Heavy Haul Spec

[655321]

Does anyone have suggestions how to write a max wheel load spec for a heavy haul move (contract to move transformers at a power plant)? I'm concerned about damage to pavements and underground pipes/conduit. Tranformers are about 100,000lbs filled with oil, and will be crossing a mish-mash of pavement types and thicknesses. Most pipes are at least 3' deep.

Thanks!

 

[Ron]

Writing a max. wheel load spec for something like this might be a bit difficult. The load is such that it will require special equipment. You need to determine the equipment before you can limit the wheel loads.

Secondly, you might not be able to limit the wheel loads for the equipment. It is what it is...then you have to deal with how to protect the pavement.

Keep in mind that pavement designs are based on repetitive loading. A single pass of a high load, assuming the contact pressures are reasonable and you don't get rutting, will usually be tolerated by most pavements if they were designed for general truck traffic.

I would suggest you determine the capacity of each of the pavement sections and then work backward from there.

You might also specify that falling weight deflectometer testing and visual assessment be done both before and after the move to assess the damage to the pavement.

 

[dicksewerrat]

Then call the DOT that owns those roads. They will tell you what you can do, which roads you will use and when you will do the move.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[bimr]

Most state DOT's have special permits that allow 27,000 lbs per axle.

http://www.transportunlimited.com/sp_patrans1.htm

http://www.rogerstrailers.com/press_releases/?n=6

.06 Special Hauling Permit.
A. Authority to Issue. The Unit may issue a special hauling permit for a single movement of special mobile equipment or a vehicle where the load or vehicle or both are
oversize or overweight.
B. A permit issued under this regulation for a vehicle which exceeds 27,000 pounds per axle but is less than or equal to 30,000 pounds per axle shall comply with COMAR 11.04.02.01-1E.
C. Application.
(1) To obtain a special hauling permit, the applicant shall submit an originally signed written application, facsimile, or electronic copy of the application on a form and in a manner prescribed by the Unit when the:
(a) Gross vehicle weight exceeds 40 tons (80,000 pounds); or 7
(b) Overall dimensions exceed 85 feet in length, 15 feet 6 inches in height, or 13 feet 11 inches in width.
(2) The applicant shall also comply with the specific conditions under COMAR
11.04.03.02 to obtain a special hauling permit for moves which involve excessive weight or excessive size as defined in COMAR 11.04.03.01.

Are you responsible for the local roads?

 

[655321]

No, were not responsible for local roads. The company I work for owns the roads in on-site. These particular pieces of equipment will be shipped up the river to us and delivered to a nearby port. From there it will brought in pieces to the staging area on site, where finally it will be assembled and make the trip to their knew spot - on our roads.

We'd like to add something in the spec for the "heavy hauler" contract that will be moving the assembled device across our plant.