August 30, 2019
|
Slab,
RISAFoundation,
New,
Reinforcement
RISAFoundation
has
the
ability
to
create
a
single
layer
of
reinforcement
anywhere
in
a
slab.
This
improvement
allows
for
a
more
straightforward
design
of
thin,
lightly
loaded
slab-on-grade
where
two
layers
of
reinforcement
(top/bottom)
would
be
unnecessary.
In
order
to
add
a
single
layer
of
reinforcement,
users
select
Single
Layer
from
the
Rebar
Options
drop-down
found
in
the
Mat
Slab
tab
of
the
Design
Rules
spreadsheet.
When
a
user
selects
Single
Layer,
only
the
inputs
for
Top
Bar
size
and
the
Max/Min
Top
Bar
Spacing
are
used.
Additionally,
the
value
of
Top
Cover
found
in
the
General
tab
is
used
to
define
the
depth
of
the
bar
in
the
slab.
Note:
When
Mid-Depth
Only
is
selected,
the
Bottom
Bar
size,
the
Max/Min
Bot
Bar
Spacing
and
the
Bot
Cover
are
used.
The
design
of
the
slab
will
differ
based
on
whether
the
reinforcement
is
placed
above
or
below
the
mid-depth
of
the
slab.
When
the
single
layer
is
placed
above
mid-depth,
the
slab
will
be
designed
according
to
slab-on-grade
requirements
found
in
ACI
360-R
and
ACI
223.
These
provisions
focus
mainly
on
design
in
response
to
crack
control.
When
the
single
layer
is
placed
below
mid-depth,
the
reinforcement
is
assumed…
