Full Floater Posted August 17, 2023 Share Posted August 17, 2023 (edited) I have converted a tandem R600 to a s/a The blown 38,000 Mack rears were replaced with a Mack RAD529 24,000lbs rear axle with the Mack 23,000lbs springs that came with it. The truck has an 18,000lbs front axle. 22.5 rubber I need (should) to determine a new lower GVW for the truck. I have not scaled it yet to determine it's new net weight. The door tag is blank and always has been and I see there are a few outfits online that are duplicating door tags on old truck. Not trying to do anything funny here, just would like a legible and accurate door tag with current and relevant weight numbers on it that apply to the truck now that it's a single. Any insight as to how I would best determine a "new" GVW for this unit? The old GVW was 53,xxxlbs. Im thinking the new GVW should be in and around the 36,000lbs range. Edited August 17, 2023 by Full Floater Quote Link to comment Share on other sites More sharing options...
67RModel Posted August 17, 2023 Share Posted August 17, 2023 Well in USA if the axle centers are 8' apart or greater they can be considered separate (for bridge formula). Since this truck was originally 18,000 front and 38,000 rears you should be fine saying its 41,000 gvw (18 + 23). However, in the federal bridge law the most you can have on any single axle is 20,000 so maybe just say the gvw is 38,000 (18+20). If the truck is a tractor its difficult to get 18,000 pounds on the steer axle since its set forward. If its a dump truck or something else you may be able to max out the steer depending on where the body is located in relation the rear axle center and how its loaded. 2 Quote Link to comment Share on other sites More sharing options...
Full Floater Posted August 17, 2023 Author Share Posted August 17, 2023 (edited) Great insight, thank you. And it's a rollback tow truck just fyi. Should be well spec'd for it's application. Edited August 17, 2023 by Full Floater Quote Link to comment Share on other sites More sharing options...
tjc transport Posted August 17, 2023 Share Posted August 17, 2023 either 36 or 38 as registered weight will be fine. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment Share on other sites More sharing options...
Full Floater Posted August 17, 2023 Author Share Posted August 17, 2023 (edited) Here in BC canada, 36 keeps at an annual inspection level instead of semi annually, which would be great of course. So that's what it will be then. Thank you Edited August 17, 2023 by Full Floater 2 Quote Link to comment Share on other sites More sharing options...
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