But Chuck is looking for an advantage, not just to sell a clone. Lots of clever ways to avoid bumps on the bottom. Welded trays. Stamp a recess for the carriage bolt head to sit in. Put all the bolt holes on the sides of the rails. PEM studs.
Oh, and keep UPS Ground shipping dimensions in mind. From: Adam Moffett Sent: Tuesday, January 12, 2016 4:16 PM To: [email protected] Subject: Re: [AFMUG] Non Pen Mount Question Right, but the Rohn FRM has the heads of carriage bolts on the bottom. On 1/12/2016 10:19 AM, Eric Kuhnke wrote: Yes... If it is truly flat it has better adhesion/friction in high winds. Plus imagine ice freeze/thaw cycles under a 5mm protrusion multiplied by 15 years. Not good for the roof. Losing an access agreement to a key roof would really suck. On Jan 12, 2016 7:13 AM, "Chuck McCown" <[email protected]> wrote: Do you think the head of a carriage bolt would be a problem? From: Eric Kuhnke Sent: Tuesday, January 12, 2016 8:11 AM To: [email protected] Subject: Re: [AFMUG] Non Pen Mount Question Rubber mats are almost always required when on a membrane roof. Not used if on gravel/rocks. Please no protruding bolt heads, the bottom of a nprm needs to be FLAT. roofs like this: https://www.google.ca/search?q=white+membrane+roofing&num=100&prmd=ivsn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiMgba8x6TKAhXGLmMKHRVGAgcQ_AUIBygB&biw=360&bih=559&dpr=3 On Jan 11, 2016 10:37 AM, "Chuck McCown" <[email protected]> wrote: If the mount has the head of a carriage bolt coming though on the bottom, will this be a problem? Now smooth does the bottom want to be? Are weld beads OK. Do you always use rubber mats under them?
