[TowerTalk] [Bulk] AlfaSpid Big-Rak 3 Inch Mast?

[Grant Saviers]

I welded a 5" long 3" IPS sch40 pipe (3.042" id)  stub to a 3/8" HRS 
steel plate about 6" square, and welded 8 HD 1/2-13 nuts over holes for 
grub screws to the mast.  The other side of the plate has a 2" IPS sch 
40 pipe stub welded to it that fits into the Big-Rak.  I had it hot dip 
galvanized, so the plate had a 1.5" diameter hole in the center for the 
Zn to flow thru.  I had to tap the 1/2-13 nuts after galvanizing.  
Painting would probably work fine, I had a bunch of stuff going to the 
galvanizer.

I mounted hoist rings on two corners of the 3/8 plate so I could hoist 
the mast/beam (about 500#) clear of the BigRak for when it needs removed 
for service.

Grant KZ1W


On 3/11/2015 6:56 PM, Rich Hallman - N7TR wrote:
> Anyone using or know if or how to use an AlfaSpid Big-Rak with a 3 inch mast?
>
> Thanks...
>
> Rich N7TR
> ex KI3V, N3AMK, WB3JOV
> www.n7tr.com<http://www.n7tr.com>
> http://www.qrz.com/db/N7TR
> Telnet: dxc.n7tr.com N7TR DXCluster
>
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