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Retain Pro 10
or LRFD (Allowable Stress Design or Load and Resistance Factor
Design). When the latter is selected the input notations change (e.g. fs
to fy) and all calculations are based upon LRFD.
Rebar Size:
Make your selection from the drop-down list box for bar sizes #3 to
#10. When U.S. units are used, “Soft Metric” sizes will be displayed in
parentheses.
Rebar Spacing: Use the spinners to set the rebar spacing in Concrete wall segments.
Use the drop-down list box to set the rebar spacing in Masonry wall
segments. For segments defined as "Fence" the rebar spacing input
is unavailable.
Rebar Position: Chose between Center or Edge. If Center is chosen, the rebar d
distance will be 1/2 the actual wall thickness. If Edge is chosen the
rebar will be located at the heel side of the stem as defined below.
For masonry wall segments, the program contains a table of the
appropriate "d" values to use for various block sizes and center/edge
locations, as shown in the table below.
Default Values of Rebar Position for Masonry Wall Segments
Thickness
Rebar Depth
(in)
Center
Edge
6"
2.75"
2.75"
8"
3.75"
5.25"
10"
4.75"
7.25"
12"
5.75"
9.0"
14"
6.75"
11.0"
16"
7.75"
13.0"
For concrete wall segments, the "edge" rebar depth is always stem
thickness less 1.5" for #5 and smaller bars (stem thickness less 2" for
#6 or larger), less one-half the bar diameter.
Specify Position :
Click this box to enter an explicit "d" value for the
particular stem segment.
f'm:
For Masonry stem segments, enter the compressive
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