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A FAQ on the subject of quality labelling can be found here.
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Lifting straps are suitable for gentle lifting. Sensitive loads are loaded as little as possible due to the relatively wide contact surface . A lifting sling from Dolezych meets the highest quality and safety standards. We offer the following variants.
Dolezych manufactures lifting slings and round slings made of polyester (PES), polyamide (PA) and polypropylene (PP ) exclusively in accordance with the latest European standards DIN EN 1492-1:2000 + A1:2008 and DIN EN 1492-2:2000 + A1:2008.
As the German delegate, Dolezych has been involved in European standardisation and also maintains close contact with the trade association responsible for lifting slings and round slings in Hanover. This know-how is reflected in the Dolezych products and is a safety plus for all users.
For more information, see Marking of lifting and slinging equipment.
The woven lifting straps should be optimally matched to the practical requirements in terms of width and, depending on whether they are sewn in one, two or four layers, should have the required thickness to prevent wear. For the same load capacity, narrow lifting slings are usually thicker than wider ones. With decreasing belt thickness, edge stability and transverse stiffness naturally also decrease. This effect reverses with increasing thickness. Wider hoisting belts are well suited for use in suspended aisles, with trusses and provide good surface support on the load. Narrower hoisting belts are advantageous for diagonal pull due to their compact design and can therefore also be used well in the lacing aisle.
Dolezych has therefore developed optimum fabric constructions for a sensible and practical range. The fabrics are also characterised by particularly strong edge stability, high surface abrasion resistance and good UV resistance.
DoMark for woven-in lifting straps
In addition to the standard marking, Dolezych can also supply DoMark, the easily recognisable and unambiguous load capacity and material marking for each lifting strap in numbers and letters, e.g. PES 3000 kg for a woven polyester lifting strap with a load capacity of 3,000 kg. This marking is woven and sewn onto large areas in a captive manner. Even in rough or very dirty use, the marking remains visible for a much longer time.
DoDate – the additional data carrier label
When used in higher temperature ranges, Dolezych has taken a big step forward in labelling, because: DoDate permanently holds the product-related data even when exposed to higher heat (up to approx. 90° C) – no melting, no embrittlement, no tearing in or out. This additional label with textile insert serves, for example, as a data carrier for internal documentation if the time of commissioning or the date of the upcoming visual inspection of the product is to be marked.
DoIdent – the additional production coding
For an extra charge, we also supply lifting straps with the additional Doldent labels. Annually changing colours and quarterly stripes indicating the production period of the product (1 stripe for 1st quarter to 4 stripes for 4th quarter) can serve as an additional labelling option in your company. DoIdent labels cannot be torn off, i.e. they are captive, and can be identified at any time.
Dolezych produces lifting straps from the materials polyester (PES), polyamide (PA) and polypropylene (PP ) provided for by the standards DIN EN 1492-1 and 2.
All three materials are heat-set and stretched as standard, i.e. in addition to the simultaneous colouring and smoothing under the effect of heat, the respective material is given its precisely matched elongation value for both the load-bearing capacity range and for fracture. If the elongation is too high, the so-called rubber band effect occurs. If, on the other hand, it is too low, the extremely useful and important damping properties of woven lifting straps are lost. It is therefore important that a certain amount of elongation remains in the lifting strap. In drop tests on this subject, EXAM BBG Bochum has highlighted the high working capacity of lifting slings compared with other slings.
The following applies to the application: Due to the material-related different elongation values, PES lifting straps, for example, should not be mixed with PP or PA lifting straps when used in pairs. In the worst case, the load hangs crooked and slips off. The joint use of different makes of fabric can also lead to slinging problems if non-optimised fabric constructions with higher elongation are used in some cases. Because even in this case, loads can hang crooked.
Lifting strap loops kink easily due to their soft fabric structure. When hooking into the load hook or passing under the load, this feature can interfere. In order that the lifting strap, like a sling, can be pushed through better under loads, Dolezych also manufactures lifting straps with a special, loop-stiffening sewing technique. In the picture below you can see a comparison of the different loop designs. DoFix is only available up to 2 t load capacity, please enquire!