine:

Applicable Workpieces	H Beam, BOX Beam, Lamp pole, Long Pipe
H Beam Web Height	200-2000mm
H Beam Web Thickness	6-60mm
H Beam Flange Width	200-800mm
H Beam Flange Thickness	6-40mm
BOX Beam Edge Max. Width	1200mm
BOX Beam Edge Max. Thickness	20mm
Pipe Max. Diameter	Φ1,500mm
Pipe Max. Wall Thickness	20mm
Workpiece Length	4,000-15,000mm
Welding Mode	Single Arc/ Twin Arc/ Tandem Arc SAW; CO₂ GMAW/ Built Up Welding
Welding Seam Form	Back Welding, Longitudinal Welding
Welding Seam Type	Internal/ external longitudinal and circumferential welding
Quantity of SAW Welding Torch in 1 set of LHT Machine	1-2 Pieces/ Set
Adjustable Welding Speed	100-1000/ 240-2400 mm/min., inverter control, 10 times speed regulation
Mechanical T Frame Idle Moving Speed	3200 mm/min.

2 I H-beam Gantry Welding Machine 5 IMG_20200701_082021

Related Equipment of I H-beam Welding Machine

Below machines and equipment are working partners with I H-beam Welding Machine, in the field of H Beam and other steel structure workpiece production:

Z20 H Beam Assembly and Tack Welding Machine

HB1500 Automatic H Beam Welding Production Line

YTJ80 Heavy duty Hydraulic H Beam Straightening Machine for Flange

HYJ40 Motor Drive H Beam Flange Straightening Machine

YF1520 Motorized Movable Hydraulic H Beam 180° Turntable

CNC-CG4000 CNC Strip Plasma Flame Cutting Machine

CNC-DX1520 CNC BOX H Beam End Face Milling Machine

SXBJ-18 Double Heads Long Stroke Edge Milling Machine

CNC-DX1520 CNC BOX H Beam End Face Milling Machine

PHJ15 Three in One I H Beam Assembly Welding Straightening Machine

PHJ20 Model 3 in 1 H Beam Assembly Welding Straightening Machine

CNC-CG4000 CNC Strip Flame Cutting Machine

FAQ on Wuxi JACK Open Mechanical Frame I H-beam Gantry Welding Machine

Below are some typical questions raised by customer to Wuxi JACK engineers on I H-beam Welding Machine during the past 17 years, from year 2009 to end of year 2025:

Q What does “Open Mechanical Structure” refer to for I H-beam Welding Machine?
A
1. 1) This means: Workpieces (BOX I H Beams) are put onto external open section of mechanical main body of machine, thus “no restriction” on size (height) of workpieces, especially height;
2. 2) In LHC model, H Beam is laid on hydraulic drive 60° Overturning Racks alongside the LHC moving trolley. This motorized moving trolley moves along the H Beam during SAW welding;
3. 3) In LHT model, the 2 pieces of H Beams are laid on the 2 arrays of supporting racks, which are at external both lateral sides of machine;
4. 4) Customer determine and select on which type of I H-beam Welding Machine is better for operation, depending on H Beam specifications / process technology design/ workshop layout plan/ budget level of customer facility.
Q What are Advantages of Open Frame I H-beam Gantry SAW Welding Machine?
A
1. 1) One Size fits for All: Because there is no confinement on placement of workpiece (BOX I H Beams) in open structure, so, size range of applicable workpieces has great extensive range than enclosed gantry frame types machines. In other words, when customer plan to produce new batch of H Beam, they do not need to fret over whether the current open structure I H-beam Welding Machine is applicable or not;
2. 2) So, any sizes of H Beam, from the smallest web height 200mm, to the max. web height 2000mm, can be placed into LHC or LHT open frame machines;
3. 3) Besides, other common seen steel structure workpieces, especially BOX Beam, can also be welded in open structure machines;
4. 4) When customer plan to introduce new types of workpieces, say, long pipe/ post... the existing open structure machine can also be used without or with very few modifications on the existing machine.
Q What are Welding Mode and Operation in Open Structure H-beam Gantry SAW Welding Machine?
A
1. 1) Major Welding Mode: 45° fillet SAW welding is the No.1 choice to be implemented in all models of machine. And, among this, majority is with single arc SAW welding; When customer need higher welding velocity, or thickness of H Beam flange and web are larger than 60mm, tandem arc SAW should be used;
2. 2) Promise Heavy Welding: The strongest point of sole purpose I H-beam Welding Machine is to get solid welding seam formation in fabricated BOX T I H Beams, which guarantees sufficient penetration depth/ broad cover face of formed welding seam on finished workpieces;
3. 3) Mature Welding Technique: SAW and other types of welding is managed by means of professional welding power supply (Single/ twin/ tandem arc welding machines), together with system of assistant welding operation, including welding torch position detect and control, welding wire feeding and straining unit, etc.;
4. 4) Welding velocity is managed with A.C. inverter, and displayed real time intuitively in digital meter of machine operating panel.
Q What are Supply Range of Various types of I H-beam Welding Machine, including LHA series Gantry Frame, LHC model Trolley Column, and LHT model Open Structure?
A
1. 1. This is a good question, that often neglect by customer and supplier company, and sometimes cause controversy. For example, in end of December 2025, when a Vietnam customer communicated with Wuxi JACK on LHA model H-beam Gantry SAW Welding Machine, we forgot to remind customer that, the 18m long parallel rails for gantry movement is not included supply range, because unlike rails of CNC Flame Plasma Cutting Machine, which need to be machined, for rails of I H-beam Welding Machine, the parallel rails do not need to be machined, do, it is not in scope of supply. This is common practice, but need to confirm with customer when making quotation;
2. 2. Basically, supply scope of all types of I H-beam Welding Machine:
1. 1) Mechanical main frame, including motor drive moving trolley for LHC, gantry frame for LHA, and T frame open structure for LHT;
2. 2) SAW welding system, including different types of welding machines, welding torch mechanism, supplementary welding units, flux conveying and reuse machines;
3. 3) Drive and transmission system on mechanical main frame;
4. 4) Electric control system of machine;
1. 3. Unless specifically designated by customer and negotiated accordingly, supply range of I H-beam Welding Machine do not include:
1. 1) 2 arrays of triangular H Beam support rack;
2. 2) Parallel rails for frame movement;
3. 3) Cable overhang racks;
But we provide drawing of these items for customer producing these items. The reason we do not provide these items is, it is easy to produce, but have large size and heavy weight, which will greatly increase logistic cost of I H-beam Welding Machine. To save freight charge on the machine for customers, we exclude these items from supply range of the machine.
Q How Many Operators are Necessary for Running on I H-beam Gantry Welding Machine?
A This is another important question customer concerns during machine purchase analysis, and actually differs based on practical condition at customer site. the major factors affecting number of operators include:
1. 1) Model and design of machine. For example, for LHA series H-beam Gantry SAW Welding Machine, there are 2 branches of: LHAC lateral operating type, which usually need 2 operators work on one machine; While one operator is sufficient for working on LHAZ middle operating type;
2. 2) Quantity of machines on site: Especially for I H-beam Welding Machine, very often customer purchase more than one set of machine: For LHC model at automatic H-beam production line, usually 4 sets in a line; For LHA series gantry frame moving and LHT model open structure T frame I H-beam Gantry Welding Machine, one or two sets are installed in H Beam production workshop. Under ideal condition, one operator can take care on operation of 2 machines simultaneously, which can raise productivity;
3. 3) Operator Proficiency: This is another controversy sometimes happened during business exploration. For example, also in end of December 2025, the Vietnam customer discussed with Wuxi JACK engineer on how many operator is necessary for operating on PHJ and ZHJ series 3 in 1 I H-beam Welding Machine. The Vietnam customer questioned on whether only one operator is capable of working on one set of the 3 in 1 machine, he told us that, in Vietnam factories, customer manager arrange on 2 operators to work on the machine: One as lead and one as main; On the other hand, from Wuxi JACK perspective, if operator is proficient, only one people is sufficient for managing on the 3 in 1 I H-beam Welding Machine.

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I H-beam Welding Machine Blogs

Data Sheet and List of H Beam Production Line Equipment
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Technical Analysis on Steel Structure Overturning Equipment
1. Brief on this Article on Steel Structure Overturning Equipment: 2. Demand on Steel Structure Flipping Equipment: 3. Classification on Steel Structure Overturning Equipment: 4. Characteristics and Design of Steel Structure Flipping Equipment: 5. Apply of Steel Structure Overturning Equipment: Read More
A set of Wuxi JACK FXBJ-18 Heavy duty Edge Milling Machine Accepted at Customer Site
Usage of the FXBJ-18 Heavy duty Large Size Edge Milling Machine; Specialty of the FXBJ-18 Heavy duty Large Size Edge Milling Machine; Technical View on the FXBJ-18 Heavy duty Plate Edge Beveling Machine; Wuxi JACK Strength on Developing Conventional and Special Large Size Heavy duty Edge Milling Machine Read More

Wuxi JACK Open Structure I H-beam Welding Machine,

Fabricating Big Size BOX H Beam with High Efficiency

Complete Line of Wuxi JACK I H-beam Gantry Welding Machine

Models of Wuxi JACK H-beam Gantry SAW Welding Machine:

1, LHT model open structure I H-beam Gantry Welding Machine works at customer facility:

2, LHC model Column Trolley type I H-beam Welding Machine:

PHJ and ZHJ Models 3 in 1 I H-beam Welding Machine:

Newly Produced H-beam Gantry SAW Welding Machine in Year 2025 by Wuxi JACK

1. 4 Sets of LHT model I H-beam Welding Machine:

2. 12 Sets of LHC model I H-beam Welding Machine:

Working Videos of Wuxi JACK Different Types I H-beam Welding Machine

Major Technical Parameters of Wuxi JACK LHT Model Open Structure I H-beam Gantry Welding Machine

Value of Open Structure I H-beam Welding Machine for Customer

A. Operation Mode of H-beam Gantry SAW Welding Machine:

1. Applicable Workpieces and Welding Technique in I H-beam Gantry Welding Machine:

2. Welding Technique Adopted in I H-beam Gantry Welding Machine:

B. Advantages and Operation Way of I H-beam Gantry Welding Machine:

4. Operation Manner of Gantry Moving I H-beam Welding Machine:

C. Model Variation on I H-beam Gantry SAW Welding Machine:

1. Mechanical Body of I H-beam Welding Machine:

2. Three Types of Mechanical Structure I H-beam Gantry Welding Machine:

Value Chain of Wuxi JACK I H-beam Gantry Welding Machine

Producing on I H-beam Welding Machine

Technical Superiority of Wuxi JACK I H-beam Gantry SAW Welding Machine

1. Welding Seam Tracer of I H-beam Welding Machine:

2. Ingenious Design and Delicate Workmanship of Welding Seam Tracker of Wuxi JACK I H-beam Gantry Welding Machine:

3. Operation Manner of Welding Seam Tracker in Wuxi JACK I H-beam Welding Machine:

Application of Open Structure Gantry Frame I H-beam Welding Machine

1. Mechanical Structure and Workpieces of T Frame I H-beam Gantry Welding Machine:

2. Application of Open Structure I H-beam Gantry SAW Welding Machine:

Technical View on LHC and LHT Open Structure I H-beam Gantry SAW Welding Machine

1. LHC Column Trolley I H-beam Welding Machine

1. Application of LHC Model I H-beam Welding Machine

2. 4 Special Points of LHC Column Trolley Open Structure I H-beam Welding Machine:

3. Technical Parameters of LHC Column Open Structure I H-beam Welding Machine:

2. LHT T Frame I H-beam Gantry Welding Machine:

1. Technical Features of LHT Open T Structure I H-beam Gantry SAW Welding Machine:

2. Uniqueness of LHT I H-beam Gantry SAW Welding Machine:

3. Technical Parameters of LHT T Frame I H-beam Gantry SAW Welding Machine:

Related Equipment of I H-beam Welding Machine

FAQ on Wuxi JACK Open Mechanical Frame I H-beam Gantry Welding Machine

Q What does “Open Mechanical Structure” refer to for I H-beam Welding Machine?

Q What are Advantages of Open Frame I H-beam Gantry SAW Welding Machine?

Q What are Welding Mode and Operation in Open Structure H-beam Gantry SAW Welding Machine?

Q What are Supply Range of Various types of I H-beam Welding Machine, including LHA series Gantry Frame, LHC model Trolley Column, and LHT model Open Structure?

Q How Many Operators are Necessary for Running on I H-beam Gantry Welding Machine?

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I H-beam Welding Machine Blogs