G'day All, Currently investigating an existing sytem with constant support hangers. we want to see if the current hangers are adequate. All the hangers are of the same type and we have the catalogue from the supplier for their load range. How do I investigate this on caesar? (do I just input the actual values for each support or do I leave the property blank, allow Caesar to show me the deflections/load then compare this with the range value of the existing hanger?) Thanking you all in advance.

If you know what the setting on each of the "constant effort hangers" is, then I would specify that in your CAESAR II input.

If you don't now this, then leave things blank, and let CAESAR II design the hanger. Then verify that the result is within the catalog range.

Hi Pickles,

Look at each and every hanger and get the hot load data off the manufacturer's name plate. Use that in your CAESAR II model. Now, if these things have many years of "experience" there will be an internal (to the hanger) friction that will have to be evaluated. While you are walking down the system and the hangers, examine each hanger and note its condition (corrosion, loose parts, missing hardware, evidence of someone "mucking about" with the elevations or the settings. AND DO NOT overlook the fact that "constant force" hangers can be "adjusted" in the field to change their reactive (supporting) force - look for evidence of this too. Have a look at ASME B31.1, Appendix "V" (roman numeral) for a list of what to look for and for a check list to use "whilst" you are out there looking.

At least 50 percent of the work in evaluating existing support systems is done
on-site.

Regards, and good luck.

Thanks Richard... Thanks John, I most certainly will instruct our on-site Engineer to check the status of each hanger and to email me photos.