<article class="subdiv"> <header id="titre" class="subdiv"> <h1>Lifting devise mechanism classification</h1> </header> <div id="pdfdata" class="subdiv"> <div style="display:inline-block;width:20%;"> <a href="https://it4v7.interactiv-doc.fr/html/huchez_catalogue_en_1069/rna/page/98"><img style="width:100%;" src="./thumbs/98.jpg"></a> </div> </div> <nav id="breadcrumb"> <p>Vous êtes ici : </p> </nav> <main> <p>FEM/ISO CLASSIFICATION x LIFTING DEVISE MECHANISM CLASSIFICATION To determine the group for your lifting device winch or block and tackle three essential parameters are to be taken into account x Maximum load to be lifted Including the weight of the cable and any lifting accessories hook etc except where these are of a total weight of 5% or less of the load to be lifted x Load condition Details in what proportions the lifting device is used at maximum load or reduced load For an exact classification it is preferably to calculate the average cubic value k using the formula below where β = effective or partial load nominal load γ = dead weight maximum load t = operating time with effective or partial load + dead weight total operating time t ∆ = operating time with dead weight only total operating time Thus a distinction is made between four characterised load conditions k ≤ 0.5 </p><p>0.5 </p><p>k ≤ 0.63 </p><p>0.63 </p><p>k ≤ 0.8 </p><p>0.8 </p><p>k ≤ 1 Lifting devices subjected exceptionally to the maximum load and normally to very light loads Light Lifting devices subjected fairly often to the maximum load and normally to light loads Medium Lifting devices subjected frequently to the maximum load and normally to medium loads Heavy Lifting devices subjected regularly to loads close to the maximum load Very heavy x Operating class This is the average operating time per day on the basis of 250 working days a year The lifting device is considered to be in operation when it is moving conversely it is not during stoppage times between raising and lowering for example These three parameters thus provide the means for classifying the devices into groups of mechanisms in accordance with this table you can use to determine the group for the lifting device you need Duty factor Light Medium Heavy Very heavy Solicitation OPERATING CLASS or average daily operating time in hours on the basis of 250 working days a year 30 mn 15 mn 7 mn - 1 h 30 mn 15 mn 7 mn 2 h 1 h 30 mn 15 mn 4 h 2 h 1 h 30 mn 8 h 4 h 2 h 1 h MECHANISM CLASSIFICATION 16 h More than - More than 16 h 8 h 5m M8 16 h 8 h 4 h 4m M7 8 h 4 h 2 h 3m M6 1Bm M3 1Am M4 1Dm M1 1Cm M2 2m M5 According to FEM rules According to ISO standard x Let us take an example of calculation to determine a mechanism group and the choice of the winch which matches Data Maximum load to be lifted 5000 kg Load condition 50% of time at the nominal load for the lifting device 50% of time under no load Operating class 4 hours a day 250 days a year In view of these elements The characterised load condition k is thus k = 0.79 </p><p>= heavy 3m FEM / M6 ISO The mechanism group determined is The choice of winch in the HUCHEZ range will be INDUSTRIA 5 t FEM/ISO 3m/M6 see page 46 7500TE see page 54 Our technical sales staff is at your disposal to help you determine the characterised load condition corresponding to your case GENERAL 98 </p> </main> <aside> <ul> <li><a href='https://www.huchez.com/interactive-catalog/'>Interactive digital catalogue HUCHEZ 2025 - Winches and Lifting for professionals</a></li> </ul> </aside> <footer> <table width="100%"> <tr> <td width="100%"><a href="http://www.interactiv-technologies.com/interactiv-doc">Interactiv' Doc</a></td> </tr> </table> <ul> <li><a href="./sitemap.html">Plan du site</a></li> </ul> </footer> </article>