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Crane Site Survey

Crane Site Survey.

What happens when we order an overhead crane, and will we receive a crane site survey? Yes, when you place an official order an overhead crane one of our fully trained site engineers will carry out a a full crane site survey. While on site we will try to establish a number of things and answer any questions you may have about the installation process. We will also take all the required measurements for your overhead crane. We can then show the hook to floor measurement as well as the cranes travel distances.

Our engineer will take all the usual factory dimensions and the area the crane needs to cover. This includes the building span, the eave height at its lowest and highest point, as well as the roof height in the centre. This gives us the degree angle of the roof. We also record the workshop down-shop length, and the distance between the building upright supports.

Hazards.

During the crane site survey we will conduct a walk through with you to identify any potential hazards. For example office doors, fire doors, heaters and floor joints etc, hence reducing issues after installation. It is bad practice to put bolts through floor joints. While on site we will try to establish where each free standing crane supporting column will be sited, often with a hand sketch. Aesthetically we often get asked to line crane columns up with the existing building uprights.

It is not good practice to put a crane column over a floor joint or expansion joint in the concrete, or within 200mm of it. Drilling near a joint could cause a crack in the concrete’s join, thus undermining the stability of the crane’s supporting column. Even, potentially weakening the cranes structure, and almost certainly damaging the integrity of the floor. We over come the problem by suggesting moving the crane support columns. This identifies potential problems before manufacturing begins, saving everyone money.

crane site survey

crane site survey

Our site engineer will also go through the power feed requirements you will need to have in place before we arrive to install.

Free Issue Crane Rails

If you are providing and erecting free issue crane rails, we require the following on our site survey.

1. That the gantry rail has actually been erected before we attend site.

2. End stops have been fitted to the gantry tracks, high enough for the crane end carriages. We cannot issue a test certificate without these.

3. Square bar or gantry running rails, has been fitted on top of the main universal beams, for the crane to run on. Our measurements will be taken from here. The crane we supply has H shape wheels on it and they run electrically down the length of your workshop on the rails (square bar).

4. The square bar must be in line across its span; all the way down the length factory, to British Standard tolerances. This must be welded on top of the universal beams to within + or – 3 mm to BS tolerance. When this is fitted prior to our arrival on site we can measure the steelwork span (or rail centres) to make your crane fit to. Failure to do so will result in a second extra chargeable site visit.

Square Bar Fitted Correctly

 

We are happy to quote to provide new or used crane rails and tracks, please ask for a quotation. It almost always saves money in the long run; as incorrectly fitted rails will result in; worn crane wheels, void warranty and extra costs.

The Factory Floor Depth.

Most factory floors will take a free standing crane on for capacities of 1t, 2t, 3.2t and often even 5 tonnes. However, we will always ask about your floor depth and quality of concrete, beware of companies who don’t. No one can guarantee someone else’s floor or factory structure. For piece of mind however, we can provide you with a set of column loadings; giving height, span, end carriage length, maximum vertical load, maximum horizontal load and most importantly the over turning moment imposed by the crane you require.

It is advisable to give these column loadings and overturning moments to your landlord or structural engineer. If the landlord cannot or will not approve the loads imposed by the crane and its load, or if you own the building, you may still need to consult a local civil and structural engineering company. For absolute piece of mind a full floor survey will take core samples during test bores and take 150mm to 200mm deep sections out in 3 or 4 places. More importantly they will examine what is below the concrete.

Following a crane the survey we will issue a drawing to you to approve before manufacturing of the crane and steelwork can begin. Our quoted lead time will be from payment of the deposit and signed drawings. This is when the clock starts ticking!

A crane site survey may incur a charge, depending on the distance, especially if an order has not been placed.

Fear not; when installing an overhead crane we DO NOT do this.

Suicidal Crane Engineers.

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