I knew I was over my payload.....

[Brendan]

causes much discussion on local FB page, defended by same few each time who claim that buses have different rules and are weighed differently ?

Do these same few have offspring on the buses David?
Perhaps they just took a while to work out which child they really loved most.

 

[Jev88]

Was once asked an intelligence/leadership question in military situation.

You have four vital supply trucks at 10 tonnes each. You find the last bridge has a limit of 5T. What do you do?

Best answer was accepted as .... drive over the bridge one at a time. Typically weight limits are written as a third of the bridge capacity......

Not sure if this is true?

 

[SpeedyDux]

Was once asked an intelligence/leadership question in military situation.

You have four vital supply trucks at 10 tonnes each. You find the last bridge has a limit of 5T. What do you do?

Best answer was accepted as .... drive over the bridge one at a time. Typically weight limits are written as a third of the bridge capacity......

Not sure if this is true?

Calling bridge designers to this thread!

Google tells that this Beaver suspension bridge was constructed in 1949. It can't have been designed to carry a live load comprising the US articulated truck of that time with 4 axles which was GVW 80,000 lb (or 35 tons). 10 tons would be a small truck in 1949.

The tour coach filmed was about 20 tons, and apparently 2 of them crossed that bridge on that day, although only 1 featured in the video. You would have thought that after seeing the bridge sagging under the overload, the driver of the second coach would have had second thoughts and found a different river crossing.

 

[PeteH]

Can`t speak for Bridge structures. But we used to test Pressure Vessels up to 1.5 times Design Working Pressure. Generally they will operate well above that (if certified) but there is an allowance for corrosion. The older design(s) where generally well over engineered. Modern ones are not so generously designed!. (I check the one in my garage every couple of years! with an endoscope)

 

[jongood]

It always amazes me ( not difficult) when people say that weight limits do not apply to motor homes when weight limit signs are put at entrances to towns, try arguing that with Guardia or Genderarmmes

The French seem to have a different take on weight limits. For example the Aire at Le Crotoy which is heavily used by 500kgs can only be accessed through a 3500kgs weight limit.

^{_{Subscribers  do not see these advertisements}}

 

[busby]

The French seem to have a different take on weight limits. For example the Aire at Le Crotoy which is heavily used by 500kgs can only be accessed through a 3500kgs weight limit.

Would have thought bridge weight limits must be at least a third or more less than the actual capacity to allow for more than one heavy vehicle crossing at a time either in the same direction or opposing directions where when they cross the double weight is applied I one point. Many 7.5 ton limits are just to stop trucks using rat runs through residential areas.BUSBY.

 

[jongood]

Would have thought bridge weight limits must be at least a third or more less than the actual capacity to allow for more than one heavy vehicle crossing at a time either in the same direction or opposing directions where when they cross the double weight is applied I one point. Many 7.5 ton limits are just to stop trucks using rat runs through residential areas.BUSBY.

No Bridge there and not really a cut through, just giving one of many examples of the French authorities different use of weight limits.

I ve no idea where the flashing heart came from

 

[stcyr]

The bridge near Toulouse had a weight limit of 19t. Officially it was capable of withstanding 30t, as a safety margin - the truck in question weighed 44t. (And the truck belonged to a company with premises within sight of the bridge).

 

[jockaneezer]

Just bought some 1000kg slings the other day, the safety factor listed on them is 7:1, I would think a bridge must have a FOS of at least 5 or 6 ?

 

[thebriars]

Just bought some 1000kg slings the other day, the safety factor listed on them is 7:1, I would think a bridge must have a FOS of at least 5 or 6 ?

I think the point is: "Just bought some 1000kg slings the other day, the safety factor listed on them is 7:1" when new. Same with a bridge, keep going above the safe limit and it will be weakened.

^{_{Subscribers  do not see these advertisements}}

 

[Tony50]

Idiot!
There's a weight limit for a reason, not for fun.

Idiot!
There's a weight limit for a reason, not for fun.
[/QUOTE

I Would not use your first word starting with a " I " in fact I would remove the post . Just a friendly gesture.

 

[MyrtleGuru]

I've been over this one on my bike, but would never have chanced it in the motorhome. Then some rogue trucker took his rig over it.

"Marlow bridge has a 3 tonne weight restriction and is used only by foot and local road traffic. Other traffic is carried by the Marlow By-pass Bridge.

On 24 September 2016, a 37-tonne Lithuanian haulage lorry attempted to pass over the bridge, requiring it to be closed for two months to allow Buckinghamshire County Council to undertake a series of stress tests on the suspension bridge hangers and pins, together with ultrasound and magnetic particle tests.

No significant damage to the bridge was found, and it was reopened on Friday 25 November following restoration of sections exposed for weld testing with three coats of paint, removal of scaffolding surrounding the bridge's two towers, and reinstatement of timber work removed for inspection."

 

[busby]

Just bought some 1000kg slings the other day, the safety factor listed on them is 7:1, I would think a bridge must have a FOS of at least 5 or 6 ?

Must be because they don't know how many overweight vehicles could travel over it at the same time,,BUSBY.

 

[rosalan]

If large vehicles cannot be trusted to drive over bridges with a limited weight capacity, local authorities can introduce physical width restrictions. These could have a locking device so they could in an emergency, be opened to full width.