August 31, 2010
|
RISA-3D,
Loads,
RISAFloor,
New,
Wind
RISAFloor
is
capable
of
automatically
generating
the
wind
loads
on
sloped
roofs.
Let’s
look
at
an
example
of
this
with
the
model
below:
Note
that
all
of
the
roof
members
are
defined
as
lateral.
This
is
optional,
as
only
the
ridge
beams
truly
need
to
be
defined
as
lateral.
However,
by
defining
the
rafters
as
lateral
they
will
transfer
into
RISA-3D,
and
will
be
designed
for
wind
load
and
uplift,
which
is
a
bonus.
When
transferring
the
model
to
RISA-3D
make
sure
that
the
Generate
Roof
Wind
Loads
box
is
checked
in
the
wind
loads
dialog.
Once
in
RISA-3D
you
can
review
the
four
basic
load
cases
that
have
been
generated
by
the
program
(WLX+R,
WLX-R,
WLZ+R,
WLZ-R).
A
positive
and
negative
load
case
is
created
for
each
wind
direction,
as
the
windward
load
magnitude
is
different
from
the
leeward.
Be
sure
to
generate
reversible
load
combinations
for
these
roof
wind
loads
to
account
for
this
in
the
Load
Combination
Generator…