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The heavy truck frame design engineer is faced with many factors when selecting a frame siderail. These factors must be weighed if the siderail is for one truck for a special application, or for a family of frames for tens of thousands of trucks involving the entire spectrum of heavy truck usage. In this paper the various parameters of side bar selection are explored, and a lighter, less expensive design presented for higher gvw siderail applications.

This paper discusses equipment installation practice as related to the truck chassis frame. General guidelines for bolting, clamping, and welded attachment are presented. Problems encountered by the installer, due to equipment mounting on standard chassis, are discussed so that the chassis designer may be aware of the situation.