Home - Trailers - TrombonesTrombonesConstruction industry workhorseDennison extendable trailers, or trombones, are a vital piece of equipment in the construction industry. The ability to accept long loads that would not fit on to a standard platform trailer make this trailer design a true workhorse that needs to be as rugged as any other piece of construction machinery.Our extendable trailers are capable of lengthening up to 21.25 metres and are available with a number of options including straight frame or drop frame versions.Call our knowledgeable teams on 01524 381808 for UK and +353 (0)45 866468 for Ireland, and let’s get you on the road!