[Dsg-rich] Fwd: Re: Fwd: winch rating for RICH assembly

[Tyler Lemon]

Hello, 

Bob Miller (emails below in blue) has stated in Email #2 below that the winch to be used for RICH rotation during assembly " is not an under hook lifting device, so it does not require a JLab load test." The winch has been used to assemble the structure in Italy (Email #3 from Sandro). 

We would like this matter (load testing) to be resolved between Rusty Sprouse and Bob Miller as soon as possible. We would like to have the TOSP as soon as possible so that we have no delay in proceeding with RICH construction when INFN collaborators arrive at JLab on March 6, 2017 . 

Best regards, 
Tyler 


EMAIL #1 
From: "Mirazita Marco" <Marco.Mirazita at lnf.infn.it> 
To: "dsg-rich" <dsg-rich at jlab.org> 
Sent: Friday, February 24, 2017 7:45:31 AM 
Subject: [Dsg-rich] Fwd: Re: Fwd: winch rating for RICH assembly 

Hi all, 
as you can see we don't need a new winch and we don't need to do any 
load test. 
Best regards, 
Marco 

EMAIL #2 
-------- Messaggio originale -------- 
Oggetto: Re: Fwd: winch rating for RICH assembly 
Data: 2017-02-24 13:10 
Mittente: Bob Miller <rmiller at jlab.org> 
Destinatario: Tomassini Sandro <sandro.tomassini at lnf.infn.it> 
Cc: Dario Orecchini <dario.orecchini at googlemail.com>, Marco Mirazita 
<Marco.Mirazita at lnf.infn.it> 

Hi Sandro, 

This is not an under hook lifting device, so it does not require a JLab 
load test. If you are comfortable using it, then we do not need to do a 
load test. 

Regards, 

Bob 

EMAIL #3 
On 2/23/2017 3:32 PM, Tomassini Sandro wrote: 

Hi Bob, 
yes, the structure was assembled and used to assemble the RICH at the 
Company that built everything. 
Sandro 


EMAIL #4 
Il 23/02/2017 21:27, Bob Miller ha scritto: 

Hi Sandro, 

Yes, I think we will need a fixture to load test the structure. 

Has this structure been assembled and used already? 

Thanks, 

Bob 


EMAIL #5 
On 2/23/2017 3:22 PM, Tomassini Sandro wrote: 

Hi Bob, 
unfortunately I do not have any plan and any tool ready. 
I envisage that we/you have to build a beam (steel extrusion) to 
connect to the pivoting part and with an eye bolt on the other side 
and in the middle a hole to attach 1250 kg at about the RICH 
barycenter. See Sketch below. 
I think this is the more realistic way to load correctly the 
structure. 
I do not have any drawing of the tool I mentioned but we can try to 
make a fast sketch and you should produce at Jlab. 
I do not know if you have a better solution. 
If you agree Dario or me can design it and you build it in US. 
Let me know 
Sandro 

EMAIL #6 
Il 23/02/2017 18:51, Bob Miller ha scritto: 

Hi Sandro, 

I am being asked to load test the RICH assembly structure. Do you 
have a plan or any tooling for how to load test this structure? It 
looks like we would need some kind of tool to take the place of the 
RICH box to apply the load to the structure. 

Regards, 

Bob 


EMAIL #7 
FROM: 
Tyler Lemon <tlemon at jlab.org> 

TO: 
Bob Miller <rmiller at jlab.org>, Mirazita Marco 
<marco.mirazita at lnf.infn.it>, dsg-rich <dsg-rich at jlab.org> 

CC: 
Patrizia Rossi <rossi at jlab.org> 

Hello Bob, 

Please find attached slides from Marco Mirazita showing calculations 
for the planned rotation of RICH after the assembly of the detector 
shell. 

The GR1000 winch (image of load specifications also attached), is 
rated for 1000 kg. Rusty Sprouse has not approved the load test at 
1,250 kg due to the 1000 kg rating of the GR1000 winch. 

However, it has been calculated that the maximum load exerted on the 
winch will be ~775 kg. Please let us know whether the rating of the 
GR1000 winch is adequate for the rotation of RICH using the lift 
procedure as shown in the slides. If it is not, we will find another 
solution. 

Best regards, 

Tyler 

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