For decades, Columbia Industries has been designing and manufacturing custom equipment for the solid waste and bulk materials industries. Over 40 years ago, Columbia pioneered trailer unloading technology by producing the first Columbia Tipper. Using tippers to dump the load means you no longer need to operate and maintain heavy, expensive, self-unloading trailers. Three minute cycle times allow you to unload up to fifteen trailers per hour. Columbia offers the shortest lead time for new unit delivery in the industry.