Box Girder Bridge Cranes

Handling Systems specializes in the fabrication of both single box girder, also known as Monobox, cranes and double box girder cranes. These box girder cranes offer remarkable versatility due to their favorable weight-to-span ratio, which can minimize the dimensions of the necessary runway and building infrastructure. Ideal for settings that demand resilient and durable lifting solutions, our box girder cranes are crafted by welders certified under AWS D1.1 and D14.1 standards and are custom-designed to meet your specific application needs.

When dealing with heavy loads and lengthy spans, the strength and structural integrity of the beam are crucial factors. Box girders excel in these scenarios due to their robust construction and higher support capacity relative to profile girders. Because they are custom-fabricated for specific applications, box girders offer a wide array of sizes and designs. To assess whether a box girder is suitable for your needs, crane builders take into account various key elements like
load and span.

Shaped like rectangles or trapezoids, box beams feature a minimum of two webs and two flanges, and often include internal gussets that bolster the hollow structure of the beam. Their multiple vertical webs lend considerably more strength relative to the girder’s height. The compact nature of box girders makes them ideal for maximizing headroom in heavy-duty applications.

Gusset: These are secondary plates connecting the flanges to the webs or end joints, serving as brackets to enhance the overall strength of the girder.

Box beams for double-girder cranes predominantly come in two styles:

Standard or American Box Beam:

In this design, the trolley rail is centrally positioned on the top of the box, optimizing the economical use of steel in the girder fabrication.

Torsional Box Beam:

Here, the trolley rail is located above the inner web of each beam in a double-girder crane. This setup exerts more pressure on the inner web as opposed to the outer one but allows the hoist and trolley to sit between the girders for a more compact design and improved headroom. Additionally, as the load shifts from the girder to the end truck, it’s further from the wheel, reducing wheel loading. This often results in smaller end trucks or runway rails and minimizes wear over the crane’s lifespan.

Unsure which girder suits your upcoming project best? Reach out to us online or call 888.352.1213 to consult with a crane enthusiast about your specific requirements.

Additional Info

Gusset: These are secondary plates connecting the flanges to the webs or end joints, serving as brackets to enhance the overall strength of the girder.

Box beams for double-girder cranes predominantly come in two styles:

Standard or American Box Beam:
In this design, the trolley rail is centrally positioned on the top of the box, optimizing the economical use of steel in the girder fabrication.

Torsional Box Beam:
Here, the trolley rail is located above the inner web of each beam in a double-girder crane. This setup exerts more pressure on the inner web as opposed to the outer one but allows the hoist and trolley to sit between the girders for a more compact design and improved headroom. Additionally, as the load shifts from the girder to the end truck, it’s further from the wheel, reducing wheel loading. This often results in smaller end trucks or runway rails and minimizes
wear over the crane’s lifespan.

As a guideline, for applications involving large load capacities or crane spans exceeding 60 feet, Handling Systems advises opting for box girders for optimal support. Both CMAA and ASTM provide industry-standard specifications on factors like deflection, load capacity, and steel composition to maintain consistent safety levels across the sector.

11 Year Warranty

HSI’s 11 year warranty is the best in the industry.

What Products Are Covered?

• Manual Rotation Jib Cranes
• Manual Steel Gantry Cranes
• Defects in material and workmanship

The Fine Print:

Handling Systems International, Inc. (known as H.S.I.) warrants manual push/pull Jib and Gantry Crane products it manufactures against defects in material or workmanship for a period of eleven years from date of receipt by purchaser or customer. This warranty does not cover failure or defect in paint or material finish. This warranty does not cover failure or defect caused by operation in excess of recommended rated capacities, misuses, negligence or accident, and alteration or repair of any kind not authorized by H.S.I. H.S.I. systems shall not be modified after manufacture without written authorization of H.S.I. Any field modifications made without written authorization of H.S.I. shall void all H.S.I.’s warranty obligation. H.S.I. agrees to furnish the same or substantially similar replacement part (new or repaired) free of charge, providing the buyer gives immediate written notice of alleged defects, and if requested by H.S.I., returns the defective parts to the factory, for H.S.I.’s inspection and examination. Purchaser or end user shall be solely responsible for all freight and transportation costs incurred in connection with any warranty work provided by H.S.I. hereunder. H.S.I. will not be liable for any loss, injury or damage to persons or property, nor for damages of any kind resulting from failure or defective operation of any materials or equipment furnished hereunder. H.S.I. shall not be liable under any circumstances for any incidental, special and/or consequential damages whatsoever, whether or not foreseeable, including but not limited to damages for lost profits and all such incidental, special and/or consequential damages are hereby also specifically disclaimed. This warranty applies only to H.S.I. equipment or materials which, after our inspection, are determined to be defective either in material supplied or workmanship performed by H.S.I. Where equipment is furnished by H.S.I. but not of its manufacture, H.S.I.’s liability is limited to such adjustment as the actual manufacturer makes to H.S.I. H.S.I. will not be liable for the cost of repairs, alterations, or replacements or any expense connected therewith made or incurred by the purchaser or his agents or employees, except upon written authority from H.S.I. This warranty is personal to purchaser only and applies only to equipment which purchaser has properly operated and maintained in accordance with H.S.I.’s written instructions. H.S.I. assumes no liability for any consequential damages suffered through the use of loss of use of its equipment. This constitutes H.S.I.’s sole warranty with respect to the equipment and material manufactured by itself. H.S.I. makes no other warranty of any kind whatsoever, expressed or implied, and all implied warranties of merchantability and fitness for a particular purpose which exceed the aforementioned obligation are hereby disclaimed by H.S.I.

11 Year Warranty

NIKOrail’s 11 year warranty is the best in the industry.

What Products Are Covered?

• Manual Workstation Enclosed Track Cranes
• Manual Enclosed Track Jib Cranes
• Defects in material and workmanship
• Wear parts (trolley and end truck wheels only)

The Fine Print:

NIKOrail by Handling Systems International, Inc. (known as NIKOrail) warrants manual push-pull Enclosed Track Workstation Crane and Jib Crane products it manufactures against defects in material or workmanship for a period of eleven years from date of receipt by purchaser or customer. This warranty is inclusive of NIKOrail crane trolley and end truck wheels. This warranty does not cover failure or defect caused by operation in excess of recommended rated capacities, misuses, negligence or accident, and alteration or repair of any kind not authorized by NIKOrail. NIKOrail systems shall not be modified after manufacture without written authorization of NIKOrail. Any field modifications made without written authorization of NIKOrail shall void all NIKOrail’s warranty obligation. NIKOrail agrees to furnish the same or substantially similar replacement part (new or repaired) free of charge,
providing the buyer gives immediate written notice of alleged defects, and if requested by NIKOrail, returns the defective parts to the factory, for NIKOrail’s inspection and examination. Purchaser or end user shall be solely responsible for all freight and transportation costs incurred in connection with any warranty work provided by NIKOrail hereunder. NIKOrail will not be liable for any loss, injury or damage to persons or property, nor for damages of any kind resulting from failure or defective operation of any materials or equipment fur-nished hereunder. NIKOrail shall not be liable under any circumstances for any incidental, special and/or consequential damages whatsoever, whether or not foreseeable, including but not limited to damages for lost profits and all such incidental, special and/or consequential damages are hereby also specifically disclaimed. This warranty applies only to NIKOrail equipment or materials which, after our inspection, are determined to be defective either in material supplied or workmanship performed by NIKOrail. Where equipment is furnished by NIKOrail but not of its manufacture, NIKOrail’s liability is limited to such adjustment as the actual manufacturer makes to NIKOrail. NIKOrail will not be liable for the cost of repairs, alterations, or replacements or any expense connected therewith made or incurred by the purchaser or his agents or employees, except upon written authority from NIKOrail. This warranty is personal to purchaser only and applies only to equipment which purchaser has properly operated and maintained in accordance with NIKOrail’s written instructions. NIKOrail assumes no liability for any consequential damages suffered through the use of loss of use of its equipment. This constitutes NIKOrail’s sole warranty with respect to the equipment and material manufactured by itself. NiKOrail makes no other warranty of any kind whatsoever, expressed or implied, and all implied warranties of merchantability and fitness for a particular purpose which exceed the aforementioned obligation are hereby disclaimed by NIKOrail.

Design Standards

All Handling Systems International Jib Cranes are structurally designed in accordance with the AISCSteel Construction Manual.

All Handling Systems International Cranes have a design factor of 15% of the allowable capacity for hoist weight and 25% of the allowable capacity for impact.

All designs meet AISC standards as they pertain to jibs and overhead cranes. All of our cranes are in accordance with OSHA specification 1910.179. All design and manufacturing is done in accordance to ANSI specification B30.11 as they apply to jib cranes and overhead cranes. All jib and gantry cranes are built to CMAA specification No. 74. All workstation bridge cranes are built to MMA MH27.2.

Fabrication Standards

All welding of Handling Systems International cranes adheres to the American Welding Society’s (AWS) standards: D1.1 for steel and D1.2 for aluminum. All welders are AWS certified.

Material Standards

All steel beams and shapes used by Handling Systems International are a minimum of ASTM A-36 designation. All steel pipes are ASTM A-53 Grade B. All steel tubing are ASTM A-500 Grade B. All aluminum used meets ASTM B308 for 6061-T6 aluminum.

Painting Procedure

All finished cranes are wire wheel cleaned and wiped down with a solvent solution paint prep to remove any standing rust, oil, or dirt that may impede in paint adhesion. Indoor and outdoor paint finishes are applied with an air-assisted wet paint sprayer. Standard indoor paint consists of a one to two coat, 2 mil +/- application with a DTM water reducible yellow enamel. Standard outdoor paint finish consists of a one coat DTM primer with two coats of water reducible safety yellow acrylic enamel.

Deflection

HSI manufactures cranes to a specific deflection value, however, the value of this formula is theoretical and will be increased during field load tests due to variables such as: installation, foundation rigidity, or the standard variation in thickness tolerances for the piping, tubing, steel plate and sheet metal. Some variation above (or below) deflections defined by the manufacturer is considered normal. When measuring deflection for safety standards, the deflection is measured at 100 percent capacity (L (span in inches)/100 for freestanding (350), L (span in inches)/150 for wall cantilever (313), free standing (351), and mast type (314), and L/450 for wall bracket (311) cranes), rather than the 125 percent load test. According to ANSI Standards (ANSI/ASME B30.2), “Standard deflection must be measured with a load of 100 percent of the rated capacity”. During load testing at 125% deflection values will thus be greater than published deflection. Using this formula, ‘L’ (meaning Length or span) measured in inches / 100, 150, or 450 will result in a theoretically calculated deflection. Load tests at 125% of rated capacity plus variables listed above can result in up to twice the theoretical deflection value.

Inspect entire system annually or more frequently as defined by OSHA 1910.179. Inspection must be performed by a qualified person. Failure to do so may cause serious injury or death.
This equipment, used as a crane, is not in any way designed for lifting, supporting, or transporting humans. Failure to follow specified load limitations can result in serious bodily injury or death.
The rated load of the hoist as marked on the hoist must not exceed the rated capacity of the jib as labeled on the boom. Do not install a hoist with a capacity greater than that of the jib.
It is solely the customer’s responsibility to provide suitable mounting supports for the jib crane. HSI recommends that the customer consult a qualified professional architect or engineer in your local area to determine the adequacy of the building support. There should be no deviation from the recommended foundation size or installation recommendations without first consulting a qualified professional. Failure to check this item can result in serious bodily injury or death.
Do not impact end stops at speed. Only impact end stops with caution.
Never use end stops for repetitive boom impacts.
To prevent trolley from running off of the boom, do not operate crane without end stop bolt firmly secured in place on the end of the boom.
Do not operate hoist or crane if cotter pins are not in place and properly bent over on both sides of hoist trolley. Check regularly that the cotter pins are in place and securing the hoist on the hoist trolley.
Inspect jib for missing or broken parts before operating.
Do not adjust or disassemble crane when jib is under load.
When moving jib, position the load in the center of the boom.
Be certain the load is directly beneath boom before load is lifted. Do not pull sideways on crane.
Ensure the load is not attached to the floor and remove any obstacles that impede lifting.
Adjustments and/or repairs should be made in an area where it will have the least interference with operation.
Never stand under jib when disassembling crane.