Robert,
You did not indicate what will be at the top of the 75 ft AB577 mast.
That will also have some bearing on how strong your guy point should be.
Since you are on a parking lot type area, I assume that you can park
vehicles on the surface. If so, then make a frame assembly that can be
held down by the weight of a car/truck by driving a wheel on top of the
assembly. Or, if you have vehicles with towing capabilities, then use
the tow hitch assembly to attach guy lines. If they can handle a
3000lb boat, then they will handle the 577 mast easily.
Oh, be sure to have the vehicle owners sign waivers relative to any
damage caused by a falling mast.
73,
Henry - K4TMC
-----Original Message-----
From: Robert West <robert.west@eatmoresoap.com>
To: towertalk@contesting.com
Sent: Sun, 26 Apr 2009 1:23 pm
Subject: [TowerTalk] AB-577 Surface Guy Anchors?
Hello all. I have acquired one of the AB-577 mast kits with the
extension
to 75'. I am needing to erect this on a parking lot type area,
asphalt.
We are not permitted to penetrate the asphalt so we need to fabricate a
method to anchor the guys on the surface, such as with weights. I've
seen a
method that is used for a non-penetrating mount for large dish antennas
on
roofs that consist of steel angle iron welded in a frame and filled with
concrete cinder blocks bolted together with threaded rod so that they
don't
move. Works well in that usage but how about something similar for a
guy
anchor? This is a temporary thing so it would need to be easily
removed.
But my real question is, besides any other ideas, how heavy would I
need to
make these 3 weights? The height is 75' and is rated for 75mph wind.
Would
feel safer if the guy anchors could give us 100mph just to be on the
safe
side. Maybe a layer or 2 of block and then sandbags?
Any ideas?
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