https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

SURVEY OF SUSPENSION SYSTEMS ON PICKUP TRUCKS USED TO CARRY SLIDE-IN CAMPERS. VOLUME 1

Supplemental Notes: Paper copy also available from NTIS $29.50/set of 6 reports as PB-226 650-SET.
Corporate Authors: Pioneer Engineering and Manufacturing Company 2500 East Nine Mile Road Warren, MI United States 48091
Authors: Ludke, N
Publication Date: 1973-4

Loading patterns, load capacities and consumer knowledge in these areas were determined for 8800 vehicles consisting of travel trailers, motor homes, and pickup trucks carrying slide-in campers. Vehicles were weighed as they arrived at National parks in their operating condition. Rating data was obtained from vehicle manufacturers.