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Quick Enquiry:

Site Survey


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If a site survey is needed we always recommend one before placing an order. There are typically two ways a crane build progresses. The first is that we manufacture a crane/and/or gantry for a pre-existing facility, or an overhead crane for pre-existing gantry steelwork that needs to be measured and sized by our engineers. The other way we manufacture a crane is to a dimensional drawing given to us by the customer, therefore in some instances a site survey may not be required in these circumstances.

 

1 off site survey may be included in your order depending upon distance. If you are buying a crane/and/or gantry system the site survey is intended for our engineers to measure and survey your facility to determine the design and installation method. If there is pre-existing gantry steelwork we measure all obstructions inc. the rail centres along the gantry runway (horizontal beam sections) approximately every 5 metres, which would determine any ‘snaking’ in the crane rail or out of line crane rail due to misalignment, and take an average measurement to determine the crane rail centre measurement. Any problematic rail will be addressed and the customer notified. We also check and detail any pre-existing busbar conductor system to verify pickups and bracket compatibility and if new busbar is required.

 

If there is snaking in the crane rail our engineer would determine if the crane rail was snaking all in the same direction (ie. 10mm outwards direction on one side and 10mm inwards direction on the other, as seen here: (( ) ,which means the crane will follow the snaking (( in the rail, and that the span difference of 20mm along the crane rail isn’t a concern as the crane rail may not be bellying outwards (10mm outwards each side), (). If it was bellying outwards this would make the wheel grooves tight and rub on the crane rail and potentially cause crabbing/jamming/de-rail. Other issues are if the crane rail joints are out of line with a steel diagonal ‘edge’ exposed which the double flanged crane wheels can run into and cause the crane to crab and re-rail. The site survey is to try and reveal any potential problems such as this.

 

MEWP access equipment (cherry picker or scissor lift) has not been priced into the site survey. We expect the customer to provide MEWP access equipment unless otherwise stated. When we organise with you to attend your facility to carry out the site survey please let us know if you do or do not have access equipment available for our engineers to use. Should you not have MEWP access equipment on site to be made available to our engineers for reaching the gantry crane rail (as part of taking rail centre laser measurements) then we can hire in a scissor or cherry picker. If you do require us to bring dedicated access equipment and we haven’t attended site previously, or have seen pictures or been provided facility drawings, then please state how high up the crane rail is and floor manoeuvrability. An articulating boom cherry picker basket can reach over machinery and floor obstacles in order to get close up to the gantry crane rail / wall from further away. If there is ample room to get up close to the gantry / wall please let us and a scissor lift would be sufficient. Typically a Genie Z45 16 metre diesel articulating boom (or equivalent cherry picker) hired in for the 1 day is usually the machine of choice.

 

The site survey would be carried out by our engineers who would take all the relevant laser measurements within your facility in order to calculate your precise rail centres. The site survey results will also determine how the crane can be installed and what provisions we would need to put in place in order to get your crane to fit, such as the roller shutter door. The site survey is essential in order for us to manufacture a crane (or modify and re-span a used crane) that will maximise your long, cross and hoist travel motions. If you need as much achievable height of lift as possible out of the design then please let us know before an order is placed. The site survey will determine what is achievable.

 

If you have a pre-existing gantry steelwork system in place then our engineers will measure up all the steel sizes. Based on the steel size and construction of the pre-existing gantry we will then you know if your gantry system is sufficient to safely cope with the crane’s weight + MAX SWL + 25% safety factor. We will then advise accordingly, for example if additional intermediate support columns are required.

 

It is the customer’s responsibility to let us know how thick the concrete pad is, what it is made of, and what is underneath the concrete floor. A civils contractor is always required to evaluate whether your floor is suitable for the proposed gantry steelwork. Once an order is underway we can provide the civils contractor with all the crane and gantry steelwork sizes and weights (if required) for them to determine the suitability of your flooring.

 

If the customer requests a second site survey (for install purposes closer to crane build) there will be an additional non-refundable charge. A site survey can also be carried out before an order is placed Proforma invoice. Hired in MEWP access equipment is non-deductible.

 

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