Doug, Ingemar (and all) - I would add, that from functional, practical and customer relations perspectives, I claim that dissipative tile is the way to go. Ever watch a prospective client inspection team, or periodic audit team, as they first set foot inside your shop (a rhetorical 'yes' I'm guessing)? When you can show them your clean, shiny floor with no debris, no cardboard or conductive junk laying around, Humidity and temperature controls, ionizers, ESD symbols posted everywhere, EVERYONE wearing conductive footwear and simply make the statement - "we're doing everything we can to help eliminate ELF" - generally, they've seen enough of your ESD control plan and commitment to just move on to other subjects in their audit. This saves time in itself, truly is the best system to combat ESD and really is a bona-fide commitment to do your best to protect your clients from ESD headaches. At controls', we've eliminated 'worry' and instilled confidence in ourselves and to our customers. With bare concrete, wax, paint or whatever - we used to get that 'dog-eyed, cocked head look' when we showed our nice, waxed cement floor - regardless if the ESD conditions were acceptable, or not. That was generally followed by 'prove it'. We have even gone to the extend of removing all mats and went wall-to-wall with tile. We also require conductive shoes that stay in the employees lockers (and stay dirt free). That safeguards against the grounded heel strap foot being lifted for comfort and not in contact with the floor. As Ingemar said, meters that are go / nogo assure continued compliance even in an ESD secure environment, like ours. Tiling before moving in can save alot on asprin, too. Trust me, we've been there after the fact - and moving 70k sq ft of equipment so you can tile doesen't come with a lot of pleasantries, until you're all done. Regards, Russ Steiner controls/inc. ----- Original Message ----- From: Ingemar Hernefjord (EMW) <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, October 08, 1999 4:13 AM Subject: Re: [TN] Conductive Floors ... > Doug, > one way to assure yourself and the customer is to buy a number of ESD indicators. Put them on the wall, one wire to the floor, let people walk some steps, go to the indicator, one foot on the metal plate one hand on the upper plate and you get a GO or NOGO. The indicators cost little and are extremly easy to handle. That's one way to look upon your question. And and accepted way! > Ingemar Hernefjord > Ericsson Microwave Systems > > What's the actual resistance of a floor that's > considered acceptably "conductive" for an area > that will be handling telecommunication boards? > I mean, if a customer came into your facility > and wanted to measure your floor to have it pass > or fail being a suitably "conductive", what > resistance would they use for that criteria? > > A former coworker informed me that my old company > is moving to their new building. With the move > is the discussion about whether to leave the new > area as bare concrete, tile it, or paint it. > I'm of the opinion that they can leave it as bare > concrete, but that's only my opinion. > > The old building had conductive tile with copper > strips and was extremely expensive but reliable. > It also seemed to make the customers feel at ease > with something they could see as opposed to bare > concrete. I can remember making periodic checks > with a surface resistance tester, but for the life > of me, I can't remember the limits. > > Any additional comments or opinions appreciated, > since this topic seems to come up here every now > and then. > > Regards, Doug > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################