DRAKO Rope Calculator – Disclaimer

The determined data respectively the recommended PFEIFER DRAKO products are based on the data given by the customer.

PFEIFER DRAKO wants to point out that the suitability and usability of the recommended PFEIFER DRAKO products also depend on the suitability of all other components of the elevator for this projected installation and its specifications accordingly. The determined data therefore has to be regarded as a suggestion not as a final elevator design calculation! It is imperatively necessary to do a final calculation regarding all relevant factors of influence. The calculated expected number of trips is the result of the influences of chosen elevator configuration on the chosen rope type. The basis for this calculation is the statistical data and the rope lifetime equations for running steel wire from taken from K. Feyrer, Wire Ropes, Springer Verlag 2018. The selectable rope types have the according PFEIFER DRAKO brand name. The calculation does not include a quality assessment of the products. The interaction of the chosen rope drive and the rope forces, caused by the applied masses but also further factors of the elevator (i.e. acceleration, rope force differences, friction) and the chosen rope construction is evaluated by means of an approved theoretical basis. Exact and smooth rope installation, good rope tensioning and sufficient re-lubrication must be guaranteed. The calculated data is not subject to be claimed as a legally binding statement for the end-user. It is to be seen as an indication based on the above described theoretical basis, which number of trips can theoretically be expected with the given configurations.

The actual bouncing of the car may be influenced by additional components independent of the cable. The absolute elongation calculation is based on DRAKO's internal research. It is calculated with a statistical average of measurements and results in a theoretical value, which can deviate by up to +/-30% from the actual cable elongation.

Careful assembly to protect the cable, cable tension compensation and sufficient re-lubrication are prerequisites.

PFEIFER DRAKO verifies and tests all versions of the application before publication for freedom from errors and viruses according to the current state of the art without being able to assume any liability. No legal claim for the user can be derived from the values determined with the help of the programme.

Ultimate responsibility for the design of the entire system and compliance with the technical regulations lies solely in the hands of the system designer.