When inquiring about bridge cranes, many buyers and factory engineers will find that the quotations provided by different manufacturers vary greatly, and the configuration of the proposed solutions is difficult to directly compare.The reason for this situation is often that the project details are not detailed enough or the job requirements are not clear enough, resulting in manufacturers can only make estimates based on different assumptions.If you can provide accurate information at the beginning of the inquiry, you can ensure that each quotation effectively reflects the actual lifting requirements, workshop working conditions and technical requirements, so that you can more easily compare the various options and select the most suitable bridge crane for the project. Crane.
What Basic Information Is Required for an Overhead Crane Quote?
The basic project information is the first-hand information of the manufacturer’s preliminary judgment of the crane plan. If any item is missing, the quotation will have a large deviation.
Lifting capacity
The rated lifting weight is the primary parameter for the selection of Henan Mine Crane manufactured bridge cranes. It is necessary to clarify the maximum carrying weight of the equipment and strictly distinguish between the rated load and the weight of the workpiece being hoisted daily in the workshop.Don’t just roughly mark about 5 tons or 10 tons. Be sure to confirm the weight of the conventional workpiece and indicate whether there is a need for intermittent heavy-duty lifting.You also need to confirm in advance whether you need a double-hanging point structure of the main and auxiliary hooks. In large-tonnage operation scenarios, the combination of the main and auxiliary hooks will directly change the structure design and production cost of the whole machine.Only by obtaining accurate lifting weight data can engineers initially finalize the specifications of the main beam, lifting trolley and hoist mechanism, so as to avoid fluctuations in the quotation caused by later changes in the plan.
Crane type
Bridge cranes are divided into different categories such as single-girder bridge cranes, double-girder bridge cranes, European-style bridge cranes, and explosion-proof bridge cranes. There are obvious gaps between different models in terms of structural weight, carrying capacity, top space occupation, and cost.You need to clarify the direction of project selection, whether it is a general single-beam crane for workshops or a double-beam bridge crane for heavy-duty operations.Whether you need a low-headroom hoist, or special models such as metallurgical and explosion-proof.Once the crane type selection judgment is wrong, the subsequent complete design plan and supporting parts selection will fail, resulting in the quotation completely losing its reference significance, and the project communication cycle will be prolonged.
Project location
The location of the project will directly determine the transportation plan, on-site installation conditions, and local special equipment acceptance specifications.Different countries and regions have different manufacturing standards, electrical certification, and on-site inspection requirements for lifting equipment.Overseas projects also need to confirm the location of the destination port and inland road transportation conditions, so as to facilitate manufacturers to calculate freight and export packaging plans, and simultaneously match local voltage levels and safety regulations to prevent equipment from being unable to meet local market access requirements after production is completed.Providing the project location in advance can also evaluate the feasibility and related costs of after-sales on-site service.
Installation or replacement
At the inquiry stage, it is necessary to distinguish whether the project is the installation of brand new equipment or the demolition and replacement of the old crane.For new plant projects, the plant structure and track foundation can be planned and designed simultaneously with the crane, making the construction process smoother.For the replacement project of old equipment, it is necessary to fully consider the original cow legs, track load-bearing and on-site space constraints, and evaluate whether the old main beam and old electromechanical components need to be removed.The demolition of old equipment will generate additional labor and safety protection costs. The quotation range corresponding to the two project scenarios is very different, and the unclear information can easily cause the quotation to be missed.
What Workshop Dimensions Should You Provide?
The size parameters of the plant directly determine the overall design of the crane. It is the most likely information to be missed in the inquiry. It is recommended to give priority to the provision of plant drawings. When there are no drawings, the following data will be accurately measured.
Building span and runway length
The span of the plant refers to the distance between the centerline of the support of the legs on both sides, which is the effective span of the Henan Mine Crane manufactured bridge crane.The total length of the track represents the laying length of the running track of the cart, which determines the maximum walking distance of the cart.The larger the span of the main beam, the more steel plate materials are required, and the cost of the equipment body will increase.The total length of the track directly affects the purchase and consumption of track steel, sliding contact wires, and power supply cables.These two geometric parameters are the core basis for quotation accounting. Even if the parameter error is only a few tens of millimeters, it will affect the main beam cutting and track matching plan, and ultimately cause quotation deviation.
Lifting height
The lifting height is defined as the vertical distance from the lowest lifting position of the hook to the highest lifting position.Many customers are accustomed to directly using the total height of the plant to estimate, and often ignore the vertical space occupied by the gourd body itself.The higher the lifting height, the larger the dimensions of the wire rope reel and hoist mechanism, and the height of the whole machine will increase synchronously, and the production cost will also rise.If the estimation of this parameter is not accurate, after the delivery of the equipment is completed, there will be a problem that the hook cannot reach the lifting height required for production, and it needs to be reworked and retrofitted.Therefore, when inquiring, be sure to provide effective lifting height data measured on site.
Headroom and installation space
The headroom height and installation space represent the remaining vertical space at the top of the plant that can be used to arrange the crane.For low-rise factory scenes, low-clearance gourds are preferred to minimize the top occupation of the equipment.If the top pipes, ventilation pipes, and bridges of the plant are dense, it is necessary to reserve space for equipment installation and later maintenance operations in advance.Once the on-site space is estimated to be insufficient, there will be situations where the selected model cannot be installed in the field, and high plant renovation costs will be required in the later stage.Providing on-site photos to match the measured dimensions can help engineers quickly judge the adaptability of the model.
Runway and support structure
Track and support structure information, including track model, track pressure plate, embedded parts, and plant leg load-bearing capacity.For the new plant project, the manufacturer can simultaneously complete the design of the rail steel structure.For the renovation project of the old factory building, the bearing capacity of the original concrete bull legs or steel structure columns must be verified to determine whether structural reinforcement treatment is required.When the carrying capacity of the leg of cattle is insufficient, even if all the indicators of the crane body meet the standards, the project cannot pass the acceptance of special equipment.Provide the original steel structure inspection report when inquiring, which allows the quotation to include the reinforcement project in the evaluation scope, avoiding hidden additions.
How Do Operating Conditions Affect Overhead Crane Pricing?
For bridge cranes of the same tonnage and the same span, the working conditions are different, and the price gap can reach up to 30% or more. The working conditions are a key variable that cannot be ignored when inquiring.
Duty class and frequency
The working level and frequency of use of bridge cranes are divided into A1-A8 levels according to ISO standards, corresponding to different daily operating hours and the number of lifting cycles.A3 belongs to the light-load level, which is mostly used for equipment maintenance, and the number of daily hoisting is small.A5 is the most commonly used level in general workshops.A6 and A7 are high-frequency heavy-duty, suitable for continuous operation scenarios in prefabricated parts factories and steel workshops.The higher the level of work, the stronger the thickness of the main beam steel plate, the configuration standards of the reducer, motor, and brake system, and the higher the procurement cost.If the actual working level is underestimated, the equipment is prone to frequent failures after it is put into use, which greatly shortens the service life of the whole machine and brings higher long-term maintenance costs.
Load type
The types of lifting materials need to be distinguished from ordinary steel, molds, castings, or high-temperature metallurgical workpieces, flammable and explosive materials, and powdery corrosive materials.Ordinary workpieces only need to be equipped with standard hooks.High-temperature workpieces should be equipped with heat insulation protection and metallurgical special gourds.In the case of dangerous goods hoisting, the explosion-proof configuration of the whole machine is required.Different load types, raw material selection and safety protection schemes are completely different, which will directly affect the quotation of the whole machine.When inquiring, describe the shape, temperature, and chemical properties of the suspended object in detail so that manufacturers can choose matching parts to avoid budget waste caused by insufficient safety redundancy or excessive configuration.
Operating environment
The operating environment includes indoor and outdoor scenes, and at the same time confirm whether there are special conditions such as dust, moisture, corrosive gases, and high and low temperatures on the site.The dust workshop needs to improve the dust protection level of the motor.In the chemical corrosion environment, the whole machine should be anticorrosive sprayed, and stainless steel accessories should be selected.Cold-resistant lubricants and low-temperature-resistant electrical components must be replaced in low-temperature areas.Henan Mine Crane manufactured outdoor bridge cranes also need to be equipped with rainproof, sunscreen, and windproof anchoring devices.Such special environmental requirements will bring additional customization costs. If the inquiry stage is not stated, the later equipment transformation will generate a lot of additional expenses.
Lifting and travel speeds
The lifting and operating speed are divided into two schemes: fixed speed and frequency conversion speed regulation.Ordinary material handling workshops choose a fixed-speed plan, and the procurement cost is lower.In precision assembly and mold hoisting scenarios, frequency conversion and speed regulation are required to achieve smooth start and stop and reduce the impact of workpiece shaking.The frequency conversion system will increase the cost of the electronic control part, but it can reduce the impact and wear of the structure and extend the life of the equipment.When inquiring, it is necessary to clarify the lifting speed of the hook, the horizontal running speed of the trolley, and the vertical walking speed of the trolley. The manufacturer matches the corresponding motor and drive scheme according to the demand to ensure the stability of the hoisting operation, and at the same time give an accurate electronic control quotation.
What Technical Specifications Should Be Confirmed Before Quotation?
After the basic dimensions and working conditions are determined, it is necessary to confirm the core technical configuration of the crane. Different configurations have significant differences in equipment quality, quotation, and service life.
Girder configuration
The structure configuration of the main beam is divided into two types: single main beam and double main beam.The single beam has light weight and high cost performance, which is suitable for conventional lifting of small and medium tonnage.The double-beam structure has stronger rigidity and is suitable for working conditions with large tonnage, high working level and high lifting height.At the same time, it is necessary to confirm the main beam steel grade, welding process standards, surface rust removal and painting requirements, and export projects have higher standards for paint film thickness and anticorrosive grade.The main beam is the core load-bearing component of the bridge crane. The material and process standards are different, and the cost gap is obvious. The requirements of the main beam are clarified when inquiring, so that manufacturers can provide horizontally comparable solutions.
Hoist and trolley
The hoist and trolley mechanism are the core operating components of the bridge crane, which are divided into two categories: wire rope electric hoist and chain hoist.European-style gourds and domestic standard gourds differ in operating noise, maintenance cycle, and purchase price.The lifting trolley is divided into manual trolley and electric trolley. It is necessary to confirm the driving form of the trolley and whether the core components are original brand parts or domestic accessories.The brand of the core parts directly affects the quotation of the whole machine and the later maintenance cost. Determining the configuration of the hoist and trolley during the inquiry can effectively avoid the inconsistent grade of the parts in the quotation, resulting in price comparison distortion.
Power supply and controls
The power supply method and the control system need to confirm the on-site power supply voltage and frequency, and the power supply form is selected from the sliding contact line power supply or the cable reel power supply.The operation mode can be selected from the handle, wireless remote control, and cab operation.Some automated production lines also require PLC linkage and remote operation monitoring functions.The selection of components and on-site wiring schemes corresponding to different electronic control schemes are different. Overseas projects must confirm the local voltage standard in advance to prevent the electronic control system of the equipment from being unable to adapt to the site.The cost changes caused by differences in electronic control schemes can easily be ignored by purchasing personnel when comparing quotations.
Safety features
The safety device is a necessary configuration for the Henan Mine Crane manufactured crane, and there are a number of optional upgrade configurations at the same time.The standard configuration generally includes an overload limiter, an upper and lower limit switch, a buffer, and a stroke limit.The upgraded configuration includes laser anti-collision, wire rope condition monitoring, brake protection, real-time load monitoring, and emergency shutdown system.The safety configuration list is different, and the final quotation will be significantly different. When purchasing personnel compare multiple quotations, they must check whether all the safety accessories are included one by one.Low-cost plans often delete safety accessories, and install them separately in the later stage, but the overall cost is higher, and there are still safety risks.
What Additional Costs Should Be Included in an Overhead Crane Quote?
Many customers compare prices only to compare the price of the crane host, ignoring the cost of supporting projects, and only when the project landed did they find that the budget was seriously overspent.A complete quotation should clearly state all supporting items.
Runway and steelwork
Track and steel structure engineering, including crane track, track pressure plate, embedded parts, beef leg reinforced steel structure and other supporting components.The basic quotation of many manufacturers only includes the crane body, and the track and supporting steel structure need to be accounted for separately.For new-build plant projects, the amount of steel structure engineering is large, which accounts for a relatively high part of the total project budget.When inquiring, it is necessary to confirm whether the quotation includes a full set of track materials, steel structure processing and reinforcement plans, and include this part of the cost in the budget evaluation to prevent the steel structure project from generating large additional expenditures after the host is determined.
Installation and commissioning
Installation and commissioning services cover on-site hoisting, equipment assembly, electrical wiring, no-load and load testing, and commissioning of the whole machine.Overseas projects can choose factory technicians to go to the site to guide the installation, or provide complete installation drawings for the local construction team to complete the operation.At the same time, confirm whether the quotation includes special equipment inspection materials and on-site acceptance services to avoid additional commissioning and inspection costs in the later stages of the project.The workload of installation and commissioning is greatly affected by on-site conditions. The scope of service can be clarified in advance so that the quotation can fully cover all the labor costs in the implementation phase of the project.
Transportation and packaging
Transportation and packaging costs, domestic projects are mainly road transportation.Export projects require fumigation, wooden box packaging, container loading, and short-distance port transshipment.The heavy-duty main beam is an ultra-long and over-limit cargo, which will result in additional over-limit transportation costs.The quotation of foreign trade orders needs to distinguish between FOB, CIF and other trade terms, clarify the packaging standards of equipment, and use moisture-proof fumigated wooden boxes for export equipment to prevent corrosion and damage during shipping.The corresponding costs vary greatly from different transportation distances, cargo sizes, and packaging grades. The delivery boundaries are locked at the inquiry stage to avoid transportation-related budget gaps.
Warranty and after-sales support
For warranty and after-sales support, it is necessary to confirm the warranty period of the bridge crane, the warranty scope of wearing parts, whether to provide remote technical support, and the supply cycle of spare parts.Strong manufacturers will provide long-term spare parts supply and remote fault diagnosis services.The warranty policies of different manufacturers are obviously different. The warranty period of some low-cost plans is short, and the price of spare parts for later maintenance is high.When calculating the full-cycle cost of the project, after-sales related costs must be taken into account.When inquiring, write the warranty period, after-sales response timeliness, and spare parts supply terms into the requirements to facilitate horizontal comparison of the comprehensive service value of different suppliers.
What Mistakes Can Lead to an Inaccurate Overhead Crane Quote?
Many procurement inquiries step on the pit. The root cause is not that the manufacturer’s quotation is not accurate, but that there are omissions in the preliminary preparations. The following four types of high-frequency errors are recommended to avoid before the inquiry.
Providing incomplete specifications
The parameters are incomplete, only the tonnage is simply given, and key information such as span, lifting height, and working level is missing.Manufacturers can only estimate according to conventional standard models, and the reference value of the quotation obtained is very low.In the subsequent deepening of the design stage, once the parameters are changed, the price will be significantly increased, delaying the overall procurement cycle.It is recommended to organize a complete list of parameters, and attach factory drawings and on-site photos simultaneously to facilitate engineers to quickly evaluate working conditions and output accurate plans at once.Complete parameter information is the most basic prerequisite for obtaining a reliable quotation.
Overlooking building conditions
Ignore the original conditions of the plant, and only pay attention to the crane equipment itself when inquiring, and do not check the layout of the plant’s legs, column load-bearing, and top pipeline.When the equipment production was completed and the entry was completed, it was discovered that the structure of the plant could not carry the crane load, and it needed to be reinforced and transformed, and the construction period and budget were both out of control.For the renovation project of the old factory building, the inspection of the building support structure must be completed in advance to obtain load-bearing data.Many project delays and budget overruns are due to ignoring the evaluation of the physical conditions of the plant in the early stage, and waiting until the equipment is manufactured to find that the structure does not meet the requirements for use.
Comparing different supply scopes
When comparing quotations from different manufacturers, the boundaries of the scope of supply were not carefully checked.A The manufacturer’s quotation includes host + track + installation.B The manufacturer only reports the crane body, not the track, electronic control accessories and other accessories.If you directly compare the total price, it is easy to make a wrong judgment, choose a low-cost plan by mistake, and continue to add items in the future.The core of the price comparison work is to unify the supply boundaries and check the equipment, auxiliary materials, and service items in the list item by item.Only under the premise that the scope of supply is exactly the same, the price comparison is meaningful, so as to avoid falling into the trap of low-priced quotation.
Ignoring additional costs
Ignore all kinds of additional costs, only calculate the payment for crane equipment, and omit transportation, packaging, installation and commissioning, inspection, steel structure transformation and other costs.There was a budget gap in the mid-term of the project, and the safety configuration was forced to be reduced to reduce costs.After getting the quotation, it is recommended to split the mainframe, auxiliary materials, engineering, and service items one by one to see all hidden costs clearly.Many purchases only look at the unit price of the host, underestimating the expenditure on supporting projects, and only when the project is implemented do they find that the total budget is insufficient, and they are forced to adjust the plan, which affects the progress of project delivery.
Henan Mine Crane Factory Custom
Henan Mine Crane Factory can provide customized bridge crane solutions according to the hoisting needs of different industrial scenarios, covering single-beam, double-beam, European-style and explosion-proof types.Combining the lifting weight, span, lifting height, plant layout and actual operating conditions, the equipment configuration is reasonably determined.From program design, manufacturing to installation guidance, equipment commissioning and after-sales support, we provide customers with lifting equipment that meets the needs of the project.
If you are planning to support the lifting equipment of the new plant, or preparing to replace or upgrade the existing bridge crane, you can provide specific lifting requirements, plant drawings and on-site photos to facilitate the engineering team to evaluate the actual working conditions, formulate a suitable equipment plan and provide a detailed quotation.Complete project information helps to clarify the technical configuration, compare the costs of different solutions, and reduce subsequent adjustments.Contact Henan Mine Crane Factory for customized bridge crane solutions and quotations that suit your project needs.