GENERIC NAME FOR UNISTRUT OR POWER-STRUT

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Author Message Wayne Yancey Senior Member Username: wayne_yancey Post Number: 260 Registered: 01-2008 Posted on Wednesday, September 23, 2009 - 06:53 pm:    I would appreciate a generic drawing name for cold-formed metal channels with flange edges returned toward web and with 9/16 inch wide slotted holes in webs at 2 inch centers, with rust inhibiting acrylic enamel paint electro-deposited and baked; single channel and double, back-to-back channel. Same as manufactured by Unistrut Corporation or Power-Strut. Thanks Steven Bruneel, AIA, CSI-CDT, LEED-AP Senior Member Username: redseca2 Post Number: 196 Registered: 12-2006 Posted on Wednesday, September 23, 2009 - 07:58 pm:    Adjustable Framing System: Channel members and bolted connections fabricated to support loads without welded connections. We have used that since before I came on board. Phil Kabza Senior Member Username: phil_kabza Post Number: 404 Registered: 12-2002 Posted on Wednesday, September 23, 2009 - 09:44 pm:    MasterSpec 055000 has them as "Slotted Channel Framing" complying with MFMA-4 (downloadable here: www.metalframingmfg.org/04_Standards.doc Wayne Yancey Senior Member Username: wayne_yancey Post Number: 261 Registered: 01-2008 Posted on Thursday, September 24, 2009 - 10:20 am:    Thanks Steve and Phil. Steven Bruneel, AIA, CSI-CDT, LEED-AP Senior Member Username: redseca2 Post Number: 197 Registered: 12-2006 Posted on Thursday, September 24, 2009 - 12:29 pm:    Thanks Phil for the new standard that I admit I did not know existed. Ronald L. Geren, AIA, CSI, CCS, CCCA, SCIP Senior Member Username: specman Post Number: 800 Registered: 03-2003 Posted on Thursday, September 24, 2009 - 12:34 pm:    Subscribe to MasterSpec and you would have known. ;-) Ron Geren, AIA, CSI, CCS, CCCA, SCIP www.specsandcodes.com Wayne Yancey Senior Member Username: wayne_yancey Post Number: 262 Registered: 01-2008 Posted on Thursday, September 24, 2009 - 12:36 pm:    Ron, I will forward your recommendation to the leadership for approval, but don't hold your breath. Steven Bruneel, AIA, CSI-CDT, LEED-AP Senior Member Username: redseca2 Post Number: 198 Registered: 12-2006 Posted on Thursday, September 24, 2009 - 01:03 pm:    We do subscribe, but that doesn't equal knowing. Phil Kabza Senior Member Username: phil_kabza Post Number: 405 Registered: 12-2002 Posted on Friday, September 25, 2009 - 08:32 am:    Get fast enough with a mouse and you too can appear knowledgeable. ken hercenberg Senior Member Username: khercenberg Post Number: 37 Registered: 12-2006 Posted on Friday, September 25, 2009 - 01:52 pm:    Phil, that's a very zen thing to say to someone who has a photo of his cat for his postings. Mark Gilligan SE, CSI Senior Member Username: mark_gilligan Post Number: 215 Registered: 10-2007 Posted on Saturday, September 26, 2009 - 07:51 pm:    While this standard, which I had not seen before, helps bring uniformity to these systems it may be that Wayne's concerns are not fully answered. If you simply want to specify that a Metal Framing System is to be used that will be designed and detailed by the Contractor it is probably adequate. There does not appear to be a generic notation for calling out specific strut channels. There are variations of geometry and the layout of the holes punched in the channels that are sometimes critical. I have handled this by using the Unistrut notation. There exist cross references that claim to give you the notation that is used by the other manufacturers. Many of the fittings are specific to a particular manufacture and thus if you or your consultants are designing the system, you will have to call them out using the manufacturers designation. I am not sure that the "standaed" is fully maturee thus the designer could have to reference other sandards to. This may not be a problem in many instances because the channels themselves, ut not the fasteners, are covered by the AISI standard. (Unregistered Guest) Unregistered guest Posted on Monday, September 28, 2009 - 07:51 pm:    These miscellaneous channels seem to end up being treated in the same way that many fasteners are: "use fasteners." In both cases, we assume that the appropriate items are selected by the contractor. If the above-ceiling mounted transformer doesn't come crashing down, then it was a good assumption. It would be good to consider requiring calculations with shop drawing submittals, or even a delegated design submittal, if you are supporting big stuff. (Unregistered Guest) Unregistered guest Posted on Monday, September 28, 2009 - 07:48 pm:    Notwithstanding everyone's postings, what I have thought is important, from spec standpoint, is metal (or material) and finish be appropriate for specific application environment...whether it be aluminum, fiberglass, carbon or stainless steels, painted, zinc-plated, pre-galv, or HDG (which might be limited to thicker gages?) Mark Gilligan SE, CSI Senior Member Username: mark_gilligan Post Number: 216 Registered: 10-2007 Posted on Monday, September 28, 2009 - 11:11 pm:    Statements such as "use fasteners" are troublesome because they may give others the impression that you have evaluated the loads when you have not. These statements are often an indication that somebody has gotten lazy and dropped the ball. In these situations you should either formally assign design responsibility to the Contractor or accept responsibility for the design or lack of design. This does not mean that all situations must be formally engineered but it means that you have considered the issue and have decided that if you were to do the formal calculations that it would be safe. What qualifies as "big stuff" can vary depending on the configuration of the framing system. Patrick Boone (Unregistered Guest) Unregistered guest Posted on Wednesday, October 07, 2009 - 12:54 pm:    One more consideration would be to include a statement such as: "Once contractor has selected the metal framing manufacturer, all components of the system shall be from a the same manufacturer"