April 20, 2026
When
you
transfer
a
model
from
RISA-3D
into
RISAFoundation,
you
expect
the
reactions
and
design
assumptions
to
carry
over
cleanly
so
foundations
design
the
way
you
intended.
If
the
workflow
is
not
set
up
correctly,
you
can
end
up
with
soil
bearing
pressures,
uplift,
or
foundation
failures
that
don’t
match
what
you
saw
in
your
RISA-3D
results—and
it’s
not
always
obvious
where
the
mismatch
is
coming
from.
This
article
walks
through
how
the
integration
actually
works,
what
transfers
and
what
doesn’t,
and
a
simple
checklist
you
can
follow
to
get
reliable
foundation
results.
1.
Understand
What
Transfers
(and
What
Doesn’t)
RISAFoundation
reads
joint
reactions
organized
by
load
category,
not
by
load
combination.
Those
categories
are
defined
in
the
Basic
Load
Cases
spreadsheet
in
RISA-3D
(DL,
LL,
WL,
etc.).
What
comes
across:
Reactions
grouped
by
load
category
(DL,
LL,
WL,
etc.)
Supports
defined
as
Reaction
or
Spring
Wall
reactions
represented
as
a
series
of
point
loads
along
the
wall
base
(based
on
the
wall
mesh)
What
does
not
come
across:
Load
combinations
Fixed
supports
(these
do
not
appear
as
foundations)
Moving
loads
and
non-linear/second-order
effects
on
a
per-combination
basis
Model
Settings
come
over
only
the
first
time
you
transfer.
If
you…
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