Tie testing “NASC TG4:11”

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finnbarr

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Good morning Guys

Just after a bit of clarifacation into the testing of anchors according to TG4:11

It lists on the guidance note the following

Proof tests.
These are needed to check that anchors to be used in the job have been installed correctly.
They should be carried out on all projects.
This guidance applies to all new jobs and to structures with previously installed anchors.
A sample of anchors .....ect

which i fully understand,then it lists
6.4 Test Procedures
Site tests should be carried out by suitably competent personnel (other than the actual installer of the fixings tested) using a test meter with a gauge calibrated within the last twelve months to an accuracy of < 5%. Test equipment should apply the load to the anchor and not through the tie through suitable couplers and be arranged such that the reaction loads are taken sufficiently far from the anchor so as not to influence the result, typically this means ensuring the feet of the bridge do not rest on the masonry unit being tested.

does this mean a second suitably qualified operative (not involved in the erection of the scaffold )has to do the required pull test and sign off the test,i know this stops conflict of interest of the pull test but also adds extra cost to each project(surely that would mean a operative going around all day doing pull tests),and more interesting does anybody out there actually proceed in this way.
I know these are guidance notes,but in relation to a independent operative doing the pull test do we need to comply with them legally,

your comments are most welcome.
 
Yes m8 we do...you only need to test 5% of the total or 3No whicj ever is less so you ate not gonna spend days testing 1 job.ring andrew @ hydrajaws competency certificate takes 2hrs & costs £50 they'll even site visit & do all ur staff in 1 go
 
Hi mate thanks for that,so if i am understanding you correctly,each job you erect and have a requirement for a pull test a another qualified tester that hasnt been involved in the erection of the job pull tests your anchors??....to comply with guidance?That is the part i am not to sure on.....cheers in advance.



just realised i have posted this in the wrong section too.............idiot !
 
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Don't worry too much about sections Finnbarr.

The way I read and understand the wording on that document is that a supervisor can check the pull test on a job rather than there being any special requirement to use a 3rd party tester.
 
thanks for your input,i guess what i am trying to get at is not the need for a 3rd party to check them,as you say a supervisor would be able to,having projects erected at the same time,over a large radius,everyday logistically for a supervisor to get around them,do his work and pull tests at the same time creates a bit of a challenge.Also lots of jobs may have only the top lift boarded,which creates another issue with safe access to the ties which could be on un boarded lifts
I am just throwing it out there to see if you guys have any welcome suggestions.
would it be possible to have 2 qualified testers on each job,one to install the tie and one to test??,it does say in the guidelines that the tester should be someone other than the anchor installer.I know there is no such thing as a compromise when it comes to HSE and codes of good practise but that seams to be the only cost and time efficient way to deal with the issue.(unless you have others)

Again many thanks your imput is welcome.
 
You dont have to be a. tester to install them anyone that is trainned to do so can...but technically you are correct - under tg guidlines the the installer should not be the tester.- what we normally state on the paperwork & test report is the installers name & the testers name just to comply but tbh in reality maybe the same person on the ground. As long as you show ur proof test loadings &,main test loads theres never normally a probl em....that only occurs if one of the 5% that you test fails.which means you have to technically declare the failure & tst more....
 
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Thanks SP,
funny that the steel balcony we had bolted on our house which will be up for 50/100 years required zero pull tests to comply........but a scaffold 3 lift 13 foot tower,up for the Local authority,up for 2 days a pull test to comply.
anyway thanks again.
 
Lol most external fixings actually do but rams can get forgotten about to save cash....but if it ever did fall off i bet you the installers would suddenly have the test report to give to the hse lol
 
yes we have,although we will be looking into getting all the erectors signed off,mainly i was asking the question as i am updating written procedures,MS and Fixed costs on the jobs,thanks again
 
I would suggest you are more than covered doing that Finnbarr.
 
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