As a commercial construction superintendent with 25+ years in the field I
seldom have found the civil engineer to override the structural engineer's
specifications. Civil engineers although very educated in soil conditions
and bearing requirements do not "normally" factor in wind loads, material
strength limitations, and a variety of "mechanical" factors having nothing
to do with soils. If you have a rapport with both engineers I would suggest
you have them talk to each other and agree on any lessened base
requirements. All things considered when you factor in the costs of the
tower, antennas, rotor, feedlines, etc., etc. what is a few more yards of
concrete.
----- Original Message -----
From: "David Giuliani" <David@Giuliani.org>
To: "Towertalk" <towertalk@contesting.com>
Sent: Saturday, October 04, 2003 11:47 AM
Subject: [TowerTalk] deep base for MA-550
>
> I'm installing a concrete base for a Universal Towers MA-550. The mfg's
dwg
> calls for a base 2.5' x 2.5' x 5' deep in undisturbed soil, using 2.5
cubic
> yards. I passed this by my soils engineer, who's recommending a different
> design -- drill a 2' hole with an augur, 25' deep. Takes similar amount
of
> concrete, easier to make hole and not worry about backfilling, compacting,
> etc., and much more resistance to being pushed over. This would be a
> deviation from the adage: "do what the mfg recommends", replacing it with
> "do what the professional soil engineer recommends."
>
> Any experience with this form (pun!) of base? Advice?
>
> David Giuliani, WA6PXX
> Mercer Island, WA
>
----------------------------------------------------------------------------
----
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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