Equipment Calibration. When?!?!. Before and After transportation.

[Yavoran]

Dear all,

What is your oppinin.

My Contractor is to apply post tensioning in a couple of days.

So when requested he provided a calibration certificates for the posts tensioning equipment. The problem is that the calibration has been done 4 weekes ago before the Equipment being shipped half way around the world. My common sense says that the moment the equipment was shipped the calibration certificates were invalidated.

What is your opinion? And experience.

Thanks in advance


(to get it right assume you are wrong)

 

[Ingenuity]

All is probably okay...unless the equipment was damaged during transportation, which is unlikely as hydraulic equipment is very durable and robust.

We usually calibrate our equipment with a load cell every 6 months and we air and sea freight it regularly.

If you have a calibration problem it is usually evident durign first stressing. Have the PT contractor keep a MASTER gauge for cross-calibration.

Is the PT work slabs/beams for buildings or girders for bridges? Or other special PT works like cable stays? Single or multi strand stressing?

 

[Yavoran]

Thanks!

My concern is exactly the transportation. I am not realy worried for the Jack itself, the problem is with the pumps and the gauges, They are the ones that are not realy robust. At least the ones that they intend to use are not.

The project involves a multistrand PT works on a Brige Girders.

Thanks

(to get it right assume you are wrong)

 

[Ingenuity]

Hydraulic pumps are robust - a construction site is usually more severe than transportation.

We usually ship our pumps in steel job boxes with 2"x4" timber blocking to make sure they do not shift during transport.

We usually use 6" dia face gauges (sometime 8" diameter MASTER gauges) that we encase in 1" thick foam sleeve padding and place them in the steel job box and secure.

Multistrand rams are usually pretty large and they are usually packaged seperate from the pump, hoses and gauges. 12 strand rams can fit in a moderate size steel box, and larger rams are usually steel strapped to timber pallets/skids to avoid them rolling and breaking a hyd fitting.

HTH

 

[Yavoran]

Thanks,

It would have been OK if everything was done properly, But when unfortunately the packaging was also not what you or I would expected.

Y

(to get it right assume you are wrong)