Found A Cool ARI Legacy...
Topic 16630 | Page 2
Old School's Comment
8 years, 6 months ago
A lot of the "stretches" are actually extension rails, bolted into existing holes.
This is exactly how mine was done, but they did cut the rails, then bolted the extensions in place.
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49 CFR ยง 393.201 Frames.
(a) The frame or chassis of each commercial motor vehicle shall not be cracked, loose, sagging or broken.
(b) Bolts or brackets securing the cab or the body of the vehicle to the frame must not be loose, broken, or missing.
(c) The frame rail flanges between the axles shall not be bent, cut or notched, except as specified by the manufacturer.
(d) Parts and accessories shall not be welded to the frame or chassis of a commercial motor vehicle except in accordance with the vehicle manufacturer's recommendations. Any welded repair of the frame must also be in accordance with the vehicle manufacturer's recommendations.
(e) No holes shall be drilled in the top or bottom rail flanges, except as specified by the manufacturer.
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The "in accordance with vehicle manufacturers recommendations" and "except as specified by manufacturer" - is the key wording here. Most manufacturers will specify/recommend that you DO NOT weld or drill frames. This keeps THEM out of the "legal liability loop". So if a manufacturer says NO, not under any circumstances (to keep their butts out of trouble) and you do it anyway - you're in violation of 393.201 - ie: ILLEGAL.
But that's a technicality - and I don't see anything worse than getting put OOS for a really egregiously horrible welding job.
The real problem is that these rails are HEAT TREATED - and when you weld or drill (and create too much heat with the drilling) you alter the structural soundness of the rail.
A lot of the "stretches" are actually extension rails, bolted into existing holes.
You can be sure that ARI has done enough of these - that they know how to either re-heat-treat the item in question, or avoid altering its metallurgical properties.
Joo Blow welding a toolbox onto a frame rail - probably doesn't. Once a crack develops - it only gets WORSE.
Rick
Commercial Motor Vehicle:
A commercial motor vehicle is any vehicle used in commerce to transport passengers or property with either:
OOS:
When a violation by either a driver or company is confirmed, an out-of-service order removes either the driver or the vehicle from the roadway until the violation is corrected.