-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU]On Behalf Of Stanley K Lengerich
Sent: Wednesday, November 11, 2009 2:56 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Hood Sash Cables

It would be a good idea to check with your hood manufacturer. Depending on the age, most hoods made in the last 10-15 years (sometimes older) were designed with braking or fail-safe mechanisms that will prevent the "guillotine-effect" in the event of a cable break. The manufacturer should be able to tell you if your hoods have this safety feature.

Also, I have seen that when the pulleys are made of plastic (e.g. nylon, etc.) they can grip the cable and cause it to unwind and rewind as it passes over the pulley, which speeds up wear. It may be a good idea to consider replacing plastic pulleys with steel pulleys.

Stan Lengerich
Eli Lilly and Company

RJ Wolcik <rj**At_Symbol_Here**STREM.COM> Sent by: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**list.uvm.edu> 11/11/2009 01:25 PM Please respond to DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**list.uvm.edu>

To DCHAS-L**At_Symbol_Here**LIST.UVM.EDU cc Subject [DCHAS-L] Hood Sash Cables

We are looking for some ideas on hood sash cables:
 
We inspect all our hood sash cables quarterly by a visually inspecting the cable and running a finger along the cable to feel for any bumps or frayed wire.  We use 3/32” stainless steel “aircraft grade” cables with a rating of 900 pounds.  We have found wire that has frayed in the middle of the twist and it is not visible without a magnifying glass, and if it were to give away while someone was in the hood, we would have a serious injury.  We are thinking about instituting a change schedule for all the cables. Does anyone have any ideas or comments?    
 
Does anyone have any information on cable breakage, or has anyone heard of an incident of both sash cables breaking at the same time causing the sash to completely fall?
 
Does anyone have a policy they would be willing to share?
 
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R.J. Wolcik
Environmental Health and Safety
Strem Chemicals, Inc.
7 Mulliken Way, Dexter Industrial Park
Newburyport, MA 01950-4098, U.S.A.
Telephone: 978.499.1660
Fax: 978.499.1661
Email: rj**At_Symbol_Here**strem.com
www.strem.com
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