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The diagonals brace the structure and carry loads
to heavy-duty, hot dip glavanized anchor castings. The
anchor castings transmit wind and/or earthquake loads
from the structure directly into the foundation.
For standard wind load conditions, anchor bolts are
required only at the perimeter.
Structural ceramic rings or glass reinforced nylon
shear plates are used in conventional connector ring
joints where greater strength is required than bolted
joints provide. Permissible joint loads are based on
Forest Products Laboratory test values established by
procedures for commercial ring connectors.
The fan deck is pressure treated exterior grade tongue-
and-groove fir plywood designed for a uniform load of 60
psf, or a 600 pound concentrated live load.