Re: [AFMUG] ballast calucations

2020-08-18 Thread Steve Jones
Yeah, but that's for the specific npm. It's got to be base on something. I gotta build a custom npm in a limited pie slice footprint to hold a 4 foot, and 2 3 foot antenna about 7 feet up, and preferably a pmp cluster around 20 feet. I ordered 4k lb. ballast today. The site guy says 4k isnt a prob

Re: [AFMUG] ballast calucations

2020-08-17 Thread Adam Moffett
There's often a formula on the assembly drawings. On 8/17/2020 10:36 PM, Chuck McCown wrote: Probably depends on the actual wind load vs the design wind load. If both were lightly loaded then you will probably be fine. Sent from my iPhone On Aug 17, 2020, at 7:45 PM, Steve Jones wrote: 

Re: [AFMUG] ballast calucations

2020-08-17 Thread Chuck McCown
Probably depends on the actual wind load vs the design wind load. If both were lightly loaded then you will probably be fine. Sent from my iPhone > On Aug 17, 2020, at 7:45 PM, Steve Jones wrote: > >  > so if I have 2 npms that call for say 1000lbs ballast with mast and antenna > and decide

[AFMUG] ballast calucations

2020-08-17 Thread Steve Jones
so if I have 2 npms that call for say 1000lbs ballast with mast and antenna and decide to move both masts to a single npm, does that equate to 2000lbs ballast, or is there a base weight, then aperture windload is calculated? -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/a