You gave an excellent explanation of the length laws for various states which is a facet of the Bridge Law. HOWEVER, The Federal Bridge Law or Federal Bridge Formula(FBF) establishes the maximum weight any set of axles may legally carry on the Interstate. The FBF is a mathematical formula used to determine the appropriate weight of loads based on axle configuration (number of axles, axle spacing, weight distribution) etc. A simple explanation is you cant have 80,000lbs on a truck that is too short to properly dissipate its weight upon the roadway or "bridges". Dump trucks and short end dumps for example are too short to properly disperse 80,000lbs over the Bridge(distance between) of various axles upon the roadway and bridges. Thats why some trucks can only be registered for 68,000, 72,000 or 78,000gvw. With a standard 3axle tractor and a 48 or 53footer it says on the side of the truck....80,000 gvw. Its all about dispersion. Similar to loading a flatbed the weight must be diapersed over diatance. Trailers are rated for max weight per 10 to 14 ft...that is essentially why metal coils are held off the deck by coil racks and 23.5degree hard wood 4x4s. If all the weight of the round coil rested on the deck....the trailer would buckle because all 46,000lbs is resting only on a few inches of the trailer. I am a retired Ca DoT Officer with 25+ years of Commercial driving experience. Its great to have an inquisitive mind. I still learn new things everyday

That's the simplest, easiest to understand explanation I've seen...thank you

thanks man! big help. ben driving 15 years. but the OTR stuff like this . never had to use

I want to thank you for making this video, I've been off the truck for a few years and this completely slipped my mind... Good to keep up with the basics that I didn't even learn in trucking school 10+ years ago. Be safe out there driver

Thanks. Needed a refresher.

Thank you for sharing .Drive safely .

Great explanation thanks and God Bless you.

Great explanation. Thank you so much

I hope the made apps too to help by now to help let the drivers know about all the low clearance bridges that they can't drive under and warns them ahead of time, I know they have them listed in every state in them truck maps books

Thank you very much I did not know about that

great job

great info thanks

Thank you so much very excellent & very good job👍👍👍👍👍 do you have more vedio?

The kingpin is NOT always 36". I have pulled several 53' dry vans with a 42" kingpin. I pulled one that had a 48" kingpin. When the kingpin is further in, it allows the tandems to be closer to the tail and still be legal for the kingpin law.

Thanks

Hi could you do a video for Michigan.

Great video

Clear as mud. I understood the bridge laws until I watched this.

informative for people who don't like reading the book.

Thank you

helpful info. The only dispute would be the definition of bridge law which does have to do with bridges and roads.

One thing I noticed you said it's always 3 feet from the nose to the kingpin point, that's not always the case. I know for fact there's dryvans with it either further back or forward (I don't know the exact measurement off hand) and I know you were using California as an example but I think its important for people to understand that the rear axle/ axle group isn't measured the same in every state. California measures from the center of the rear axle and other states go from the middle point between the axles in the rear axle group. I'm not dogging you or anything just adding my two cents. Great video though, it was helpful to me, I'm getting back on the road after 3 years off and it helped me remember the way bridge law works. Thanks man

Is there anyone out there who understands the inner bridge on a set of rocky mountain doubles?

“Say a command” Him 😱😳

when in doubt scale out

center of the kingpin is 3 foot away from the tip of the trailer or from the begining of the kingpin just need clarification on that

So do you have to stop at the state line to adjust your tandems or king pin if you are just driving through the state?

On his map book really .

He forgot the cb antennas

Is that distance the min. or max. gap you have to run?

Soooo...what if the weight is to heavy on the tandems at 40'? But law prevents you from sliding them more...

So if they dont know if u going to CA then your load was mess up cuase 40ft isnt much to play with the weight right?

Alabama does have a bridge law it’s 41

These shippers that load the trailers need to know how to load, how hard could it be. I hate going back and wasting my time....

He check out google adsense sometimes ..you can monetize your videos and start getting paid

How long have you been driving

Question do you have to do this if you just passing through .... In each state . Don't have a CDL

in the old days we didn't do all that bs we just guess at it and drove u people make it harder than it needs to be

If you never hauled I a48 but 53 that's how you load a 53 on lest you lite you load all way to the back in ca you must have the trailer on 48ft

Hell let's all go to Alabama !!!

I got here from a 11foot8 bridge video.

They keep imagine stupid laws to charge drivers

King Pin to Rear Axle is different than Bridge Law just sayin'

I'm sorry man, but that is not right. You are talking about KPRA and is a completely different law than bridge law.

This video is not bridge law. It’s just axle to king pin

Thank you dragon

Dont know what thr hell all this means I have never driven 53 foot trailers only 45 and below

You load 53 like a 48

If the bridge is rated for 50k and your rig weighs 80k you cannot drive over that bridge! O.K. Kiddos got that?

What you explained has almost nothing to do with bridge laws. You're explaining kingpin to rear axle which some states have a maximum length. Reefer kingpins have a 36" set back. 53' dry vans have a 42" set back. On a flat or step the set back can be as little as 16". But, regardless of where your kingpin is it has nothing to do with the bridge formula. The meaning of bridge in bridge formula or law has everything to do with the roadway bridges, not how far it is from kingpin to rear axle.

But what if bridge law conflicts when you are scaling your truck. Would one law supercede the other?

WRONG!! You are explaining the kingpin law.

So never get a load of 45k you Wil be in violation of the bridge law is crap

The bridge law is crap and a catch 22 be safe 30yr was enough 4 me

Feet! Not foot, Feet! 1 Foot, 2 Feet, 3 Feet, 4 Feet. F E E T.

wrong wrong wrong bridge law is about bridges what you are talking about is Kingpin to axle spacing rules state by state that differ due to road design and intersection design .. the axle spacing rules are put in place to accommodate the design or the curves in the roads and setbacks at intersection that allow for the offtracking of trailers...turn the page and the read the section that says that Standard configured 5 axle combos are exempt from the bridge formula..and goes on about the weight calculations...bridge law is FEDERAL axle spacings are state by state...