August 30, 2019
|
Loads,
Load Combinations,
RISAFoundation,
New
RISAFoundation
includes
the
ability
to
utilize
“nested”
load
combinations.
Currently,
the
Load
Combinations
spreadsheet
in
RISAFoundation
is
limited
to
ten
columns
of
Basic
Load
Cases
(BLCs)
and
Factor
combinations.
However,
there
are
times
where
you
may
need
to
include
additional
entries
to
your
Load
Combination.
To
do
this,
you
can
simply
“nest”
your
load
combinations.
This
means
that
if
you
need
more
than
eight
BLC
entries
in
a
single
load
combination,
you
can
define
the
common
BLCs
(such
as
Self
Weight,
DL,
and/or
LL)
in
one
load
combination
that
you
can
then
reference
in
the
other
load
combinations.
Entering
“Lnn”
in
the
BLC
field
will
include
all
the
BLCs
(and
their
factors)
from
the
load
combination
on
line
“nn”
of
the
spreadsheet,
thereby
“nesting”
the
combination.
This
can
also
be
used
to
simplify
your
input.
Note:
When
a
Factor
is
assigned
to
the
“nested”
BLC
line,
it
will
be
applied
to
all
the
entries
in
the
nested
combination.
For
example,
in
the
image
above,
the
DL
in
LC2
has
a
Factor
of
1.2,
whereas
the
“nested”
combination
(LC2)
has
a
Factor
of
1.5.
This
means
that
the
two
Factors
will
be
multiplied
together,
resulting
in
an
overall
factor
of
12*15…
