The present invention provides an apparatus and method for suspending and positioning structural reinforcement elements such as rebar within a framework for a slab-on-grade foundation or other type of concrete structure. The finite type rolling guide deviation correcting method corrects a relative positional relationship between a finite type rolling guide for guiding a reciprocating motion of a movable body and the movable body. The machine generated service cache might be utilized to process service requests for which it is not essential that the returned service response be identical to a response that would be generated by the human-generated service. The edge strip is moved to direct the first set of bias tows.