BlueSky Mast AL1 STANDARD Series, User Manual

Page: 10 / 76

Payload Capacity - Wind Load - Anchor Radius
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Anchor Radius
Ideal guying is set with an anchor radius of
80% of the mast height. Many applications
of mast deployments are not able to afford
an installation footprint of this size and
installers may find it more convenient to
place the guy anchors much closer to the
mast as shown in the figure to the right.
BlueSky Mast does not recommend configu-
rations utilizing less than 80% guy radius,
but if your site dictates that you must devi-
ate from the recommended configuration it
is imperative that the installer is aware of
the effects of the reduced anchor radius
and its effect on total payload capacity and
wind loading.
The angle of pull on the guy line relative to the anchor radius may produce a lever ef-
fect increasing the mast compression due to wind loading by a
factor of 5 !
The table at left shows the affect the anchor radius has on the
multiplying factors of compressive loads produced on the mast
by a horizontal wind force. Below are examples of various
anchor radii.
80%
30%