October 30, 2020
|
RISAFloor,
New,
Cold Formed Steel
In
many
cases,
cold-formed
steel
channels
are
built-up
as
back-to-back
profiles
in
order
to
add
strength
and
stability.
Previously,
these
sections
(along
with
face-to-face
profiles)
could
be
specified
in
RISAFloor,
but
unlike
in
RISA-3D
could
not
be
designed.
RISAFloor
v15
now
includes
the
ability
to
specify,
analyze
and
design
both
back-to-back
(B2B)
and
face-to-face
(F2F)
cold-formed
profiles
made
from
CU
or
CS
shapes
as
shown
below.
Once
the
back-to-back
profiles
are
added
to
a
RISAFloor
model,
they
can
be
shown
as
rendered
in
order
to
verify
they
have
been
added
properly.
With
the
shapes
added,
RISAFloor
can
now
complete
a
variety
of
code
checks
that
are
executed
for
back-to-back
sections
per
the
AISI.
One
thing
to
note
is
the
required
definition
of
the
value
of
“a”
which
signifies
the
spacing
of
the
connections
between
the
back-to-back
members.
This
value
is
utilized
to
properly
calculate
the
slenderness
(KL/r)
of
the
member
and
is
required
to
receive
a
code
check
for
any
back-to-back
cold-formed
member.
This
additional
spacing
input
is
listed
in
Beams
or
Columns
spreadsheet:
Beams:
Columns:
The
Detail
Report
for
back-to-back
members
shows
all
the
controlling
section
properties,
unbraced
lengths,
slenderness
and
connection
spacing
for
the
gravity
design
of
the…
