The construction hoist is tansmittetd by rack and gear.it is electrics components adopt SIEMENS by self developing based on digesting and absorbing ALIMAK technology,we have become a main manufacturer for this equipment with its varieties and high quality.there are 2 models avialble with single cage and double cages,its max load is from 1T to 2T.and its transmission device can be inner fixed or upper fixed as per customer's request.